Граф коммитов

3043 Коммитов

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Alim Akhtar 04c16b84e4 regulator: s2mps11: Fix the voltage linear range for s2mps15
This patch fixes some of the LDOs and BUCKs voltage range as per
user manual of s2mps15 (REV0.4).

Fixes: 51af206758 ("regulator: s2mps11: Add support for S2MPS15 regulators")
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>
2016-07-12 09:24:05 +01:00
Boris Brezillon d9070fdbe4 regulator: pwm: Retrieve correct voltage
The continuous PWM voltage regulator is caching the voltage value in
the ->volt_uV field. While most of the time this value should reflect the
real voltage, sometime it can be sightly different if the PWM device
rounded the set_duty_cycle request.
Moreover, this value is not valid until someone has modified the regulator
output.

Remove the ->volt_uV field and always rely on the PWM state to calculate
the regulator output.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-07-11 08:44:29 +02:00
Boris Brezillon 87248991a1 regulator: pwm: Properly initialize the ->state field
The ->state field is currently initialized to 0, thus referencing the
voltage selector at index 0, which might not reflect the current
voltage value.
If possible, retrieve the current voltage selector from the PWM state,
else return -EINVAL.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Brian Norris <briannorris@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-07-11 08:43:24 +02:00
Boris Brezillon 3f4eb39be9 regulator: pwm: Switch to the atomic PWM API
Use the atomic API wherever appropriate and get rid of pwm_apply_args()
call (the reference period and polarity are now explicitly set when
calling pwm_apply_state()).

We also make use of the pwm_set_relative_duty_cycle() helper to ease
relative to absolute duty_cycle conversion.

Note that changes introduced by commit fd786fb027 ("regulator: pwm:
Try to avoid voltage error in duty cycle calculation") are no longer
needed because pwm_set_relative_duty_cycle() takes care of all rounding
approximation for us.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-07-11 08:43:21 +02:00
Boris Brezillon fd4f99c4c3 regulator: pwm: Adjust PWM config at probe time
The PWM attached to a PWM regulator device might have been previously
configured by the bootloader.
Make sure the bootloader and linux config are in sync, and adjust the PWM
config if that's not the case.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-07-11 08:41:37 +02:00
Douglas Anderson c2588393e6 regulator: pwm: Fix regulator ramp delay for continuous mode
The original commit adding support for continuous voltage mode didn't
handle the regulator ramp delay properly.  It treated the delay as a
fixed delay in uS despite the property being defined as uV / uS.  Let's
adjust it.  Luckily there appear to be no users of this ramp delay for
PWM regulators (as per grepping through device trees in linuxnext).

Note also that the upper bound of usleep_range probably shouldn't be a
full 1 ms longer than the lower bound since I've seen plenty of hardware
with a ramp rate of ~5000 uS / uV and for small jumps the total delays
are in the tens of uS.  1000 is way too much.  We'll try to be dynamic
and use 10%.

NOTE: This commit doesn't add support for regulator-enable-ramp-delay.
That could be done in a future patch when someone has a user of that
featre.

Though this patch is shows as "fixing" a bug, there are no actual known
users of continuous mode PWM regulator w/ ramp delay in mainline and so
this likely won't have any effect on anyone unless they are working
out-of-tree with private patches.  For anyone in this state, it is
highly encouraged to also pick Boris Brezillon's WIP patches to get
yourself a reliable and glitch-free regulator.

Fixes: 4773be185a ("regulator: pwm-regulator: Add support for continuous-voltage")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-07-07 11:45:06 +02:00
Mark Brown a29a36f265 Merge remote-tracking branches 'regulator/fix/anatop' and 'regulator/fix/max77620' into regulator-linus 2016-07-01 18:06:48 +02:00
Venkat Reddy Talla 91ff811f32 regulator: max77620: check for valid regulator info
SD4 regulator is not registered with regulator core
framework in probe as there is no support in MAX77620 PMIC,
removing SD4 entry from MAX77620 regulator information list
and checking for valid regulator information data before
configuring FPS source and FPS power up/down period to avoid
NULL pointer exception if regulator not registered with core.

Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-29 18:50:05 +01:00
James Ban 7524c1cebc regulator: da9211: add descriptions for da9212/da9214
This is a patch for adding description for da9212/da9214.

Signed-off-by: James Ban <James.Ban.opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-29 17:24:55 +01:00
Stefan Agner ed6d362d8d regulator: rn5t618: Add RN5T567 PMIC support
Extend the driver to support Ricoh RN5T567. Support the additional
DCDC and slightly different voltage range of LDORTC1.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-06-29 10:11:29 +01:00
Tero Kristo 3fb2ef111d regulator: tps65218: force set power-up/down strobe to 3 for dcdc3
The reset value for this register seems broken on certain versions of
tps65218 chip, so make sure the dcdc3 settings is proper. Needed for
proper functionality of rtc+ddr / rtc-only modes.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-27 17:56:43 +01:00
Tero Kristo b9a0d35941 regulator: tps65218: Enable suspend configuration
TPS65218 has a pre-defined power-up / power-down sequence which in
a typical application does not need to be changed. However, it is possible
to define custom sequences under I2C control. The power-up sequence is
defined by strobes and delay times. Each output rail is assigned to a
strobe to determine the order in which the rails are enabled.

Every regulator has sequence registers and every regulator has a default
strobe value and gets disabled when a particular power down sequence
occurs.

To keep a regulator on during suspend we write value 0 to strobe so
that the regulator is out of all sequencers and is not impacted by any
power down sequence. Hence saving the default strobe value during probe
so that when we want to regulator to be enabled during suspend we write 0
to strobe and when we want it to get disabled during suspend we write
the default saved strobe value.
This allows platform data to specify which power rails should be on or off
during RTC only suspend. This is necessary to keep DDR state while in RTC
only suspend.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-27 17:56:43 +01:00
Russ Dill 3de5609959 regulator: tps65217: Enable suspend configuration
The TPS65217 has a pre-defined power-up / power-down sequence which in
a typical application does not need to be changed. However, it is possible
to define custom sequences under I2C control. The power-up sequence is
defined by strobes and delay times. Each output rail is assigned to a
strobe to determine the order in which the rails are enabled.

Every regulator of tps65217 PMIC has sequence registers and every
regulator has a default strobe value and gets disabled when a particular
power down sequence occurs.

To keep a regulator on during suspend we write value 0 to strobe so
that the regulator is out of all sequencers and is not impacted by any
power down sequence. Hence saving the default strobe value during probe
so that when we want to regulator to be enabled during suspend we write 0
to strobe and when we want it to get disabled during suspend we write
the default saved strobe value.

This allows platform data to specify which power rails should be on or off
during RTC only suspend. This is necessary to keep DDR state while in RTC
only suspend.

Signed-off-by: Russ Dill <Russ.Dill@ti.com>
[Enhanced commit log and added dynamic allocation for strobes]
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-27 17:56:43 +01:00
Stephen Boyd 919163f636 regulator: qcom_spmi: Add support for get_mode/set_mode on switches
The voltage switches support mode switching, so add support for
these ops to those types of regulators.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: e92a404741 ("regulator: Add QCOM SPMI regulator driver")
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-26 12:24:07 +01:00
Stephen Boyd 93bfe79b03 regulator: qcom_spmi: Update mvs1/mvs2 switches on pm8941
The mvs1 and mvs2 switches are actually called 5vs1 and 5vs2 on
some datasheets. Let's rename them to match the datasheets and
also match the RPM based regulator driver which calls these by
their 5vs names (see qcom_smd-regulator.c). There aren't any
users of these regulators so far, so there aren't any concerns of
DT ABI breakage here. While we're here making updates to the
switches, also mandate usage of the OCP irq for these switches
too.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: e92a404741 ("regulator: Add QCOM SPMI regulator driver")
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-26 12:24:07 +01:00
Stephen Boyd c333dfe8db regulator: qcom_spmi: Add support for S4 supply on pm8941
The S4 supply is sometimes called the boost regulator because it
outputs 5V. Typically it's connected to the 5vs1 and 5vs2
switches for use in USB OTG and HDMI applications. Add support
for this regulator which was mistakenly left out from the initial
submission of this driver.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: e92a404741 ("regulator: Add QCOM SPMI regulator driver")
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-26 12:24:07 +01:00
Alexandre Courbot 27bfa8893b regulator: pwm: Support for enable GPIO
Add an optional enable GPIO to the pwm-regulator driver.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-23 11:34:35 +01:00
Keerthy a0f78bc89c regulator: of: setup initial suspend state
Setup initial suspend state to mem, if suspend state is defined for
mem state. This makes sure that the regulators are in proper mode
already from boot.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-22 16:15:34 +01:00
Axel Lin 4335f6537a regulator: lp873x: Drop _nlr parameter from LP873X_REGULATOR()
No need to pass _nlr to LP873X_REGULATOR(), use ARRAY_SIZE to calculate it.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-21 18:43:48 +01:00
Mika Båtsman 8a092e682f regulator: anatop: allow regulator to be in bypass mode
Bypass support was added in commit d38018f201 ("regulator: anatop: Add
bypass support to digital LDOs"). A check for valid voltage selectors was
added in commit da0607c8df ("regulator: anatop: Fail on invalid voltage
selector") but it also discards all regulators that are in bypass mode. Add
check for the bypass setting. Errors below were seen on a Variscite mx6
board.

anatop_regulator 20c8000.anatop:regulator-vddcore@140: Failed to read a valid default voltage selector.
anatop_regulator: probe of 20c8000.anatop:regulator-vddcore@140 failed with error -22
anatop_regulator 20c8000.anatop:regulator-vddsoc@140: Failed to read a valid default voltage selector.
anatop_regulator: probe of 20c8000.anatop:regulator-vddsoc@140 failed with error -22

Fixes: da0607c8df ("regulator: anatop: Fail on invalid voltage selector")
Signed-off-by: Mika Båtsman <mbatsman@mvista.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-17 11:40:20 +01:00
Axel Lin 43160ffd12 regulator: qcom_smd: Remove list_voltage callback for rpm_smps_ldo_ops_fixed
Use regulator_list_voltage_linear_range in rpm_smps_ldo_ops_fixed is
wrong because it is used for fixed regulator without any linear range.
The rpm_smps_ldo_ops_fixed is used for pm8941_lnldo which has fixed_uV
set and n_voltages = 1. In this case, regulator_list_voltage() can return
rdev->desc->fixed_uV without .list_voltage implementation.

Fixes: 3bfbb4d1a4 ("regulator: qcom_smd: add list_voltage callback")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-15 10:18:50 +01:00
Mark Brown 0d2a8ef439 Merge remote-tracking branches 'regulator/fix/qcom-smd' and 'regulator/fix/tps51632' into regulator-linus 2016-06-13 16:51:57 +01:00
Srinivas Kandagatla 3bfbb4d1a4 regulator: qcom_smd: add list_voltage callback
This patch adds support to list_voltage callback, so that consumers
like mmc core, can get information of supported voltage range.

Without this patch there is no way for mmc core to know this voltage range.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-13 09:51:35 +01:00
Mark Brown fc1e1c4a24 regulator: Remove regulator_can_change_voltage()
There is little obvious use case for a regualtor driver to know if it is
possible to vary voltages at all by itself.  If a consumer needs to
limit what voltages it tries to set based on the system configuration
then it will need to enumerate the possible voltages, and without that
even if it is possible to change voltages that doesn't mean that
constraints or other consumers will allow whatever change the driver is
trying to do at a given time.  It doesn't even indicate if _set_voltage()
calls will work as noop _set_voltage() calls return success.

There were no users of this API that weren't abusing it and now they're
all gone so remove the API.

Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-09 11:40:34 +01:00
Ben Dooks 2ac1ea2c4a regulator: twl: fix use of integer as pointer
The TWL6030_FIXED_LDO() macro passes the TWL_FIXED_LDO()
macro an 0x0 instead of a NULL. Changing this to a NULL
fixes the following warnings:

drivers/regulator/twl-regulator.c:1068:1: warning: Using plain integer as NULL pointer
drivers/regulator/twl-regulator.c:1069:1: warning: Using plain integer as NULL pointer
drivers/regulator/twl-regulator.c:1070:1: warning: Using plain integer as NULL pointer
drivers/regulator/twl-regulator.c:1071:1: warning: Using plain integer as NULL pointer
drivers/regulator/twl-regulator.c:1072:1: warning: Using plain integer as NULL pointer
drivers/regulator/twl-regulator.c:1073:1: warning: Using plain integer as NULL pointer

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-08 18:18:24 +01:00
Srinivas Kandagatla d1e44b6b28 regulator: qcom_smd: add regulator ops for pm8941 lnldo
After "regulator: qcom_smd: add list_voltage callback" patch adding
pm8941 lnldo regulators would bug on list_voltages as it is a fixed
regulator without any linear range.
This patch fixes that issue by adding dedicated ops for pm8941 lnldo
without list_voltages callback.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org # v4.6
2016-06-08 11:59:25 +01:00
Srinivas Kandagatla a8a47540eb regulator: qcom_smd: add list_voltage callback
This patch adds support to list_voltage callback, so that consumers
like mmc core, can get information of supported voltage range.

Without this patch there is no way for mmc core to know this voltage range.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org # v4.6
2016-06-08 11:59:00 +01:00
Fabio Estevam 7eeeab8c02 regulator: pfuze100-regulator: Adjust MODULE_DESCRIPTION()
Adjust the MODULE_DESCRIPTION() text to also include the PFUZE3000
as a supported device.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-06 19:13:48 +01:00
Fabio Estevam af2c55cd47 regulator: Kconfig: Mention that PFUZE3000 is also supported
The CONFIG_REGULATOR_PFUZE100 option also supports PFUZE3000, so
mention that in the Kconfig text.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-06 19:13:48 +01:00
Fabio Estevam 124256548f regulator: pfuze100-regulator: Remove global variable
We should better not use a global 'struct pfuze_regulator' variable,
as this could cause problems if multiple regulator chips are used.

Place it inside the private struct instead.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-06 19:13:48 +01:00
Hans de Goede 636e2a39cf regulator: axp20x: Add support for the (external) drivebus regulator
The axp20x pmics have 2 power inputs, one called ACIN which is intended
for to be supplied via a powerbarrel on the board and one called VBUS
which is intended to be supplied via an otg connector.

In the VBUS case the pmic needs to know if the board is supplying power
to the otg connector, because then it should not take any power from
its VBUS pin. The axp209 pmic has a N_VBUSEN input pin via which the
board can signal to the pmic whether the board is supplying power to the
otg connector or not.

On the axp221/axp223 this pin can alternatively be used as an output
which controls an external regulator which (optionally) supplies
power to the otg connector from the board. When the pin is used as
output it is called DRIVEVBUS in the datasheet.

This commit adds support for the DRIVEVBUS pin as an extra pmic
controlled regulator. Since this is optional a new x-powers,drivebus dt
property is added. When this is present the misc-control register is
written to change the N_VBUSEN input pin to DRIVEVBUS output pin mode and
the extra drivebus regulator is registered with the regulator subsystem.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-06 18:38:30 +01:00
Boris Brezillon 830583004e regulator: pwm: Drop unneeded pwm_enable() call
Now that the PWM regulator driver implements the ->enable/disable() hooks
we can remove the pwm_enable() call from pwm_regulator_set_voltage().

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-03 11:42:48 +01:00
Lu Baolu 13bed58ce8 regulator: fixed: add support for ACPI interface
Add support to retrieve fixed voltage configure information through
ACPI interface. This is needed for Intel Bay Trail devices, where a
GPIO is used to control the USB vbus.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-01 16:19:02 +01:00
Chen-Yu Tsai a51f9f4622 regulator: axp20x: support AXP809 variant
The X-Powers AXP809 PMIC has a similar set of regulators as the AXP221,
though a few LDOs were removed, and a new switch output added. Like the
AXP221, AXP809 also has DC1SW and DC5LDO, which are internally chained
to DCDC1 and DCDC5, respectively.

Add support for this new variant. Also remove the "axp22x_" prefix from
DC1SW/DC5LDO supply handling code, as the AXP809 uses it as well.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-31 18:37:07 +01:00
Axel Lin c714a588fc regulator: tps51632: Fix setting ramp delay
According to the datasheet:

SLEW Register(Address = 07h)
b7      b6      b5      b4      b3      b2      b1      b0
48mV/us 42mV/us 36mV/us 30mV/us 24mV/us 18mV/us 12mV/us 6mV/us

Current code does not set correct slew rate in some cases:
e.g. Assume ramp_delay is 10000, current code sets slew register to 6mV/us.
Fix the logic to set slew register.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-31 16:38:01 +01:00
Axel Lin d0abd6f5f5 regulator: max8973: Fix setting ramp delay
Current code can set ramp delay to a wrong setting that the return value
from .set_voltage_time_sel is not enough for proper delay.
Fix the logic in .set_ramp_delay and also remove unused ret_val variable.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-30 17:00:56 +01:00
Henry Chen 0569251327 regulator: mt6397: Add buck change mode regulator interface for mt6397
BUCKs of mt6397 have auto mode and pwm mode.
User can use regulator interfaces to control modes

Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-30 16:29:43 +01:00
Henry Chen fb69114b3e regulator: mt6397: Constify struct regulator_ops
Consitify the structure of regulator operations.

Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-30 16:29:43 +01:00
Axel Lin c8a28a0dbe regulator: pv880x0: Clean up unnecessary header inclusion
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-30 16:29:39 +01:00
Laxman Dewangan f5a6d35163 regulator: fixed: Remove workaround to handle of_get_named_gpio() return
The GPIO interface of_get_named_gpio() has implemented the proper
error returns even EPROBE_DEFER and hence caller need not to
implement any workaround for translating the returned error.

Remove the workaround implemented to handle the return of
of_get_named_gpio().

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-30 16:29:34 +01:00
Mark Brown 4f38c566a0 Merge remote-tracking branches 'regulator/topic/tps6524x' and 'regulator/topic/twl' into regulator-next 2016-05-13 14:23:49 +01:00
Mark Brown 39d652e066 Merge remote-tracking branches 'regulator/topic/pwm', 'regulator/topic/qcom-spmi', 'regulator/topic/rk808' and 'regulator/topic/s2mps11' into regulator-next 2016-05-13 14:23:46 +01:00
Mark Brown eb76d8407c Merge remote-tracking branches 'regulator/topic/max77686', 'regulator/topic/max8973', 'regulator/topic/maxim', 'regulator/topic/palmas' and 'regulator/topic/pv88080' into regulator-next 2016-05-13 14:23:38 +01:00
Mark Brown ce59dedfef Merge remote-tracking branches 'regulator/topic/fan53555', 'regulator/topic/lp3971', 'regulator/topic/lp3972', 'regulator/topic/lp873x' and 'regulator/topic/max77620' into regulator-next 2016-05-13 14:23:34 +01:00
Mark Brown 78d5501cf4 Merge remote-tracking branches 'regulator/topic/can-change', 'regulator/topic/constrain', 'regulator/topic/debugfs' and 'regulator/topic/doc' into regulator-next 2016-05-13 14:23:27 +01:00
Mark Brown 8595bb27ce Merge remote-tracking branches 'regulator/topic/abb', 'regulator/topic/act8865', 'regulator/topic/as3722' and 'regulator/topic/axp20x' into regulator-next 2016-05-13 14:23:08 +01:00
Mark Brown ab3688541d Merge remote-tracking branch 'regulator/topic/supply' into regulator-next 2016-05-13 14:23:01 +01:00
Mark Brown 170b649e40 Merge remote-tracking branch 'regulator/topic/core' into regulator-next 2016-05-13 14:22:57 +01:00
Mark Brown 75941a1ba3 Merge remote-tracking branch 'regulator/topic/bypass' into regulator-next 2016-05-13 14:22:55 +01:00
Mark Brown 93878cd540 Merge remote-tracking branches 'regulator/fix/constrain' and 'regulator/fix/defer' into regulator-linus 2016-05-13 14:22:43 +01:00
Mark Brown 5535fc7958 Merge remote-tracking branch 'regulator/fix/core' into regulator-linus 2016-05-13 14:22:41 +01:00
Mark Brown e9cb77d03c Merge remote-tracking branch 'regulator/fix/bypass' into regulator-linus 2016-05-13 14:22:38 +01:00
Wadim Egorov 9e9daa0a67 regulator: rk808: Migrate to regulator core's simplified DT parsing code
A common simplified DT parsing code for regulators was introduced in
commit a0c7b164ad ("regulator: of: Provide simplified DT parsing
method")

While at it also added RK8XX_DESC and RK8XX_DESC_SWITCH macros for the
regulator_desc struct initialization. This just makes the driver more compact.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-13 12:19:57 +01:00
Mark Brown 9689dab30a Merge remote-tracking branches 'regulator/fix/axp20x', 'regulator/fix/da9063', 'regulator/fix/gpio' and 'regulator/fix/s2mps11' into regulator-linus 2016-05-13 11:11:08 +01:00
Keerthy 994aae32b1 regulator: lp873x: Add support for lp873x PMIC regulators
The regulators set consists of 2 BUCKs and 2 LDOs. The output
voltages are configurable and are meant to supply power to the
main processor and other components. The ramp delay is configurable
for both BUCKs.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-11 17:53:08 +01:00
Geert Uytterhoeven ac40b44174 regulator: da9063: Correct module alias prefix to fix module autoloading
s/paltform/platform/

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-10 20:00:49 +01:00
Nishanth Menon 6c7d614fa2 regulator: tps65917/palmas: Simplify multiple dereference of match->of_node
Just dereference match->of_node once instead of using match->of_node.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-06 18:15:18 +01:00
Nishanth Menon 7f091e53c9 regulator: tps65917/palmas: Handle possible memory allocation failure
Stop the palmas regulator driver from imagining that the allocations
will always succeed. Since regulator dt nodes are optional in nature and
can be described in downstream drivers via platform data, continue to
maintain code flow as prior when of node is not found.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-06 18:15:18 +01:00
Nishanth Menon 1b42443db6 regulator: tps65917/palmas: Simplify multiple dereference of pdata->reg_init[idx]
Converting dt to platform data logic involves picking up information
that is unique per regulator, however we can improve readability of
the code by allocating and referencing pdata->reg_init[idx] once in
the loop.

While at it, use sizeof(*pointer) when allocating pointer. This allows
for structure name changes with minimal code change.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-06 18:15:17 +01:00
Nishanth Menon 036d193d33 regulator: tps65917/palmas: Simplify multiple dereference of ddata->palmas_matches[idx]
Converting dt to platform data logic involves picking up information
that is unique per regulator, however we can improve readability of
the code by dereferencing ddata->palmas_matches[idx] once in the loop.

While at it fix reuse of generic palmas_matches common variable
while reporting error for a specific regulator (which may be from
65917/palmas list).

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-06 18:15:17 +01:00
Mark Brown bc0868c62b Merge branch 'for-4.7/pwm-regulator' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm into regulator-pwm 2016-05-03 15:09:56 +01:00
Boris Brezillon 8c12ad8e91 regulator: pwm: Use pwm_get_args() where appropriate
The PWM framework has clarified the concept of reference PWM config (the
platform dependent config retrieved from the DT or the PWM lookup table)
and real PWM state.

Use pwm_get_args() when the PWM user wants to retrieve this reference
config and not the current state.

This is part of the rework allowing the PWM framework to support
hardware readout and expose real PWM state even when the PWM has just
been requested (before the user calls pwm_config/enable/disable()).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-05-03 13:46:50 +02:00
Krzysztof Kozlowski a9597305d9 regulator: max77686: Configure enable time to properly handle regulator enable
The enable time for buck regulators was not configured but actually is
essential: consumers, like usb3503, doing hard reset (regulator off/on)
should wait for the regulator to settle.

Configure the enable time according to datasheet.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-29 12:31:39 +01:00
Hans de Goede f40d4896bf regulator: axp20x: Fix axp22x ldo_io registration error on cold boot
The maximum supported voltage for ldo_io# is 3.3V, but on cold
boot the selector comes up at 0x1f, which maps to 3.8V.

This causes _regulator_get_voltage() to fail with -EINVAL which
causes regulator registration to fail when constrains are used:

[    1.467788] vcc-touchscreen: failed to get the current voltage(-22)
[    1.474209] axp20x-regulator axp20x-regulator: Failed to register ldo_io1
[    1.483363] axp20x-regulator: probe of axp20x-regulator failed with error -22

This commits makes the axp20x regulator driver accept the 0x1f register
value, fixing this.

The datasheet does not guarantee reliable operation above 3.3V, so on
boards where this regulator is used the regulator-max-microvolt setting
must be 3.3V or less.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-29 11:43:50 +01:00
Wadim Egorov 129d7cf98f regulator: rk808: Add rk808_reg_ops_ranges for LDO3
LDO_REG3 descriptor is using linear_ranges.
Add and use proper ops for LDO_REG3.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-27 17:03:34 +01:00
Jon Hunter 45389c4752 regulator: core: Add early supply resolution for regulators
The call to set_machine_constraints() in regulator_register(), will
attempt to get the voltage for the regulator. If a regulator is in
bypass will fail to get the voltage (ie. it's bypass voltage) and
hence register the regulator, because the supply for the regulator has
not been resolved yet.

To fix this, add a call to regulator_resolve_supply() before we call
set_machine_constraints(). If the call to regulator_resolve_supply()
fails, rather than returning an error at this point, allow the
registration of the regulator to continue because for some regulators
resolving the supply at this point may not be necessary and it will be
resolved later as more regulators are added. Furthermore, if the supply
is still not resolved for a bypassed regulator, this will be detected
when we attempt to get the voltage for the regulator and an error will
be propagated at this point.

If a bypassed regulator does not have a supply when we attempt to get
the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead
to allow the registration of the regulator to be deferred and tried
again later.

Please note that regulator_resolve_supply() will call
regulator_dev_lookup() which may acquire the regulator_list_mutex. To
avoid any deadlocks we cannot hold the regulator_list_mutex when calling
regulator_resolve_supply(). Therefore, rather than holding the lock
around a large portion of the registration code, just hold the lock when
aquiring any GPIOs and setting up supplies because these sections may
add entries to the regulator_map_list and regulator_ena_gpio_list,
respectively.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-27 16:32:19 +01:00
Mark Brown cbc13a66fd Merge branch 'topic/bypass' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-supply 2016-04-27 16:32:14 +01:00
Hans de Goede a2262e5a12 regulator: axp20x: Fix axp22x ldo_io voltage ranges
The minium voltage of 1800mV is a copy and paste error from the axp20x
regulator info. The correct minimum voltage for the ldo_io regulators
on the axp22x is 700mV.

Fixes: 1b82b4e4f9 ("regulator: axp20x: Add support for AXP22X regulators")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-27 16:14:52 +01:00
Nishanth Menon e0341f1732 regulator: tps65917/palmas: Add bypass "On" value
When commit b554e14506 ("regulator: tps65917/palmas: Add bypass
ops for LDOs with bypass capability") introduced bypass capability
to palmas regulator, it went with the assumption that regulator
regmap helpers just check val against the bypass_mask.

Unfortunately, this ignored the explicit "on" and "off" values when
the register value is masked with bypass_mask in commit ca5d1b3524
("regulator: helpers: Modify helpers enabling multi-bit control").

With the recent commit dd1a571dae ("regulator: helpers: Ensure
bypass register field matches ON value"), this issue gets highlighted
and fails tps65917/palmas based platforms which need regulators/ldos
that have bypass capability.

Introduce the bypass_on value appropriately for tps65917/palmas
regulator.

Fixes: b554e14506 ("regulator: tps65917/palmas: Add bypass ops for LDOs with bypass capability")
Cc: Keerthy <j-keerthy@ti.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 17:41:38 +01:00
Maxime Ripard 8d4d5c3a7c regulator: axp20x: Fix LDO4 linear voltage range
The current linear voltage range for the LDO4 regulator found in the APX20X
PMICs assumes that the voltage is linear between 2.5 and 3.1V.

However, the PMIC can output up to 3.3V on that regulator by skipping the
2.6V and 2.9V steps.

Fix the ranges to read and set the proper voltages.

Fixes: 13d57e6435 ("regulator: axp20x: Use linear voltage ranges for AXP20X LDO4")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 15:57:45 +01:00
Arnd Bergmann 4a5ed8c1ad regulator: rk808: remove unused rk808_reg_ops_ranges
After removing all uses of the range operations in a recent patch,
we get a warning about the symbol not being referenced anywhere:

drivers/regulator/rk808-regulator.c:306:29: 'rk808_reg_ops_ranges' defined but not used

This removes the now-unused structure along with the
rk808_set_suspend_voltage_range function that is only referenced from
rk808_reg_ops_ranges.

Fixes: afcd666d9d ("regulator: rk808: remove linear range definitions with a single range")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 11:11:29 +01:00
WEN Pingbo 8a34e979f6 regulator: refactor valid_ops_mask checking code
To make the code more compat and centralized, this patch add a
unified function - regulator_ops_is_valid. So we can add
some extra checking code easily later.

Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-25 18:52:06 +01:00
Wadim Egorov afcd666d9d regulator: rk808: remove linear range definitions with a single range
The driver was using only linear ranges. Now we remove linear range
definitions with a single range. So we have to add an ops struct for
ranges and adjust all other ops functions accordingly.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-25 18:38:11 +01:00
Laxman Dewangan 5aa43599da regulator: max77620: Add support for device specific ramp rate setting
Maxim advertised the ramp rate of the rail with some recommended
design specification like output capacitance of rail should be
2.2uF. This make sure that current change in the rail is within
maximum current limit and hence meet the advertised ramp rate.

If there is variation in design which causes the rail current to
change more that maximum current limit then device applies the
current limit. In this case, ramp rate is different than advertised
ramp rate.

Add device specific settings for ramp rate which need to be configure
on device register when measure ramp rate on platform is deviated from
advertised ramp rate. In this case, all delay time calculation for
voltage change is done with measured ramp rate and device ramp rate
is used for configuring the device register.

If measured ramp rate in the platform is same as advertised ramp rate
then regulator-ramp-delay is used for the device register configuration
and ramp time calculation for voltage change.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 16:26:41 +01:00
Jon Hunter dd1a571dae regulator: helpers: Ensure bypass register field matches ON value
When checking bypass state for a regulator, we check to see if any bits
in the bypass mask are set. For most cases this is fine because there is
typically, only a single bit used to determine if the regulator is in
bypass. However, for some regulators, such as LDO6 on AS3722, the bypass
state is indicate by a value rather than a single bit. Therefore, when
checking the bypass state, check that the bypass field matches the ON
value.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 11:49:03 +01:00
Jon Hunter c438b9d017 regulator: core: Move registration of regulator device
The public functions to acquire a regulator, such as regulator_get(),
internally look-up the regulator from the list of regulators that have
been registered with the regulator device class. The registration of
a new regulator with the regulator device class happens before the
regulator has been completely setup. Therefore, it is possible that
the regulator could be acquired before it has been setup successfully.
To avoid this move the device registration of the regulator to the end
of the regulator setup and update the error exit path accordingly.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 11:38:47 +01:00
Mark Brown f89ba3383e Merge branch 'topic/sysfs-init' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-supply 2016-04-22 11:38:42 +01:00
Jon Hunter 8e5356a736 regulator: core: Clear the supply pointer if enabling fails
During the resolution of a regulator's supply, we may attempt to enable
the supply if the regulator itself is already enabled. If enabling the
supply fails, then we will call _regulator_put() for the supply.
However, the pointer to the supply has not been cleared for the
regulator and this will cause a crash if we then unregister the
regulator and attempt to call regulator_put() a second time for the
supply. Fix this by clearing the supply pointer if enabling the supply
after fails when resolving the supply for a regulator.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 11:35:54 +01:00
Jon Hunter 7ddede6a58 regulator: core: Don't terminate supply resolution early
The function regulator_register_resolve_supply() is called from the
context of class_for_each_dev() (during the regulator registration) to
resolve any supplies added. regulator_register_resolve_supply() will
return an error if a regulator's supply cannot be resolved and this will
terminate the loop in class_for_each_dev(). This means that we will not
attempt to resolve any other supplies after one has failed. Hence, this
may delay the resolution of other regulator supplies until the failing
one itself can be resolved.

Rather than terminating the loop early, don't return an error code and
keep attempting to resolve any other supplies for regulators that have
been registered.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 11:34:47 +01:00
Richard Fitzgerald 2d80a91b2f regulator: core: Add debugfs to show constraint flags
There are debugfs entries for voltage and current, but not for
the constraint flags. It's useful for debugging to be able to
see what these flags are so this patch adds a new debugfs file.
We can't use debugfs_create_bool for this because the flags are
bitfields, so as this needs a special read callback they have been
collected into a single file that lists all the flags.

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 10:28:52 +01:00
Mark Brown ae714c3b8e regulator: tps6524x: Fix broken use of spi_dev_get()
The tps6524x driver uses spi_dev_get() to take a copy of the SPI device
it uses but has no obvious reason to do so and never calls spi_dev_put()
to release the reference.  Fix this to just a straight copy.

Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-20 17:37:59 +01:00
Wadim Egorov e57cbb70b7 regulator: fan53555: Add support for FAN53555UC13X type
IC type options 00, 13 and 23 are sharing the same DIE_ID 0.
Let's differentiate between these revisions.
FAN53555UC13X has the ID 0 and REV 0xf, starts at 800mV and
increments in 10mV steps.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-20 10:57:26 +01:00
Wadim Egorov 5e39cf4972 regulator: fan53555: Add support for FAN53555BUC18X type
FAN53555BUC18X has the DIE_ID 8, starts at 600mV and
increments in 10mV steps.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-20 10:57:26 +01:00
Tero Kristo 07c5c3ad98 regulator: core: remove lockdep assert from suspend_prepare
suspend_prepare can be called during regulator init time also, where
the mutex is not locked yet. This causes a false lockdep warning.
To avoid the problem, remove the lockdep assertion from the function
causing the issue. An alternative would be to lock the mutex during
init, but this would cause other problems (some APIs used during init
will attempt to lock the mutex also, causing deadlock.)

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-18 18:13:24 +01:00
James Ban 99cf3af5e2 regulator: pv88080: new regulator driver
This is the driver for the Powerventure PV88080 BUCKs regulator.
It communicates via an I2C bus to the device.

Signed-off-by: James Ban <James.Ban..opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-18 17:53:57 +01:00
Krzysztof Kozlowski 94be46b9e5 regulator: s2mps11: Set default ramp delay for S2MPS11 LDOs
Driver did not provide default value for ramp delay for LDOs which lead
to warning in dmesg, e.g. on Odroid XU4:

[    1.486076] vdd_ldo9: ramp_delay not set
[    1.506875] vddq_mmc2: ramp_delay not set
[    1.523766] vdd_ldo15: ramp_delay not set
[    1.544702] vdd_sd: ramp_delay not set

The datasheet for all the S2MPS1x family is inconsistent here and does
not specify unambiguously the value of ramp delay for LDO. It mentions
30 mV/us in one timing diagram but then omits it completely in LDO
regulator characteristics table (it is specified for bucks).

However the vendor kernels for Galaxy S5 and Odroid XU3 use values of 12
mV/us or 24 mV/us.

Without the ramp delay value the consumers do not wait for voltage
settle after changing it. Although the proper value of ramp delay for
LDOs is unknown, it seems safer to use at least some value from
reference kernel than to leave it unset.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-18 17:31:38 +01:00
Stephen Boyd b1d21a24df regulator: qcom_spmi: Always return a selector when asked
I had a thinko in spmi_regulator_select_voltage_same_range() when
converting it to return selectors via the function's return value
instead of by modifying a pointer argument. I only tested
multi-range regulators so this passed through testing. Fix it by
returning the selector here.

Fixes: 1b5b196892 ("regulator: qcom_spmi: Only use selector based regulator ops")
Reported-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-18 11:05:11 +01:00
Dan Carpenter 7cb7348f75 regulator: lp3972: Silence uninitialized variable warning
This is harmless but my static checker complains that "tmp" is
uninitialized if lp3972_i2c_read() fails.  I have moved the line of code
below the error handling to silence the warning.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-14 14:46:19 +01:00
Dan Carpenter 40e1d79ee1 regulator: lp3971: Silence uninitialized variable warning
This is harmless but if lp3971_i2c_read() fails then "tmp" can be
uninitialized.  Silence the warning by moving the error handling up a
line.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-14 14:46:05 +01:00
Laxman Dewangan d2d5437bdf regulator: max8973: add support for junction thermal warning
The driver MAX8973 supports the driver for Maxim PMIC MAX77621.
MAX77621 supports the junction temp warning at 120 degC and
140 degC which is configurable. It generates alert signal when
junction temperature crosses these threshold.

MAX77621 does not support the continuous temp monitoring of
junction temperature. It just report whether junction temperature
crossed the threshold or not.

Add support to
- Configure junction temp warning threshold via DT property
to generate alert when it crosses the threshold.
- Add support to interrupt the host from this device when alert
occurred.
- read the junction temp via thermal framework.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-13 17:19:26 +01:00
Mark Brown 2c0a303a12 regulator: core: Fix locking of GPIO list on free
When we acquire a shareable enable GPIO on probe we do so with the
regulator_list_mutex held.  However when we release the GPIOs we do this
immediately after dropping the mutex meaning that the list could become
corrupted.  Move the release into the locked region to avoid this.

Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-13 07:43:00 +01:00
Boris Brezillon 469b640e4f regulator: reorder initialization steps in regulator_register()
device_register() is calling ->get_voltage() as part of it's sysfs attribute
initialization process, and this functions might need to know the regulator
constraints to return a valid value.
This is at least true for the pwm regulator driver (when operating in
continuous mode) which needs to know the minimum and maximum voltage values
to calculate the current voltage:

min_uV + (((max_uV - min_uV) * dutycycle) / 100);

Move device_register() after set_machine_constraints() to make sure those
constraints are correctly initialized when ->get_voltage() is called.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Stephen Barber <smbarber@chromium.org>
Tested-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-13 07:33:44 +01:00
Mark Brown fef9501901 regulator: core: Use parent voltage from the supply when bypassed
When a regulator is in bypass mode it is functioning as a switch
returning the voltage set in the regulator will not give the voltage
being output by the regulator as it's just passing through its supply.
This means that when we are getting the voltage from a regulator we
should check to see if it is in bypass mode and if it is we should
report the voltage from the supply rather than that which is set on the
regulator.

Reported-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
[treding@nvidia.com: return early for bypass mode]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-12 05:32:30 +01:00
Thierry Reding 162c5a368f regulator: as3722: Constify regulator ops
A const pointer to regulator ops is stored in regulator descriptors. The
operations never need to be modified, so define them as const as a hint
to the compiler that they can go into .rodata.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-11 15:15:36 +01:00
Jon Hunter 40a865500c regulator: as3722: Add bypass support for LDO6
LD06 on the AS3722 power management IC supports a bypass mode. Bypass
is enabled for the LDO by writing the value 0x3F to the voltage select
field in the control register for the LDO. Note that this is the same
register and field that is used to select the voltage as well for the
LDO.

Add support for bypass on LDO6 by specifying the various bypass
parameters for regulator and adding new function pointer tables for the
LDO. Note that the bypass OFF value is the same as the ON value simply
because there is no actual OFF value and bypass will be disabled when
a new voltage is written to the VSEL field.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-11 15:15:36 +01:00
Javier Martinez Canillas 314a8203b6 regulator: max77686: Use module_platform_driver() instead subsys initcall
The driver's init and exit function don't do anything besides registering
and unregistering the platform driver, so the module_platform_driver()
macro could just be used instead of having separate functions.

Currently the macro is not being used because the driver is initialized at
subsys init call level but this isn't necessary since consumer devices are
defined in the DT as dependencies so there's no need for init calls order.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-06 10:12:26 -07:00
Javier Martinez Canillas 5ab3c49495 regulator: s2mps11: Use module_platform_driver() instead subsys initcall
The driver's init and exit function don't do anything besides registering
and unregistering the platform driver, so the module_platform_driver()
macro could just be used instead of having separate functions.

Currently the macro is not being used because the driver is initialized at
subsys init call level but this isn't necessary since consumer devices are
defined in the DT as dependencies so there's no need for init calls order.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-06 10:12:00 -07:00
Ivaylo Dimitrov 74d8b45fa3 regulator: twl: Fix a typo in twl4030_send_pb_msg
Commit <2330b05c095bdeaaf1261c54cd2d4b9127496996> ("regulator: twl: Make
sure we have access to powerbus before trying to write to it")
has implemented the needed logic to correctly access powerbus through i2c,
however it brought a typo when powerbus configuration is restored, which
results in writing to a wrong register. Fix that by providing the correct
register value.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-06 10:10:50 -07:00
Laxman Dewangan fd786fb027 regulator: pwm: Try to avoid voltage error in duty cycle calculation
In continuous mode of the PWM regulators, the requested voltage
PWM duty cycle is calculated in terms of 100% scale where entire
range denotes 100%. The calculation for PWM pulse ON time(duty_pulse)
is done as:

	duty_cycle = ((requested - minimum) * 100) / voltage_range.

then duty pulse is calculated as
	duty_pulse = (pwm_period/100) * duty_cycle

This leads to the calculation error if we have the requested voltage
where accurate pulse time is possible.
For example: Consider following case
	voltage range is 800000uV to 1350000uV.
	pwm-period = 1550ns (1ns time is 1mV).

	Requested 900000uV.

	duty_cycle = ((900000uV - 800000uV) * 100)/ 1550000
		   = 6.45 but we will get 6.

	duty_pulse = (1550/100) * 6 = 90 pulse time.

90 pulse time is equivalent to 90mV and this gives us pulse time equivalent
to 890000uV instead of 900000uV.

Proposing the solution in which if requested voltage makes the accurate
duty pulse then there will not be any error. On this case, if
(req_uV - min_uV) * pwm_period is perfect dividable by voltage_range
then get the duty pulse time directly.

	duty_pulse = ((900000uV - 800000uV) * 1550)/1550000)
		   = 100

and this is equivalent to 100mV and so final voltage is
(800000 + 100000) = 900000uV which is same as requested,

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-05 11:39:25 -07:00
Krzysztof Kozlowski 724fef5344 regulator: max8997/max77802: Fix misspelled Samsung address
Correct smasung.com into samsung.com.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-05 11:37:49 -07:00
Ivaylo Dimitrov a221f95ef4 regulator: twl: Provide of_map_mode for twl4030
of_map_mode is needed so to be possible to set initial regulators mode from
the board DTS. Otherwise, for DT boot, regulators are left in their default
state after reset/reboot. Document device specific modes as well.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-05 11:35:33 -07:00
Stephen Boyd 1b5b196892 regulator: qcom_spmi: Only use selector based regulator ops
Mixing raw voltage and selector based regulator ops is
inconsistent. This driver already supports some selector based
ops via the list_voltage and set_voltage_time_sel ops but it uses
raw voltage ops for get_voltage and set_voltage. This causes
problems for regulator_set_voltage() and automatic insertion of
slewing delays because set_voltage_time_sel() is only used if the
regulator ops are all selector based. Put another way, delays
aren't happening at all right now when we should be waiting for
voltages to settle. Let's move to pure selector based regulator
ops so that the delays are inserted properly.

Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-31 10:32:41 -07:00
Stephen Boyd 2cf7b99cf7 regulator: qcom_spmi: Add slewing delays for all SMPS types
Only the FT SMPS type regulators have slewing supported in the
driver, but all types of SMPS regulators need the same support.
The only difference is that some SMPS regulators don't have a
step size and the step delay is typically 20, not 8. Luckily, the
step size reads as 0 for the non-FT types, so we can always read
that, but we need to detect which type of regulator we're using
to figure out what step delay to use. Make these minor
adjustments to the slew rate calculations and add support for the
delay function to the appropriate regulator ops.

Reported-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-31 10:32:35 -07:00
Jon Hunter a215137423 regulator: Fix deadlock during regulator registration
Commit 5e3ca2b349 ("regulator: Try to resolve regulators supplies on
registration") added a call to regulator_resolve_supply() within
regulator_register() where the regulator_list_mutex is held. This causes
a deadlock to occur on the Tegra114 Dalmore board when the palmas PMIC
is registered because regulator_register_resolve_supply() calls
regulator_dev_lookup() which may try to acquire the regulator_list_mutex
again.

Fix this by releasing the mutex before calling
regulator_register_resolve_supply() and update the error exit path to
ensure the mutex is released on an error.

[Made commit message more legible -- broonie]

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-30 11:03:54 -07:00
Mark Brown 45fa2038cf regulator: of: Don't flag voltage change as possible for exact voltages
Flagging voltage changes as possible for exactly specified voltages
appears to be triggering bugs in the SDHCI code (it should be able to
handle the case where only one voltage it wants is in the range it is
allowed to set) so make sure we only set the flag in cases where there's
genuine variability.

Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-30 08:26:09 -07:00
Mark Brown 45a91e8f76 regulator: core: Log when we bring constraints into range
This aids in debugging problems triggered by the regulator core applying
its constraints, we could potentially crash immediately after updating
the voltage if the constraints are buggy.

Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-29 16:37:46 -07:00
Maarten ter Huurne c5c9c2df4d regulator: act8865: Configure register access for act8600
This can be used to expose the act8600 registers via debugfs.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 12:34:20 -07:00
Maarten ter Huurne 005e46857e regulator: act8865: Pass of_node via act8865_regulator_data
This makes the code easier to read and it avoids a dynamic memory
allocation.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 12:34:20 -07:00
Javier Martinez Canillas 86cf635a31 regulator: Rename files for Maxim PMIC drivers
Most Maxim PMIC regulator drivers are for sub-devices of Multi-Function
Devices with drivers under drivers/mfd. But for many of these, the same
object file name was used for both the MFD and the regulator drivers.

Having 2 different drivers with the same name causes a lot of confusion
to Kbuild, specially if these are built as module since only one module
will be installed and also exported symbols will be undefined due being
overwritten by the other module during modpost.

For example, it fixes the following issue when both drivers are module:

$ make M=drivers/regulator/
  ...
  CC [M]  drivers/regulator//max14577.o
  Building modules, stage 2.
  MODPOST 1 modules
WARNING: "maxim_charger_calc_reg_current" [drivers/regulator//max14577.ko] undefined!
WARNING: "maxim_charger_currents" [drivers/regulator//max14577.ko] undefined!

Reported-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 19:39:17 +01:00
Javier Martinez Canillas 5e3ca2b349 regulator: Try to resolve regulators supplies on registration
Commit 6261b06de5 ("regulator: Defer lookup of supply to regulator_get")
moved the regulator supplies lookup logic from the regulators registration
to the regulators get time.

Unfortunately, that changed the behavior of the regulator core since now a
parent supply with a child regulator marked as always-on, won't be enabled
unless a client driver attempts to get the child regulator during boot.

This patch tries to resolve the parent supply for the already registered
regulators each time that a new regulator is registered. So the regulators
that have child regulators marked as always on will be enabled regardless
if a driver gets the child regulator or not.

That was the behavior before the mentioned commit, since parent supplies
were looked up at regulator registration time instead of during child get.

Since regulator_resolve_supply() checks for rdev->supply, most of the times
it will be a no-op. Errors aren't checked to keep the possible out of order
dependencies which was the motivation for the mentioned commit.

Also, the supply being available will be enforced on regulator get anyways
in case the resolve fails on regulators registration.

Fixes: 6261b06de5 ("regulator: Defer lookup of supply to regulator_get")
Suggested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org> # 4.1+
2016-03-28 10:42:45 +01:00
Stephen Boyd 6ee5c04407 regulator: qcom_spmi: Keep trying to add regulators if read fails
On some designs, a handful of the regulators can't be read via
SPMI transactions because they're "secure" and not intended to be
touched by non-secure processors. This driver unconditionally
attempts to read the id registers of all the regulators though,
leading to probe failing and no regulators being registered.
Let's ignore any errors from failing to read the registers and
keep adding other regulators so that this driver can probe on
such devices.

Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 10:41:02 +01:00
Stephen Boyd 50314e55a1 regulator: qcom_spmi: Add support for pm8994
Document the regulators available on pm8994 and add support for
this PMIC to the SPMI PMIC regulator driver.

Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 10:41:02 +01:00
Ivaylo Dimitrov 32e5deac36 regulator: twl: Regulator mode should not depend on regulator enabled state
When machine constraints are applied, regulator framework first sets
initial mode (if any) and then enables the regulator if needed. The current
code in twl4030reg_set_mode always checks if the regulator is enabled
before applying the mode. That results in -EACCES error returned for
"always-on" regulators which have "initial-mode" set in the board DTS. Fix
that by removing the unneeded check.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 10:39:58 +01:00
Ivaylo Dimitrov 2330b05c09 regulator: twl: Make sure we have access to powerbus before trying to write to it
According to the TRM, we need to enable i2c access to powerbus before
writing to it. Also, a new write to powerbus should not be attempted if
there is a pending transfer. The current code does not implement that
functionality and while there are no known problems caused by that, it is
better to follow what TRM says.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-28 10:39:58 +01:00
Krzysztof Kozlowski 3b67262307 regulator: s2mps11: Fix invalid selector mask and voltages for buck9
The buck9 regulator of S2MPS11 PMIC had incorrect vsel_mask (0xff
instead of 0x1f) thus reading entire register as buck9's voltage. This
effectively caused regulator core to interpret values as higher voltages
than they were and then to set real voltage much lower than intended.

The buck9 provides power to other regulators, including LDO13
and LDO19 which supply the MMC2 (SD card). On Odroid XU3/XU4 the lower
voltage caused SD card detection errors on Odroid XU3/XU4:
	mmc1: card never left busy state
	mmc1: error -110 whilst initialising SD card

During driver probe the regulator core was checking whether initial
voltage matches the constraints. With incorrect vsel_mask of 0xff and
default value of 0x50, the core interpreted this as 5 V which is outside
of constraints (3-3.775 V). Then the regulator core was adjusting the
voltage to match the constraints. With incorrect vsel_mask this new
voltage mapped to a vere low voltage in the driver.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>
2016-03-28 10:36:30 +01:00
Mark Brown fa93fd4ecc regulator: core: Ensure we are at least in bounds for our constraints
Currently we only attempt to set the voltage during constraints
application if an exact voltage is specified.  Extend this so that if
the currently set voltage for the regulator is outside the bounds set in
constraints we will move the voltage to the nearest constraint, raising
to the minimum or lowering to the maximum as needed.  This ensures that
drivers can probe without the hardware being driven out of spec.

Reported-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Tested-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-27 10:02:43 +01:00
Vladimir Zapolskiy e437b90026 regulator: core: Remove duplicate copy of active-discharge parsing
Apparently due to a wrongly resolved merge conflict between two
branches, which contained the same commit, the commit contents
partially was added two times in a row.

This change reverts the latter wrong inclusion of commit 909f7ee0b5
("regulator: core: Add support for active-discharge configuration").

The first applied commit 670666b9e0 ("regulator: core: Add support
for active-discharge configuration") is not touched.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-25 11:12:33 +00:00
Mark Brown 895fe2321e regulator: core: Always flag voltage constraints as appliable
Allow the core to always use the voltage constraints to set the voltage
on startup.  A forthcoming change in that code will ensure that we bring
out of constraints voltages into spec with this setting.

Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-22 10:30:12 +00:00
Maarten ter Huurne e6e79fd9ce regulator: act8865: Remove "too many regulators" error handler
The check would dereference pdata, which can be NULL in the non-DT
use case.

Nothing will break if pdata->num_regulators is larger than the number
of regulators that the driver defines: pdata->num_regulators is only
read in act8865_get_init_data() to iterate through pdata->regulators.

The error handler might have some value as a sanity check on the
platform data, but the platform data could be broken in many other
ways that are not checked for (unknown IDs, duplicate IDs), so I see
no reason to perform only this specific check.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-21 17:52:07 +00:00
Maarten ter Huurne de14ba6737 regulator: act8865: Remove redundant dev lookups
The local variable "dev" already contains a pointer to the device,
so there is no need to take the address of "client->dev" again.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-21 17:52:07 +00:00
Javier Martinez Canillas 95a293c7ba regulator: Remove unneded check for regulator supply
The regulator_resolve_supply() function checks if a supply has been
associated with a regulator to avoid enabling it if that is not the
case.

But the supply was already looked up with regulator_resolve_supply()
and set with set_supply() before the check and both return on error.

So the fact that this statement has been reached means that neither
of them failed and a supply must be associated with the regulator.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-21 13:35:30 +00:00
Linus Torvalds 12e7b0a627 - New Drivers
- Freescale Touch Screen ADC
    - X-Powers AXP PMIC with RSB
    - TI TPS65086 Power Management IC (PMIC)
  - New Device Support
    - Supply device PCI IDs for Intel Broxton
  - Fix-ups
    - Move to clkdev_create() API; intel_quark_i2c_gpio
    - Complete re-write of TI's TPS65912 Power Management IC (PMIC)
    - Remove unnecessary function argument; axp20x
    - Separate out bus related code; axp20x
    - Coding Style changes; axp20x
    - Allow more drivers to be compiled as modules
    - Work around false positive 'used uninitialised' warning; db8500-prcmu
  - Bug Fixes
    - Remove do_div(); fsl-imx25-gcq
    - Fix driver init when built-in; tps65010
    - Fix clock-unregister leak; intel-lpss
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Merge tag 'mfd-for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers:
   - Freescale Touch Screen ADC
   - X-Powers AXP PMIC with RSB
   - TI TPS65086 Power Management IC (PMIC)

  New Device Support:
   - Supply device PCI IDs for Intel Broxton

  Fix-ups:
   - Move to clkdev_create() API; intel_quark_i2c_gpio
   - Complete re-write of TI's TPS65912 Power Management IC (PMIC)
   - Remove unnecessary function argument; axp20x
   - Separate out bus related code; axp20x
   - Coding Style changes; axp20x
   - Allow more drivers to be compiled as modules
   - Work around false positive 'used uninitialised' warning; db8500-prcmu

  Bug Fixes:
   - Remove do_div(); fsl-imx25-gcq
   - Fix driver init when built-in; tps65010
   - Fix clock-unregister leak; intel-lpss"

* tag 'mfd-for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (53 commits)
  mfd: intel-lpss: Pass I2C configuration via properties on BXT
  mfd: imx6sx: Add PCIe register definitions for iomuxc gpr
  mfd: ipaq-micro: Use __maybe_unused to hide pm functions
  mfd: max77686: Add max77802 to I2C device ID table
  mfd: max77686: Export OF module alias information
  mfd: max77686: Allow driver to be built as a module
  mfd: stmpe: Add the proper PWM resources
  mfd: tps65090: Set regmap config reg counts properly
  mfd: syscon: Return ENOTSUPP instead of ENOSYS when disabled
  mfd: as3711: Set regmap config reg counts properly
  mfd: rc5t583: Set regmap config reg counts properly
  gpio: tps65086: Add GPO driver for the TPS65086 PMIC
  mfd: mt6397: Add platform device ID table
  mfd: da9063: Fix missing volatile registers in the core regmap_range volatile lists
  mfd: mt6397: Add MT6323 support to MT6397 driver
  mfd: mt6397: Add support for different Slave types
  mfd: mt6397: int_con and int_status may vary in location
  dt-bindings: mfd: Add bindings for the MediaTek MT6323 PMIC
  mfd: da9062: Fix missing volatile registers in the core regmap_range volatile lists
  mfd: Add documentation for ACT8945A DT bindings
  ...
2016-03-18 10:15:11 -07:00
Linus Torvalds 1a46712aa9 This is the bulk of GPIO changes for kernel v4.6:
Core changes:
 
 - The gpio_chip is now a *real device*. Until now the gpio chips
   were just piggybacking the parent device or (gasp) floating in
   space outside of the device model. We now finally make GPIO chips
   devices. The gpio_chip will create a gpio_device which contains
   a struct device, and this gpio_device struct is kept private.
   Anything that needs to be kept private from the rest of the kernel
   will gradually be moved over to the gpio_device.
 
 - As a result of making the gpio_device a real device, we have added
   resource management, so devm_gpiochip_add_data() will cut down on
   overhead and reduce code lines. A huge slew of patches convert
   almost all drivers in the subsystem to use this.
 
 - Building on making the GPIO a real device, we add the first step
   of a new userspace ABI: the GPIO character device. We take small
   steps here, so we first add a pure *information* ABI and the tool
   "lsgpio" that will list all GPIO devices on the system and all
   lines on these devices. We can now discover GPIOs properly from
   userspace. We still have not come up with a way to actually *use*
   GPIOs from userspace.
 
 - To encourage people to use the character device for the future,
   we have it always-enabled when using GPIO. The old sysfs ABI is
   still opt-in (and can be used in parallel), but is marked as
   deprecated. We will keep it around for the foreseeable future,
   but it will not be extended to cover ever more use cases.
 
 Cleanup:
 
 - Bjorn Helgaas removed a whole slew of per-architecture <asm/gpio.h>
   includes. This dates back to when GPIO was an opt-in feature and
   no shared library even existed: just a header file with proper
   prototypes was provided and all semantics were up to the arch to
   implement. These patches make the GPIO chip even more a proper
   device and cleans out leftovers of the old in-kernel API here
   and there. Still some cruft is left but it's very little now.
 
 - There is still some clamping of return values for .get() going
   on, but we now return sane values in the vast majority of drivers
   and the errorpath is sanitized. Some patches for powerpc, blackfin
   and unicore still drop in.
 
 - We continue to switch the ARM, MIPS, blackfin, m68k local GPIO
   implementations to use gpiochip_add_data() and cut down on code
   lines.
 
 - MPC8xxx is converted to use the generic GPIO helpers.
 
 - ATH79 is converted to use the generic GPIO helpers.
 
 New drivers:
 
 - WinSystems WS16C48
 
 - Acces 104-DIO-48E
 
 - F81866 (a F7188x variant)
 
 - Qoric (a MPC8xxx variant)
 
 - TS-4800
 
 - SPI serializers (pisosr): simple 74xx shift registers connected
   to SPI to obtain a dirt-cheap output-only GPIO expander.
 
 - Texas Instruments TPIC2810
 
 - Texas Instruments TPS65218
 
 - Texas Instruments TPS65912
 
 - X-Gene (ARM64) standby GPIO controller
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Merge tag 'gpio-v4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for kernel v4.6.  There is quite a
  lot of interesting stuff going on.

  The patches to other subsystems and arch-wide are ACKed as far as
  possible, though I consider things like per-arch <asm/gpio.h> as
  essentially a part of the GPIO subsystem so it should not be needed.

  Core changes:

   - The gpio_chip is now a *real device*.  Until now the gpio chips
     were just piggybacking the parent device or (gasp) floating in
     space outside of the device model.

     We now finally make GPIO chips devices.  The gpio_chip will create
     a gpio_device which contains a struct device, and this gpio_device
     struct is kept private.  Anything that needs to be kept private
     from the rest of the kernel will gradually be moved over to the
     gpio_device.

   - As a result of making the gpio_device a real device, we have added
     resource management, so devm_gpiochip_add_data() will cut down on
     overhead and reduce code lines.  A huge slew of patches convert
     almost all drivers in the subsystem to use this.

   - Building on making the GPIO a real device, we add the first step of
     a new userspace ABI: the GPIO character device.  We take small
     steps here, so we first add a pure *information* ABI and the tool
     "lsgpio" that will list all GPIO devices on the system and all
     lines on these devices.

     We can now discover GPIOs properly from userspace.  We still have
     not come up with a way to actually *use* GPIOs from userspace.

   - To encourage people to use the character device for the future, we
     have it always-enabled when using GPIO.  The old sysfs ABI is still
     opt-in (and can be used in parallel), but is marked as deprecated.

     We will keep it around for the foreseeable future, but it will not
     be extended to cover ever more use cases.

  Cleanup:

   - Bjorn Helgaas removed a whole slew of per-architecture <asm/gpio.h>
     includes.

     This dates back to when GPIO was an opt-in feature and no shared
     library even existed: just a header file with proper prototypes was
     provided and all semantics were up to the arch to implement.  These
     patches make the GPIO chip even more a proper device and cleans out
     leftovers of the old in-kernel API here and there.

     Still some cruft is left but it's very little now.

   - There is still some clamping of return values for .get() going on,
     but we now return sane values in the vast majority of drivers and
     the errorpath is sanitized.  Some patches for powerpc, blackfin and
     unicore still drop in.

   - We continue to switch the ARM, MIPS, blackfin, m68k local GPIO
     implementations to use gpiochip_add_data() and cut down on code
     lines.

   - MPC8xxx is converted to use the generic GPIO helpers.

   - ATH79 is converted to use the generic GPIO helpers.

  New drivers:

   - WinSystems WS16C48

   - Acces 104-DIO-48E

   - F81866 (a F7188x variant)

   - Qoric (a MPC8xxx variant)

   - TS-4800

   - SPI serializers (pisosr): simple 74xx shift registers connected to
     SPI to obtain a dirt-cheap output-only GPIO expander.

   - Texas Instruments TPIC2810

   - Texas Instruments TPS65218

   - Texas Instruments TPS65912

   - X-Gene (ARM64) standby GPIO controller"

* tag 'gpio-v4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (194 commits)
  Revert "Share upstreaming patches"
  gpio: mcp23s08: Fix clearing of interrupt.
  gpiolib: Fix comment referring to gpio_*() in gpiod_*()
  gpio: pca953x: Fix pca953x_gpio_set_multiple() on 64-bit
  gpio: xgene: Fix kconfig for standby GIPO contoller
  gpio: Add generic serializer DT binding
  gpio: uapi: use 0xB4 as ioctl() major
  gpio: tps65912: fix bad merge
  Revert "gpio: lp3943: Drop pin_used and lp3943_gpio_request/lp3943_gpio_free"
  gpio: omap: drop dev field from gpio_bank structure
  gpio: mpc8xxx: Slightly update the code for better readability
  gpio: mpc8xxx: Remove *read_reg and *write_reg from struct mpc8xxx_gpio_chip
  gpio: mpc8xxx: Fixup setting gpio direction output
  gpio: mcp23s08: Add support for mcp23s18
  dt-bindings: gpio: altera: Fix altr,interrupt-type property
  gpio: add driver for MEN 16Z127 GPIO controller
  gpio: lp3943: Drop pin_used and lp3943_gpio_request/lp3943_gpio_free
  gpio: timberdale: Switch to devm_ioremap_resource()
  gpio: ts4800: Add IMX51 dependency
  gpiolib: rewrite gpiodev_add_to_list
  ...
2016-03-17 21:05:32 -07:00
Mihai Mihalache 8d48794bb3 regulator: gpio: check return value of of_get_named_gpio
At boot time the regulator driver can be initialized before the
gpio, in which case the call to of_get_named_gpio will return
EPROBE_DEFER. This value is silently passed to regulator_register
which will return success, although the gpio is not registered
(regulator_ena_gpio_request not called) as the value passed is
detected as invalid. The gpio_regulator_probe will therefore
succeed win no gpio requested.

Signed-off-by: Mihai Mihalache <mihai.d.mihalache@intel.com>
Reviewed-by: Hans Holmberg <hans.holmberg@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-17 11:44:57 +00:00
Laxman Dewangan 5bf59bd5e9 regulator: pwm: Prints error number along with detail
Prints the error number along with error message when any
error occurs. This help on getting the reason of failure
quickly from log without any code instrument.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-15 08:51:28 +00:00
Mark Brown 768e66686c Merge remote-tracking branches 'regulator/topic/s5m8767' and 'regulator/topic/vexpress' into regulator-next 2016-03-13 15:20:14 +07:00
Mark Brown 41eeb34acd Merge remote-tracking branches 'regulator/topic/mt6397', 'regulator/topic/of', 'regulator/topic/pv88060', 'regulator/topic/pwm' and 'regulator/topic/s2mps11' into regulator-next 2016-03-13 15:20:00 +07:00
Mark Brown d6d50a8f17 Merge remote-tracking branches 'regulator/topic/ltc3589', 'regulator/topic/max77620', 'regulator/topic/max77686', 'regulator/topic/max77802' and 'regulator/topic/maxim' into regulator-next 2016-03-13 15:19:47 +07:00
Mark Brown d1f83021d5 Merge remote-tracking branches 'regulator/topic/discharge', 'regulator/topic/fan53555', 'regulator/topic/gpio', 'regulator/topic/hi655x' and 'regulator/topic/lp872x' into regulator-next 2016-03-13 15:19:35 +07:00
Mark Brown 92aa18f88c Merge remote-tracking branches 'regulator/topic/act8865', 'regulator/topic/act8945a', 'regulator/topic/axp20x' and 'regulator/topic/cs4271' into regulator-next 2016-03-13 15:19:24 +07:00
Mark Brown c155e0ab13 Merge remote-tracking branch 'regulator/topic/core' into regulator-next 2016-03-13 15:19:22 +07:00
Mark Brown 905373b637 Merge remote-tracking branches 'regulator/fix/ad5398', 'regulator/fix/da9210', 'regulator/fix/max77802' and 'regulator/fix/pv88090' into regulator-linus 2016-03-13 15:19:09 +07:00
Laxman Dewangan f907a0a949 regulator: pwm: Add support to have multiple instance of pwm regulator
Some of platforms like Nvidia's Tegra210 Jetson-TX1 platform has
multiple PMW based regulators. Add support to have multiple instances
of the driver by not changing any global data of pwm regulator and
if required, making instance specific copy and then making changes.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-12 13:07:13 +07:00
Laxman Dewangan 1aaab34878 regulator: pwm: Fix calculation of voltage-to-duty cycle
With following equation for calculating
voltage_to_duty_cycle_percentage
	100 - (((req_uV * 100) - (min_uV * 100)) / diff);

we get 0% for max_uV and 100% for min_uV.

Correcting this to
	((req_uV * 100) - (min_uV * 100)) / diff;
 to get proper duty cycle.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-12 13:07:09 +07:00
Laxman Dewangan a34785f10d regulator: of: Use of_property_read_u32() for reading min/max
OF interface provides to read the u32 value via standard interface
of_property_read_u32(). Use this API to read "regulator-min-microvolts"
and "regulator-max-microvolt".

This will make consistent with other property value reads.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-12 12:59:33 +07:00
Lee Jones bab070620e Merge branches 'ib-mfd-clk-4.6', 'ib-mfd-input-iio-4.6', 'ib-mfd-regulator-4.6' and 'ib-mfd-regulator-gpio-4.6' into ibs-for-mfd-merged 2016-03-09 12:56:47 +07:00
James Ban a7c2ded696 regulator: pv88060: fix incorrect clear of event register
This is a patch to fix incorrect clear of event register.

Signed-off-by: James Ban <James.Ban.opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-08 14:17:54 +07:00
James Ban 623f7b9339 regulator: pv88090: fix incorrect clear of event register
This is a patch to fix incorrect clear of event register.

Signed-off-by: James Ban <James.Ban.opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-07 14:39:03 +07:00
Laxman Dewangan 51817f468f regulator: max77620: Add support to configure active-discharge
Add regulator ops callback for configuration of active-discharge
and provide necessarily information via regulator descriptor.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-02 23:31:45 +09:00
Laxman Dewangan 909f7ee0b5 regulator: core: Add support for active-discharge configuration
Add support to enable/disable active discharge of regulator via
machine constraints. This configuration is done when setting
machine constraint during regulator register and if regulator
driver implemented the callback ops.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-02 23:31:45 +09:00
Mark Brown 07a06694cb Merge branch 'topic/discharge' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-max77620 2016-03-02 23:31:35 +09:00
Laxman Dewangan 354794dacc regulator: helper: Add helper to configure active-discharge using regmap
Add helper function to set the state of active-discharge of
regulator using regmap. The HW regulator driver can directly
use this by providing the necessary information in the regulator
descriptor.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-02 23:13:05 +09:00
Laxman Dewangan 670666b9e0 regulator: core: Add support for active-discharge configuration
Add support to enable/disable active discharge of regulator via
machine constraints. This configuration is done when setting
machine constraint during regulator register and if regulator
driver implemented the callback ops.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-02 23:13:05 +09:00
Maarten ter Huurne 79b5d0266a regulator: act8865: Specify fixed voltage of 3.3V for ACT8600's REG9
The documentation lists both 1.8V and 3.3V for this regulator output,
but 3.3V is mentioned more often and also matches what JZ4770 and
JZ4780 expect as an input.

Note that the voltage of REG9 is not programmable, so this commit only
changes the voltage reported in sysfs and debugfs, not the actual
output voltage of the hardware.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-29 20:33:46 +09:00
Maarten ter Huurne 30f065bf1f regulator: act8865: Rename platform_data field to init_data
Make the field name match its type.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-29 20:33:46 +09:00
Maarten ter Huurne abea1bb08c regulator: act8865: Remove "static" from local variable
There is no need to preserve its value between calls. I guess this
was a copy-paste slip-up.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-29 20:33:44 +09:00
Axel Lin 4d92325125 regulator: max77620: Remove duplicate module alias
The same alias is already in .id_table.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-26 10:36:54 +09:00
Axel Lin aad76f743b regulator: max77620: Eliminate duplicate code
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-26 10:36:54 +09:00
Axel Lin 47dbdbf64f regulator: max77620: Remove unused fields
These fields are never used and not required at all, remove them.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-26 10:36:54 +09:00
Krzysztof Adamski 32165230eb regulator: core: fix crash in error path of regulator_register
This problem was introduced by:
commit daad134d66 ("regulator: core: Request GPIO before creating
sysfs entries")

The error path was not updated correctly after moving GPIO registration
code and in case regulator_ena_gpio_free failed, device_unregister() was
called even though device_register() was not yet called.

This problem breaks the boot at least on all Tegra 32-bit devices. It
will also crash each device that specifices GPIO that is unavaiable at
regulator_register call. Here's error log I've got when forced GPIO to
be invalid:

[    1.116612] usb-otg-vbus-reg: Failed to request enable GPIO10: -22
[    1.122794] Unable to handle kernel NULL pointer dereference at
virtual address 00000044
[    1.130894] pgd = c0004000
[    1.133598] [00000044] *pgd=00000000
[    1.137205] Internal error: Oops: 5 [#1] SMP ARM

and here's backtrace from KDB:

Exception stack(0xef11fbd0 to 0xef11fc18)
fbc0:                                     00000000 c0738a14 00000000 00000000
fbe0: c0b2a0b0 00000000 00000000 c0738a14 c0b5fdf8 00000001 ef7f6074 ef11fc4c
fc00: ef11fc50 ef11fc20 c02a8344 c02a7f1c 60000013 ffffffff
[<c010cee0>] (__dabt_svc) from [<c02a7f1c>] (kernfs_find_ns+0x18/0xf8)
[<c02a7f1c>] (kernfs_find_ns) from [<c02a8344>] (kernfs_find_and_get_ns+0x40/0x58)
[<c02a8344>] (kernfs_find_and_get_ns) from [<c02ac4a4>] (sysfs_unmerge_group+0x28/0x68)
[<c02ac4a4>] (sysfs_unmerge_group) from [<c044389c>] (dpm_sysfs_remove+0x30/0x5c)
[<c044389c>] (dpm_sysfs_remove) from [<c0436ba8>] (device_del+0x48/0x1f4)
[<c0436ba8>] (device_del) from [<c0436d84>] (device_unregister+0x30/0x6c)
[<c0436d84>] (device_unregister) from [<c0403910>] (regulator_register+0x6d0/0xdac)
[<c0403910>] (regulator_register) from [<c04052d4>] (devm_regulator_register+0x50/0x84)
[<c04052d4>] (devm_regulator_register) from [<c0406298>] (reg_fixed_voltage_probe+0x25c/0x3c0)
[<c0406298>] (reg_fixed_voltage_probe) from [<c043d21c>] (platform_drv_probe+0x60/0xb0)
[<c043d21c>] (platform_drv_probe) from [<c043b078>] (driver_probe_device+0x24c/0x440)
[<c043b078>] (driver_probe_device) from [<c043b5e8>] (__device_attach_driver+0xc0/0x120)
[<c043b5e8>] (__device_attach_driver) from [<c043901c>] (bus_for_each_drv+0x6c/0x98)
[<c043901c>] (bus_for_each_drv) from [<c043ad20>] (__device_attach+0xac/0x138)
[<c043ad20>] (__device_attach) from [<c043b664>] (device_initial_probe+0x1c/0x20)
[<c043b664>] (device_initial_probe) from [<c043a074>] (bus_probe_device+0x94/0x9c)
[<c043a074>] (bus_probe_device) from [<c043a610>] (deferred_probe_work_func+0x80/0xcc)
[<c043a610>] (deferred_probe_work_func) from [<c01381d0>] (process_one_work+0x158/0x454)
[<c01381d0>] (process_one_work) from [<c013854c>] (worker_thread+0x38/0x510)
[<c013854c>] (worker_thread) from [<c013e154>] (kthread+0xe8/0x104)
[<c013e154>] (kthread) from [<c0108638>] (ret_from_fork+0x14/0x3c)

Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com>
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-25 10:48:16 +09:00
Mark Brown ece497ae37 Merge branch 'fix/core' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-core 2016-02-25 10:48:11 +09:00
Krzysztof Adamski daad134d66 regulator: core: Request GPIO before creating sysfs entries
regulator_attr_is_visible (which is a .is_visible callback of
regulator_dev_group attribute_grpup) checks rdev->ena_pin to decide if
"status" file should be present in sysfs. This field is set at the end
of regulator_ena_gpio_request so it has to be called before
device_register() otherwise this test will always fail, causing "status"
file to not be visible.

Since regulator_attr_is_visible also tests for is_enabled() op, this
problem is only visible for regulators that does not define this
callback, like regulator-fixed.c.

Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-22 19:51:05 +09:00
Rabin Vincent 0258382bf3 regulator: gpio: don't print error on EPROBE_DEFER
Don't print out an error with the driver sees EPROBE_DEFER when
attempting to get the gpio.  These errors are usually transient; the
probe will be retried later.

Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-21 02:09:34 +09:00
Krzysztof Kozlowski 7ddec64121 regulator: s2mps11: Use local variable for number of regulators
Remove the s2mps11_info.rdev_num because it is not used outside of
probe.

Suggested-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-20 01:07:40 +09:00
Axel Lin 4434cee9b6 regulator: ad5398: Fix return value of ad5398_write_reg
i2c_master_send() returns the number of bytes written on success.
So current code returns 2 if ad5398_write_reg() success.
This return value is propagated to .set_current_limit, .enable and .disable
callbacks of regulator_ops. This can be a problem, for example, if the
users test if the return value of regulator_set_current_limit() is 0.
Fix it by making ad5398_write_reg() return 0 on success.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-20 01:02:34 +09:00
Laxman Dewangan 5b1c20286f regulator: max77620: add regulator driver for max77620/max20024
MAXIM Semiconductor's PMIC, MAX77620 and MAX20024 have the
multiple DCDC and LDOs. This supplies the power to different
components of the system.
Also these rails has configuration for ramp time, flexible
power sequence, slew rate etc.

Add regulator driver to access these rails via regulator APIs.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mallikarjun Kasoju <mkasoju@nvidia.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-20 01:01:17 +09:00
Krzysztof Kozlowski 297eaaa6d0 regulator: s2mps11: Simplify expression used in BUILD_BUG_ON
Following BUILD_BUG_ON using a variable fails for some of the compilers
and optimization levels (reported for gcc 4.9):
	var = ARRAY_SIZE(s2mps15_regulators);
	BUILD_BUG_ON(S2MPS_REGULATOR_MAX < var);
Fix this by using ARRAY_SIZE directly.

Additionally add missing BUILD_BUG_ON check for S2MPS15 device (the
check ensures that internal arrays are big enough to hold data for all
of regulators on all devices).

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-18 13:34:26 +00:00
Arnd Bergmann e07ff94341 regulator: s5m8767: fix get_register() error handling
The s5m8767_pmic_probe() function calls s5m8767_get_register() to
read data without checking the return code, which produces a compile-time
warning when that data is accessed:

drivers/regulator/s5m8767.c: In function 's5m8767_pmic_probe':
drivers/regulator/s5m8767.c:924:7: error: 'enable_reg' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/regulator/s5m8767.c:944:30: error: 'enable_val' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This changes the s5m8767_get_register() function to return a -EINVAL
not just for an invalid register number but also for an invalid
regulator number, as both would result in returning uninitialized
data. The s5m8767_pmic_probe() function is then changed accordingly
to fail on a read error, as all the other callers of s5m8767_get_register()
already do.

In practice this probably cannot happen, as we don't call
s5m8767_get_register() with invalid arguments, but the gcc
warning seems valid in principle, in terms writing safe
error checking.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 9c4c60554a ("regulator: s5m8767: Convert to use regulator_[enable|disable|is_enabled]_regmap")
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-16 17:08:59 +00:00
Sudeep Holla 935514c961 regulator: vexpress: rename vexpress regulator implementation
The vexpress regulator implementation is currently just called vexpress.
This is a problem because it clashes with another module with the same
name in hardware monitors.

This patch renames the vexpress regulator implementation to
vexpress-regulator so that there will be no clash in the module namespace.

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Reported-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-15 21:01:52 +00:00
Chen-Yu Tsai e0bbb38c2f regulator: axp20x: Use of_match name as default regulator name
Originally the helper macros used uppercase regulator names, which
are primarily used to expand to the regulator ID enum, as the default
names. This is aestheticly unpleasent.

Since the of_match bits are the same, just lowercase, use that as the
default names instead.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-15 20:02:43 +00:00
Chen Feng 4618119b9b regulator: hi655x: enable regulator for hi655x PMIC
Add the regulator driver for hi655x PMIC.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Fei Wang <w.f@huawei.com>
Signed-off-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Reviewed-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-15 19:54:55 +00:00
Bernhard Walle d4930cf0ae regulator: ltc3589: Make IRQ optional
It's perfectly valid to use the LTC3589 without an interrupt pin
connected to it. Currently, the driver probing fails when client->irq
is 0 (which means "no interrupt"). Don't register the interrupt
handler in that case but successfully finish the device probing instead.

Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-12 22:35:00 +00:00
Javier Martinez Canillas 96173cc6a4 regulator: Rename files for max77686 and max77802 drivers
The max77686 and max77802 regulator drivers are for sub-devices of a MFD
driver for some PMIC blocks. But the same object file name (max77686.o)
was used for both the common MFD driver and the max77686 regulator one.

This confuses kbuild if both drivers are built as module causing the MFD
driver to not be copied when installing the modules.

Also, max77{686,802} are a quite generic name for MFD subdevices drivers
so it is better to rename them to max77{686,802}-regulator like it's the
case for most regulator drivers.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-12 12:15:51 +00:00
Chen-Yu Tsai 04e0981c67 regulator: axp20x: Support new AXP223 PMIC
The AXP223 is a new PMIC commonly paired with Allwinner A23/A33 SoCs.
It is functionally identical to AXP221; only the regulator default
voltage/status and the external host interface are different.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-02-12 08:55:34 +00:00
Andrew F. Davis 33f9d8c0b4 regulator: tps65912: Add regulator driver for the TPS65912 PMIC
This patch adds support for TPS65912 PMIC regulators.

The regulators set consists of 4 DCDCs and 10 LDOs. The output
voltages are configurable and are meant to supply power to the
main processor and other components.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-02-11 16:31:06 +00:00
Andrew F. Davis 65b6555971 mfd: tps65912: Remove old driver in preparation for new driver
The old tps65912 driver is being replaced, delete old driver.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-02-11 16:30:31 +00:00
Paul Kocialkowski 7e6213f434 regulator: lp872x: Add enable GPIO pin support
LP872x regulators are made active via the EN pin, which might be hooked to a
GPIO. This adds support for driving the GPIO high when the driver is in use.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-05 18:57:09 +00:00
Paul Kocialkowski 690f44badf regulator: lp872x: Remove warning about invalid DVS GPIO
Some devices don't hook the DVS pin to a GPIO but to ground or VCC.
In those cases, it is not a problem to have no DVS GPIO provided, as the current
code will already switch to software-only DVS selection:

When the DVS GPIO is invalid, lp872x_init_dvs jumps to the set_default_dvs_mode
label, which instructs the chip not to use the DVS pin at all and do it all in
software instead (by clearing the LP8720_EXT_DVS_M bit in the
LP872X_GENERAL_CFG register).

That is reflected later in the code, when setting the bucks (the DVS pin only
applies to the bucks) by checking for the LP8720_EXT_DVS_M bit on the
LP872X_GENERAL_CFG register (in lp872x_select_buck_vout_addr) to decide whether
to use software or hardware DVS selection.

Thus, there is no need to print a warning when the DVS GPIO is invalid.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-05 18:57:08 +00:00
Wenyou Yang 38c0996104 regulator: act8945a: add regulator driver for ACT8945A
This patch adds new regulator driver to support ACT8945A MFD
chip's regulators.

The ACT8945A has three step-down DC/DC converters and four
low-dropout regulators.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-05 18:18:47 +00:00
Chen-Yu Tsai 13d57e6435 regulator: axp20x: Use linear voltage ranges for AXP20X LDO4
AXP20X datasheet lists the possible voltage settings for LDO4, so
it was implemented using a voltage table. Upon closer examination,
the valid voltages can be mapped into 3 linear ranges.

Move AXP20X LDO4 to use linear ranges. The supporting code can be
reused with later AXP8xx PMICs, which have a number of regulators
that have 2 linear ranges.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-03 17:15:08 +00:00
Chen-Yu Tsai 94c39041ae regulator: axp20x: Remove voltage readout support for switch regulators
Switch-type regulators, such as DC1SW on AXP22X, are a secondary output
from DCDC1. They are just an on/off switch, and the driver should not
try to read its voltage directly from the DCDC1 control registers.

Instead, the core will pass down the voltage from the regulator supply
chain.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-03 17:15:08 +00:00
Javier Martinez Canillas abbf043b65 regulator: mt6397: Add OF match table
The Documentation/devicetree/bindings/regulator/mt6397-regulator.txt doc
mentions that a compatible "mediatek,mt6397-regulator" is required for
the MT6397 device node but the driver doesn't provide a OF match table so
the platform bus .match fallbacks to match using the driver name instead.

This also means that module auto-loading is broken for this driver since
the MFD driver that register the device, has a .of_compatible set so the
platform .uevent callback reports a OF modalias that's not in the module.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-27 15:29:07 +00:00
Javier Martinez Canillas 288a89bf43 regulator: mt6397: Add platform device ID table
The platform bus_type .match callback attempts to match the platform device
name with an entry on the .id_table if provided and fallbacks to match with
the driver's name if a table is not provided.

Using a platform device ID to match is more explicit, allows the driver to
support more than one device and also the MODULE_DEVICE_TABLE macro can be
used to export the module aliases information instead of the MODULE_ALIAS.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-27 15:29:07 +00:00
Charles Keepax 6333ef46bb regulator: core: Rely on regulator_dev_release to free constraints
As we now free the constraints in regulator_dev_release we will still
call free on the constraints pointer even if we went down an error
path in regulator_register, because it is only allocated after the
device_register. As such we no longer need to free rdev->constraints
on the error paths, so this patch removes said frees.

Fixes: 29f5f4860a ("regulator: core: Move more deallocation into class unregister")
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-27 14:41:42 +00:00
Linus Torvalds 4b43ea2a7c regulator: Update for v4.5
Aside from a fix for a spurious warning (which caused more problems than
 it fixed in the fixing really) this is all driver updates, including new
 drivers for Dialog PV88060/90 and TI LM363x and TPS65086 devices.  The
 qcom_smd driver has had PM8916 and PMA8084 support added.
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Merge tag 'regulator-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator updates from Mark Brown:
 "Aside from a fix for a spurious warning (which caused more problems
  than it fixed in the fixing really) this is all driver updates,
  including new drivers for Dialog PV88060/90 and TI LM363x and TPS65086
  devices.  The qcom_smd driver has had PM8916 and PMA8084 support
  added"

* tag 'regulator-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (36 commits)
  regulator: core: remove some dead code
  regulator: core: use dev_to_rdev
  regulator: lp872x: Get rid of duplicate reference to DVS GPIO
  regulator: lp872x: Add missing of_match in regulators descriptions
  regulator: axp20x: Fix GPIO LDO enable value for AXP22x
  regulator: lp8788: constify regulator_ops structures
  regulator: wm8*: constify regulator_ops structures
  regulator: da9*: constify regulator_ops structures
  regulator: mt6311: Use REGCACHE_RBTREE
  regulator: tps65917/palmas: Add bypass ops for LDOs with bypass capability
  regulator: qcom-smd: Add support for PMA8084
  regulator: qcom-smd: Add PM8916 support
  soc: qcom: documentation: Update SMD/RPM Docs
  regulator: pv88090: logical vs bitwise AND typo
  regulator: pv88090: Fix irq leak
  regulator: pv88090: new regulator driver
  regulator: wm831x-ldo: Use platform_register/unregister_drivers()
  regulator: wm831x-dcdc: Use platform_register/unregister_drivers()
  regulator: lp8788-ldo: Use platform_register/unregister_drivers()
  regulator: core: Fix nested locking of supplies
  ...
2016-01-15 12:14:47 -08:00
Wolfram Sang 0f48eedacf regulator: da9210: fix lockdep warning
Commit 70cfef2626 ("regulator: Add lockdep asserts to help detecting
locking misuse") successfully created this WARN, let's fix it:

[    1.218660] WARNING: CPU: 0 PID: 553 at drivers/regulator/core.c:3646 regulator_notifier_call_chain+0x5c/0x88()
...
[    1.220278] [<c0246c20>] (regulator_notifier_call_chain) from [<c02498b4>] (da9210_irq_handler+0x74/0x10c)
[    1.220412]  r7:c0080cac r6:eb1daa00 r5:e64bbf10 r4:00000002
[    1.220547] [<c0249840>] (da9210_irq_handler) from [<c0080cd8>] (irq_thread_fn+0x2c/0x44)
...

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-15 18:09:35 +00:00
zhangqing ab7cad3311 regulator: fan53555: fill set_suspend_enable/disable callback
Setting the set_suspend_enable/disable callback to support
enable and disable the dcdc when system is suspend.

Signed-off-by: zhangqing <zhangqing@rock-chips.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-15 18:08:20 +00:00
Mark Brown d3bd4e0a5f Merge remote-tracking branch 'regulator/topic/wm831x' into regulator-next 2016-01-12 18:26:12 +00:00
Mark Brown 78ae902552 Merge remote-tracking branches 'regulator/topic/pv88090', 'regulator/topic/qcom-smd', 'regulator/topic/tps6105x', 'regulator/topic/tps65086' and 'regulator/topic/tps65218' into regulator-next 2016-01-12 18:26:10 +00:00
Mark Brown 3fbd90bf6b Merge remote-tracking branches 'regulator/topic/lp8788', 'regulator/topic/mt6311', 'regulator/topic/optional', 'regulator/topic/palmas' and 'regulator/topic/pv88060' into regulator-next 2016-01-12 18:26:07 +00:00
Mark Brown 8bd31df8de Merge remote-tracking branches 'regulator/topic/const', 'regulator/topic/lm363x', 'regulator/topic/lockdep' and 'regulator/topic/lp872x' into regulator-next 2016-01-12 18:26:05 +00:00
Mark Brown 9fa295742d Merge remote-tracking branch 'regulator/topic/core' into regulator-next 2016-01-12 18:26:05 +00:00
Mark Brown 353915f0b4 Merge remote-tracking branches 'regulator/fix/axp20x' and 'regulator/fix/mt6311' into regulator-linus 2016-01-12 18:26:03 +00:00
Dan Carpenter 70dc6daff0 regulator: core: remove some dead code
Originally queue_delayed_work() used to negative error codes or 0 and 1
on success depending if the work was queued or not.  It caused a lot of
bugs where people treated all non-zero returns as failures so we changed
it to return bool instead in d4283e9378 ('workqueue: make queueing
functions return bool').  Now it never returns failure.

Checking for negative values causes a static checker warning since it is
impossible based on the bool type.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-07 15:41:02 +00:00
Geliang Tang 83080a1408 regulator: core: use dev_to_rdev
Use dev_to_rdev() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-05 14:20:50 +00:00
Paul Kocialkowski 8a99cc6ff5 regulator: lp872x: Get rid of duplicate reference to DVS GPIO
The lp872x structure holds a reference to the DVS GPIO, but it is never actually
used anywhere, since a first reference exists from the lp872x_dvs structure.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-23 12:12:46 +00:00
Paul Kocialkowski 1f97fe4777 regulator: lp872x: Add missing of_match in regulators descriptions
In order to select the regulators via of_find_regulator_by_node (and thus use
them in devicetree), defining of_match for each regulator is required.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-23 12:12:46 +00:00
Chen-Yu Tsai 3cb99e2ea9 regulator: axp20x: Fix GPIO LDO enable value for AXP22x
The enable/disable values for GPIO LDOs are reversed. It seems no one
noticed as AXP22x support was introduced recently, and no one was using
the GPIO LDOs, either because no designs actually use them or board
support hasn't caught up.

Fixes: 1b82b4e4f9 ("regulator: axp20x: Add support for AXP22X regulators")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-12-23 00:05:31 +00:00
Julia Lawall 95dfead1dd regulator: lp8788: constify regulator_ops structures
The regulator_ops structures are never modified, so declare them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-23 00:01:23 +00:00
Julia Lawall b0d6dd3ba3 regulator: wm8*: constify regulator_ops structures
The regulator_ops structures are never modified, so declare them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-23 00:00:00 +00:00
Julia Lawall 71242b49a0 regulator: da9*: constify regulator_ops structures
The regulator_ops structures are never modified, so declare them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-22 23:59:57 +00:00
Daniel Kurtz 47769cbc09 regulator: mt6311: Use REGCACHE_RBTREE
This regulator is on a slow i2c bus.  Register accesses are very simple,
they all either enable/disable a regulator channel, or select a new
voltage level.  Thus, reading registers from the device will always
return what was last written.

Therefore we can save a lot of time when reading registers by using a
regmap_cache.  Since the register map is relatively large, but we only
ever access a few of them, we use an RBTREE cache.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-18 12:14:27 +00:00
Keerthy b554e14506 regulator: tps65917/palmas: Add bypass ops for LDOs with bypass capability
set/get_bypass ops were missing for ldo1/ldo2 on tps65917 and
ldo9 on palmas/tps659038 which support bypass mode.
Adding the bypass ops helps consumers configure these ldos in
bypass mode or remove bypass mode if need be.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reported-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-16 19:22:42 +00:00
Andy Gross ee01d0c91e regulator: qcom-smd: Add support for PMA8084
This patch adds support and documentation for the PMA8084 regulators
found on APQ8084 platforms.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-16 12:29:54 +00:00
Andy Gross 57d6567680 regulator: qcom-smd: Add PM8916 support
This patch adds support and documentation for the PM8916 regulators
found on MSM8916 platforms.

Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-16 12:29:54 +00:00
Dan Carpenter d761c90617 regulator: pv88090: logical vs bitwise AND typo
These were supposed to be bitwise AND instead of logical.  Also kernel
style is for the operator to be on the first line and I removed some
extra parenthesis.

Fixes: c90456e36d ('regulator: pv88090: new regulator driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-12 22:34:08 +00:00
Axel Lin ecee988ac8 regulator: pv88090: Fix irq leak
Use devm_request_threaded_irq to ensure the irq is freed when unload the
module.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-12 22:34:08 +00:00
James Ban c90456e36d regulator: pv88090: new regulator driver
This is the driver for the Powerventure PV88090 BUCKs and LDOs regulator.
It communicates via an I2C bus to the device.

Signed-off-by: James Ban <James.Ban.opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-08 18:21:06 +00:00
Thierry Reding 92a513b79f regulator: wm831x-ldo: Use platform_register/unregister_drivers()
These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-02 19:37:31 +00:00
Thierry Reding 55e03e9c2d regulator: wm831x-dcdc: Use platform_register/unregister_drivers()
These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-02 19:37:22 +00:00