Граф коммитов

210 Коммитов

Автор SHA1 Сообщение Дата
Linus Torvalds e9a83bd232 It's been a relatively busy cycle for docs:
- A fair pile of RST conversions, many from Mauro.  These create more
    than the usual number of simple but annoying merge conflicts with other
    trees, unfortunately.  He has a lot more of these waiting on the wings
    that, I think, will go to you directly later on.
 
  - A new document on how to use merges and rebases in kernel repos, and one
    on Spectre vulnerabilities.
 
  - Various improvements to the build system, including automatic markup of
    function() references because some people, for reasons I will never
    understand, were of the opinion that :c:func:``function()`` is
    unattractive and not fun to type.
 
  - We now recommend using sphinx 1.7, but still support back to 1.4.
 
  - Lots of smaller improvements, warning fixes, typo fixes, etc.
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Merge tag 'docs-5.3' of git://git.lwn.net/linux

Pull Documentation updates from Jonathan Corbet:
 "It's been a relatively busy cycle for docs:

   - A fair pile of RST conversions, many from Mauro. These create more
     than the usual number of simple but annoying merge conflicts with
     other trees, unfortunately. He has a lot more of these waiting on
     the wings that, I think, will go to you directly later on.

   - A new document on how to use merges and rebases in kernel repos,
     and one on Spectre vulnerabilities.

   - Various improvements to the build system, including automatic
     markup of function() references because some people, for reasons I
     will never understand, were of the opinion that
     :c:func:``function()`` is unattractive and not fun to type.

   - We now recommend using sphinx 1.7, but still support back to 1.4.

   - Lots of smaller improvements, warning fixes, typo fixes, etc"

* tag 'docs-5.3' of git://git.lwn.net/linux: (129 commits)
  docs: automarkup.py: ignore exceptions when seeking for xrefs
  docs: Move binderfs to admin-guide
  Disable Sphinx SmartyPants in HTML output
  doc: RCU callback locks need only _bh, not necessarily _irq
  docs: format kernel-parameters -- as code
  Doc : doc-guide : Fix a typo
  platform: x86: get rid of a non-existent document
  Add the RCU docs to the core-api manual
  Documentation: RCU: Add TOC tree hooks
  Documentation: RCU: Rename txt files to rst
  Documentation: RCU: Convert RCU UP systems to reST
  Documentation: RCU: Convert RCU linked list to reST
  Documentation: RCU: Convert RCU basic concepts to reST
  docs: filesystems: Remove uneeded .rst extension on toctables
  scripts/sphinx-pre-install: fix out-of-tree build
  docs: zh_CN: submitting-drivers.rst: Remove a duplicated Documentation/
  Documentation: PGP: update for newer HW devices
  Documentation: Add section about CPU vulnerabilities for Spectre
  Documentation: platform: Delete x86-laptop-drivers.txt
  docs: Note that :c:func: should no longer be used
  ...
2019-07-09 12:34:26 -07:00
Mark Brown aaccf3863c
Merge branch 'regmap-5.3' into regmap-next 2019-07-04 17:33:59 +01:00
Thomas Gleixner d2912cb15b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:55 +02:00
Mauro Carvalho Chehab 458f69ef36 docs: timers: convert docs to ReST and rename to *.rst
The conversion here is really trivial: just a bunch of title
markups and very few puntual changes is enough to make it to
be parsed by Sphinx and generate a nice html.

The conversion is actually:
  - add blank lines and identation in order to identify paragraphs;
  - fix tables markups;
  - add some lists markups;
  - mark literal blocks;
  - adjust title markups.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-06-14 14:31:48 -06:00
Vitor Soares 6445500b43
regmap: add i3c bus support
Add basic support for i3c bus.
This is a simple implementation that only give support
for SDR Read and Write commands.

Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-07 13:09:55 +01:00
Matti Vaittinen a2d21848d9
regmap: regmap-irq: Add main status register support
There is bunch of devices with multiple logical blocks which
can generate interrupts. It's not a rare case that the interrupt
reason registers are arranged so that there is own status/ack/mask
register for each logical block. In some devices there is also a
'main interrupt register(s)' which can indicate what sub blocks
have interrupts pending.

When such a device is connected via slow bus like i2c the main
part of interrupt handling latency can be caused by bus accesses.
On systems where it is expected that only one (or few) sub blocks
have active interrupts we can reduce the latency by only reading
the main register and those sub registers which have active
interrupts. Support this with regmap-irq for simple cases where
main register does not require acking or masking.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-23 15:52:15 +00:00
Bartosz Golaszewski c82ea33ead
regmap: irq: add an option to clear status registers on unmask
Some interrupt controllers whose interrupts are acked on read will set
the status bits for masked interrupts without changing the state of
the IRQ line.

Some chips have an additional "feature" where if those set bits are
not cleared before unmasking their respective interrupts, the IRQ
line will change the state and we'll interpret this as an interrupt
although it actually fired when it was masked.

Add a new field to the irq chip struct that tells the regmap irq chip
code to always clear the status registers before actually changing the
irq mask values.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-19 18:38:13 +00:00
Matti Vaittinen 1c2928e3e3
regmap: regmap-irq/gpio-max77620: add level-irq support
Add level active IRQ support to regmap-irq irqchip. Change breaks
existing regmap-irq type setting. Convert the existing drivers which
use regmap-irq with trigger type setting (gpio-max77620) to work
with this new approach. So we do not magically support level-active
IRQs on gpio-max77620 - but add support to the regmap-irq for chips
which support them =)

We do not support distinguishing situation where HW supports rising
and falling edge detection but not both. Separating this would require
inventing yet another flags for IRQ types.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-19 18:35:45 +00:00
Bartosz Golaszewski bc998a7303
regmap: irq: handle HW using separate rising/falling edge interrupts
Some interrupt controllers use separate bits for controlling rising
and falling edge interrupts in the mask register i.e. they have one
interrupt for rising edge and one for falling.

We already handle the case where we have a single interrupt in the
mask register and a separate type configuration register.

Add a new switch to regmap_irq_chip which tells the framework to use
the mask_base address for configuring the edge of the interrupts that
define type_falling/rising_mask values.

For such interrupts we never update the type_base bits. For interrupts
that don't define type masks or their regmap irq chip doesn't set the
type_in_mask to true everything stays the same.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-13 17:07:46 +00:00
Tony Xie 43fac3238c
regmap: add a new macro:REGMAP_IRQ_REG_LINE(_id, _reg_bits)
if there are lots of irqs for a device and the register addresses for these
irqs is continuous, we can use this macro to initialize regmap_irq value.

Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-11-14 14:20:45 -08:00
Mark Brown ae2399c48c
Merge remote-tracking branches 'regmap/topic/noinc' and 'regmap/topic/single-rw' into regmap-next 2018-10-21 12:07:26 +01:00
Ben Whitten cdf6b11daa
regmap: Add regmap_noinc_write API
The regmap API had a noinc_read function added for instances where devices
supported returning data from an internal FIFO in a single read.

This commit adds the noinc_write variant to allow writing to a non
incrementing register, this is used in devices such as the sx1301 for
loading firmware.

Signed-off-by: Ben Whitten <ben.whitten@lairdtech.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-10-19 12:51:19 +01:00
David Frey 1c96a2f67c
regmap: split up regmap_config.use_single_rw
Split regmap_config.use_single_rw into use_single_read and
use_single_write. This change enables drivers of devices which only
support bulk operations in one direction to use the regmap_bulk_*()
functions for both directions and have their bulk operation split into
single operations only when necessary.

Update all struct regmap_config instances where use_single_rw==true to
instead set both use_single_read and use_single_write. No attempt was
made to evaluate whether it is possible to set only one of
use_single_read or use_single_write.

Signed-off-by: David Frey <dpfrey@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-09-07 13:03:55 +01:00
Mark Brown 1cbddedbed regmap: Support non-incrementing registers
Some devices have individual registers that don't autoincrement the
 register address during bulk reads but instead repeatedly read the same
 value, for example for monitoring GPIOs or ADCs.  Add support for these.
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Merge tag 'regmap-noinc-read' into regmap-4.19

regmap: Support non-incrementing registers

Some devices have individual registers that don't autoincrement the
register address during bulk reads but instead repeatedly read the same
value, for example for monitoring GPIOs or ADCs.  Add support for these.
2018-08-09 11:15:06 +01:00
Crestez Dan Leonard 74fe7b551f
regmap: Add regmap_noinc_read API
The regmap API usually assumes that bulk read operations will read a
range of registers but some I2C/SPI devices have certain registers for
which a such a read operation will return data from an internal FIFO
instead. Add an explicit API to support bulk read without range semantics.

Some linux drivers use regmap_bulk_read or regmap_raw_read for such
registers, for example mpu6050 or bmi150 from IIO. This only happens to
work because when caching is disabled a single regmap read op will map
to a single bus read op (as desired). This breaks if caching is enabled and
reg+1 happens to be a cacheable register.

Without regmap support refactoring a driver to enable regmap caching
requires separate I2C and SPI paths. This is exactly what regmap is
supposed to help avoid.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Crestez Dan Leonard <leonard.crestez@intel.com>
Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-09 11:00:15 +01:00
Akinobu Mita bcf7eac3d9
regmap: add SCCB support
This adds Serial Camera Control Bus (SCCB) support for regmap API that
is intended to be used by some of Omnivision sensor drivers.

The ov772x and ov9650 drivers are going to use this SCCB regmap API.

The ov772x driver was previously only worked with the i2c controller
drivers that support I2C_FUNC_PROTOCOL_MANGLING, because the ov772x
device doesn't support repeated starts.  After commit 0b964d183c
("media: ov772x: allow i2c controllers without
I2C_FUNC_PROTOCOL_MANGLING"), reading ov772x register is replaced with
issuing two separated i2c messages in order to avoid repeated start.
Using this SCCB regmap hides the implementation detail.

The ov9650 driver also issues two separated i2c messages to read the
registers as the device doesn't support repeated start.  So it can
make use of this SCCB regmap.

Cc: Mark Brown <broonie@kernel.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-18 15:45:23 +01:00
Srinivas Kandagatla ed24d568bd
regmap: add missing prototype for devm_init_slimbus
For some reason the devm variant of slimbus init is not added
into the header eventhough this __devm_regmap_init_slimbus()
is an exported function.

This patch adds this. This also fixes below warning in regmap-slimbus.c
regmap-slimbus.c:65:15: warning: symbol '__devm_regmap_init_slimbus'
 was not declared. Should it be static?
regmap-slimbus.c:65:16: warning: no previous prototype for
 '__devm_regmap_init_slimbus' [-Wmissing-prototypes]

Fixes: 7d6f7fb053 ("regmap: add SLIMbus support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-05-25 18:35:59 +01:00
Sean Wang f15cd6d991
regmap: include <linux/ktime.h> from include/linux/regmap.h
Similar to the readx_poll_timeout() macro calling ktime_* and using
ktime_t type, which is declared in <linux/ktime.h>. So, make
include/linux/regmap.h explicitly include <linux/ktime.h>, like
include/linux/iopoll.h does.  Otherwise, users of the macro will see
below errors.

error: implicit declaration of function ‘ktime_add_us’
[-Werror=implicit-function-declaration]

error: implicit declaration of function ‘ktime_get’
[-Werror=implicit-function-declaration]

error: implicit declaration of function ‘ktime_compare’
[-Werror=implicit-function-declaration]

include/linux/regmap.h:128:2: error: unknown type name ‘ktime_t’
  ktime_t __timeout = ktime_add_us(ktime_get(), __timeout_us); \

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-04-24 18:11:50 +01:00
Maxime Ripard 31895662f9
regmap: mmio: Add function to attach a clock
regmap_init_mmio_clk allows to specify a clock that needs to be enabled
while accessing the registers.

However, that clock is retrieved through its clock ID, which means it will
lookup that clock based on the current device that registers the regmap,
and, in the DT case, will only look in that device OF node.

This might be problematic if the clock to enable is stored in another node.
Let's add a function that allows to attach a clock that has already been
retrieved to a regmap in order to fix this.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-02-26 11:05:44 +00:00
Linus Torvalds f6cff79f1d Char/Misc driver patches for 4.16-rc1
Here is the big pull request for char/misc drivers for 4.16-rc1.
 
 There's a lot of stuff in here.  Three new driver subsystems were added
 for various types of hardware busses:
 	- siox
 	- slimbus
 	- soundwire
 as well as a new vboxguest subsystem for the VirtualBox hypervisor
 drivers.
 
 There's also big updates from the FPGA subsystem, lots of Android binder
 fixes, the usual handful of hyper-v updates, and lots of other smaller
 driver updates.
 
 All of these have been in linux-next for a long time, with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big pull request for char/misc drivers for 4.16-rc1.

  There's a lot of stuff in here. Three new driver subsystems were added
  for various types of hardware busses:

   - siox
   - slimbus
   - soundwire

  as well as a new vboxguest subsystem for the VirtualBox hypervisor
  drivers.

  There's also big updates from the FPGA subsystem, lots of Android
  binder fixes, the usual handful of hyper-v updates, and lots of other
  smaller driver updates.

  All of these have been in linux-next for a long time, with no reported
  issues"

* tag 'char-misc-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (155 commits)
  char: lp: use true or false for boolean values
  android: binder: use VM_ALLOC to get vm area
  android: binder: Use true and false for boolean values
  lkdtm: fix handle_irq_event symbol for INT_HW_IRQ_EN
  EISA: Delete error message for a failed memory allocation in eisa_probe()
  EISA: Whitespace cleanup
  misc: remove AVR32 dependencies
  virt: vbox: Add error mapping for VERR_INVALID_NAME and VERR_NO_MORE_FILES
  soundwire: Fix a signedness bug
  uio_hv_generic: fix new type mismatch warnings
  uio_hv_generic: fix type mismatch warnings
  auxdisplay: img-ascii-lcd: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
  uio_hv_generic: add rescind support
  uio_hv_generic: check that host supports monitor page
  uio_hv_generic: create send and receive buffers
  uio: document uio_hv_generic regions
  doc: fix documentation about uio_hv_generic
  vmbus: add monitor_id and subchannel_id to sysfs per channel
  vmbus: fix ABI documentation
  uio_hv_generic: use ISR callback method
  ...
2018-02-01 10:31:17 -08:00
Mark Brown a75de77211
Merge remote-tracking branches 'regmap/topic/soundwire' and 'regmap/topic/zero' into regmap-next 2018-01-12 20:04:01 +00:00
Mark Brown 757b65285f
Merge remote-tracking branches 'regmap/topic/const', 'regmap/topic/flat', 'regmap/topic/hwspinlock' and 'regmap/topic/nolock' into regmap-next 2018-01-12 20:03:57 +00:00
Andrew F. Davis 9bf485c955
regmap: Allow empty read/write_flag_mask
All zero read and write masks in the regmap config are used to signal no
special mask is needed and the bus defaults are used. In some devices
all zero read/write masks are the special mask and bus defaults should
not be used. To signal this a new variable is added.

For example SPI often sets bit 7 in address to signal to the device a
read is requested. On TI AFE44xx parts with SPI interfaces no bit
needs to be set as registers are either read or write only and the
operation can be determined from the address only. For this case both
masks must be zero to not effect the address.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-08 12:15:04 +00:00
Vinod Koul 7c22ce6e21
regmap: Add SoundWire bus support
SoundWire bus provides sdw_read() and sdw_write() APIs for Slave
devices to program the registers. Provide support in regmap for
SoundWire bus.

Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-08 11:27:18 +00:00
Baolin Wang a4887813c3
regmap: Add one flag to indicate if a hwlock should be used
Since the hwlock id 0 is valid for hardware spinlock core, but now id 0
is treated as one invalid value for regmap. Thus we should add one extra
flag for regmap config to indicate if a hardware spinlock should be used,
then id 0 can be valid for regmap to request.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-12-27 10:37:03 +00:00
Srinivas Kandagatla 7d6f7fb053 regmap: add SLIMbus support
This patch adds support to read/write SLIMbus value elements.
Currently it only supports byte read/write. Adding this support in
regmap would give codec drivers more flexibility when there are more
than 2 control interfaces like SLIMbus, i2c.

Without this patch each codec driver has to directly call SLIMbus value
element apis, and this could would get messy once we want to add i2c
interface to it.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviwed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-19 11:01:03 +01:00
Bartosz Golaszewski c9b41fcf27
regmap: allow to disable all locking mechanisms
We have a use case in the at24 EEPROM driver (recently converted to
using regmap instead of raw i2c/smbus calls) where we read from/write
to the regmap in a loop, while protecting the entire loop with
a mutex.

Currently this implicitly makes us use two mutexes - one in the driver
and one in regmap. While browsing the code for similar use cases I
noticed a significant number of places where locking *seems* redundant.

Allow users to completely disable any locking mechanisms in regmap
config.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-12-06 15:30:02 +00:00
Mark Brown a15fdc340d
Merge remote-tracking branches 'regmap/topic/const' and 'regmap/topic/hwspinlock' into regmap-next 2017-11-06 11:39:41 +00:00
Baolin Wang 8698b93647
regmap: Add hardware spinlock support
On some platforms, when reading or writing some special registers through
regmap, we should acquire one hardware spinlock to synchronize between
the multiple subsystems. Thus this patch adds the hardware spinlock
support for regmap.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-01 10:06:29 +00:00
Arnd Bergmann 1b0c22e455 regmap: avoid -Wint-in-bool-context warning
When we pass the result of a multiplication as the timeout or the delay,
we can get a warning from gcc-7:

drivers/mmc/host/bcm2835.c:596:149: error: '*' in boolean context, suggest '&&' instead [-Werror=int-in-bool-context]
drivers/mfd/arizona-core.c:247:195: error: '*' in boolean context, suggest '&&' instead [-Werror=int-in-bool-context]
drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c:49:27: error: '*' in boolean context, suggest '&&' instead [-Werror=int-in-bool-context]

The warning is a bit questionable inside of a macro, but this is
intentional on the side of the gcc developers.  It is also an indication
of another problem: we evaluate the timeout and sleep arguments multiple
times, which can have undesired side-effects when those are complex
expressions.

This changes the two regmap variants to use local variables for storing
copies of the timeouts.  This adds some more type safety, and avoids both
the double-evaluation and the gcc warning.

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81484
Link: http://lkml.kernel.org/r/20170726133756.2161367-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-10-13 18:22:11 +01:00
Mark Brown 89d5788315 Merge branch 'topic/field' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into regmap-core 2017-10-13 18:22:06 +01:00
Mark Brown 07d1346419 Merge branch 'topic/namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into regmap-core 2017-10-13 18:21:06 +01:00
Chen-Yu Tsai 667063acb8 regmap: add iopoll-like polling macro for regmap_field
This patch adds a macro regmap_field_read_poll_timeout that works
similar to the readx_poll_timeout defined in linux/iopoll.h, except
that this can also return the error value returned by a failed
regmap_field_read.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-10-04 11:46:32 +01:00
Ramesh Shanmugasundaram 780b1350d3 regmap: Avoid namespace collision within macro & tidy up
Renamed variable "timeout" to "__timeout" & "pollret" to "__ret" to
avoid namespace collision. Tidy up macro arguments with parentheses.

Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-07-10 19:19:16 +01:00
Mark Brown 2a40f9421c Merge remote-tracking branches 'regmap/topic/1wire', 'regmap/topic/irq' and 'regmap/topic/lzo' into regmap-next 2017-07-03 16:20:28 +01:00
Michael Grzeschik a71411dbf6 regmap: irq: add chip option mask_writeonly
Some irq controllers have writeonly/multipurpose register layouts. In
those cases we read invalid data back. Here we add the option
mask_writeonly as masking option.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-28 20:11:07 +01:00
Alex A. Mihaylov cc5d0db390 regmap: Add 1-Wire bus support
Add basic support regmap (register map access) API for 1-Wire bus

Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-06 19:47:28 +01:00
Mark Brown 90e51e6dd2 Merge remote-tracking branches 'regmap/topic/doc' and 'regmap/topic/rbtree' into regmap-next 2017-02-03 12:34:59 +01:00
Charles Keepax 2cf8e2dfdf regmap: Fixup the kernel-doc comments on functions/structures
Most of the kernel-doc comments in regmap don't actually generate
correctly. This patch fixes up a few common issues, corrects some typos
and adds some missing argument descriptions.

The most common issues being using a : after the function name which
causes the short description to not render correctly and not separating
the long and short descriptions of the function. There are quite a few
instances of arguments not being described or given the wrong name as
well.

This patch doesn't fixup functions/structures that are currently missing
descriptions.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-01-12 17:22:48 +00:00
Mark Brown 74e3368de8 Merge remote-tracking branches 'regmap/fix/header' and 'regmap/fix/macro' into regmap-linus 2016-10-29 12:14:39 -06:00
Charles Keepax 72193a953a regmap: Rename ret variable in regmap_read_poll_timeout
As almost all of the callers of the regmap_read_poll_timeout macro
will include a local ret variable we will always get a Sparse warning
about the duplication of the ret variable:

warning: symbol 'ret' shadows an earlier one

Simply rename the ret variable in the marco to pollret to make this
significantly less likely to happen.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28 18:19:24 +01:00
Masahiro Yamada adf08d481b regmap: include <linux/delay.h> from include/linux/regmap.h
The readx_poll_timeout() macro calls usleep_range(), which is
declared in <linux/delay.h>.

Make include/linux/regmap.h include <linux/delay.h>, like
include/linux/iopoll.h does.  Otherwise, users of the macro
will see "implicit declaration of function 'usleep_range'" error.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-13 16:44:04 +02:00
Tony Lindgren f50e38c996 regmap: Allow longer flag masks for read and write
We currently only support masking the top bit for read and write
flags. Let's make the mask unsigned long and mask the bytes based
on the configured register length to make things more generic.

This allows using regmap for more exotic combinations like SPI
devices that need little endian addressing.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-16 12:06:24 +01:00
Mark Brown efeb1a3ab9 Merge remote-tracking branches 'regmap/topic/bulk', 'regmap/topic/i2c', 'regmap/topic/iopoll', 'regmap/topic/irq' and 'regmap/topic/maintainers' into regmap-next 2016-07-15 13:44:47 +01:00
Philipp Zabel 08188ba882 regmap: add iopoll-like polling macro
This patch adds a macro regmap_read_poll_timeout that works similar
to the readx_poll_timeout defined in linux/iopoll.h, except that this
can also return the error value returned by a failed regmap_read.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-07-15 13:44:22 +01:00
Laxman Dewangan ccc1256192 regmap: irq: Add support to call client specific pre/post interrupt service
Regmap irq implements the generic interrupt service routine which
is common for most of devices. Some devices, like MAX77620, MAX20024
needs the special handling before and after servicing the interrupt
as generic. For the example, MAX77620 programming guidelines for
interrupt servicing says:
1. When interrupt occurs from PMIC, mask the PMIC interrupt by setting
   GLBLM.
2. Read IRQTOP and service the interrupt accordingly.
3. Once all interrupts has been checked and serviced, the interrupt
   service routine un-masks the hardware interrupt line by clearing
   GLBLM.

The step (2) is implemented in regmap irq as generic routine. For
step (1) and (3), add callbacks from regmap irq to client driver
to handle chip specific configurations.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-03 00:41:15 +01:00
Mark Brown d25263d917 Merge remote-tracking branch 'regmap/topic/update-bits' into regmap-next 2016-03-05 21:30:41 +09:00
Mark Brown 0b74f06fcb Merge remote-tracking branches 'regmap/topic/devm-irq', 'regmap/topic/doc', 'regmap/topic/irq' and 'regmap/topic/stride' into regmap-next 2016-03-05 21:30:32 +09:00
Laxman Dewangan 045b98480c regmap: irq: add devm apis for regmap_{add,del}_irq_chip
Add device managed APIs for regmap_add_irq_chip() and
regmap_del_irq_chip() so that it can be managed by
device framework for freeing it.

This helps on following:
1. Maintaining the sequence of resource allocation and deallocation
	regmap_add_irq_chip(&d);
	devm_requested_threaded_irq(virq)

	On free path:
		regmap_del_irq_chip(d);
		and then removing the irq registration.

	On this case, regmap irq is deleted before the irq is free.
	This force to use normal irq registration.

	By using devm apis, the sequence can be maintain properly:
		devm_regmap_add_irq_chip(&d);
		devm_requested_threaded_irq(virq);

	and resource deallocation will be done in reverse order
	by device framework.

2. No need to delete the regmap_irq_chip in error path or remove
   callback and hence there is less code on this path.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-05 14:32:27 +09:00
Kuninori Morimoto b821957a5a regmap: replace regmap_write_bits()
commit 23b92e4cf5fd ("regmap: remove regmap_write_bits()")
removed regmap_write_bits(), but MFD driver was using it.
So, commit e30fccd6771d ("regmap: Keep regmap_write_bits()")
turns out it, but it is using original style.
This patch uses regmap_update_bits_base() for regmap_write_bits()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-05 12:54:36 +09:00