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Linus Torvalds c288ea6798 gpio updates for v5.17
- new testing module: gpio-sim that is scheduled to replace gpio-mockup
 - initial changes aiming at converting all GPIO drivers to using the fwnode
   interface and limiting any references to OF symbols to gpiolib-of.c
 - add support for Tegra234 and Tegra241 to gpio-tegra186
 - add support for new models (SSD201 and SSD202D) to gpio-msc313
 - add basic support for interrupts to gpio-aggregator
 - add support for AMDIF031 HID device to gpio-amdpt
 - drop support for unused platforms in gpio-xlp
 - cleanup leftovers from the removal of the legacy Samsung Exynos GPIO driver
 - use raw spinlocks in gpio-aspeed and gpio-aspeed-sgpio to make PREEMPT_RT
   happy
 - generalize the common 'ngpios' device property by reading it in the core
   gpiolib code so that we can remove duplicate reads from drivers
 - allow line names from device properties to override names set by drivers
 - code shrink in gpiod_add_lookup_table()
 - add new model to the DT bindings for gpio-vf610
 - convert DT bindings for tegra devices to YAML
 - improvements to interrupt handling in gpio-rcar and gpio-rockchip
 - updates to intel drivers from Andy (details in the merge commit)
 - some minor tweaks, improvements and coding-style fixes all around the
   subsystem
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Merge tag 'gpio-updates-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "The gpio-sim module is back, this time without any changes to
  configfs. This results in a less elegant user-space interface but I
  never got any follow-up on the committable items and didn't want to
  delay this module for several more months.

  Other than that we have support for several new models and some
  support going away. We started working on converting GPIO drivers to
  using fwnode exclusively in order to limit references to OF symbols to
  gpiolib-of.c exclusively. We also have regular tweaks and improvements
  all over the place.

  Summary:

   - new testing module: gpio-sim that is scheduled to replace
     gpio-mockup

   - initial changes aiming at converting all GPIO drivers to using the
     fwnode interface and limiting any references to OF symbols to
     gpiolib-of.c

   - add support for Tegra234 and Tegra241 to gpio-tegra186

   - add support for new models (SSD201 and SSD202D) to gpio-msc313

   - add basic support for interrupts to gpio-aggregator

   - add support for AMDIF031 HID device to gpio-amdpt

   - drop support for unused platforms in gpio-xlp

   - cleanup leftovers from the removal of the legacy Samsung Exynos
     GPIO driver

   - use raw spinlocks in gpio-aspeed and gpio-aspeed-sgpio to make
     PREEMPT_RT happy

   - generalize the common 'ngpios' device property by reading it in the
     core gpiolib code so that we can remove duplicate reads from
     drivers

   - allow line names from device properties to override names set by
     drivers

   - code shrink in gpiod_add_lookup_table()

   - add new model to the DT bindings for gpio-vf610

   - convert DT bindings for tegra devices to YAML

   - improvements to interrupt handling in gpio-rcar and gpio-rockchip

   - updates to intel drivers from Andy (details in the merge commit)

   - some minor tweaks, improvements and coding-style fixes all around
     the subsystem"

* tag 'gpio-updates-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (59 commits)
  gpio: rcar: Propagate errors from devm_request_irq()
  gpio: rcar: Use platform_get_irq() to get the interrupt
  gpio: ts5500: Use platform_get_irq() to get the interrupt
  gpio: dwapb: Switch to use fwnode instead of of_node
  gpiolib: acpi: make fwnode take precedence in struct gpio_chip
  dt-bindings: gpio: samsung: drop unused bindings
  gpio: max3191x: Use bitmap_free() to free bitmap
  gpio: regmap: Switch to use fwnode instead of of_node
  gpio: tegra186: Add support for Tegra241
  dt-bindings: gpio: Add Tegra241 support
  gpio: brcmstb: Use local variable to access OF node
  gpio: Remove unused local OF node pointers
  gpio: sim: add missing fwnode_handle_put() in gpio_sim_probe()
  gpio: msc313: Add support for SSD201 and SSD202D
  gpio: msc313: Code clean ups
  dt-bindings: gpio: msc313: Add offsets for ssd20xd
  dt-bindings: gpio: msc313: Add compatible for ssd20xd
  gpio: sim: fix uninitialized ret variable
  gpio: Propagate firmware node from a parent device
  gpio: Setup parent device and get rid of unnecessary of_node assignment
  ...
2022-01-11 12:31:35 -08:00
Steven Lee e5a7431f5a gpio: gpio-aspeed-sgpio: Fix wrong hwirq base in irq handler
Each aspeed sgpio bank has 64 gpio pins(32 input pins and 32 output pins).
The hwirq base for each sgpio bank should be multiples of 64 rather than
multiples of 32.

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-01-03 10:50:12 +01:00
Iwona Winiarska ab39d6988d gpio: aspeed-sgpio: Convert aspeed_sgpio.lock to raw_spinlock
The gpio-aspeed-sgpio driver implements an irq_chip which need to be
invoked from hardirq context. Since spin_lock() can sleep with
PREEMPT_RT, it is no longer legal to invoke it while interrupts are
disabled.
This also causes lockdep to complain about:
[   25.919465] [ BUG: Invalid wait context ]
because aspeed_sgpio.lock (spin_lock_t) is taken under irq_desc.lock
(raw_spinlock_t).
Let's use of raw_spinlock_t instead of spinlock_t.

Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2021-12-10 16:14:51 +01:00
Steven Lee f6c35df227 gpio: gpio-aspeed-sgpio: Fix wrong hwirq in irq handler.
The current hwirq is calculated based on the old GPIO pin order(input
GPIO range is from 0 to ngpios - 1).
It should be calculated based on the current GPIO input pin order(input
GPIOs are 0, 2, 4, ..., (ngpios - 1) * 2).

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2021-09-22 11:23:10 +02:00
Linus Torvalds 5e6a5845dd gpio updates for v5.15
- new driver: gpio-virtio allowing a guest VM running linux to access
   GPIO lines provided by the host
 - split the GPIO driver out of the rockchip pin control driver
 - add support for a new model to gpio-aspeed-sgpio, refactor the driver
   and use generic device property interfaces, improve property sanitization
 - add ACPI support to gpio-tegra186
 - improve the code setting the line names to support multiple GPIO banks
   per device
 - constify a bunch of OF functions in the core GPIO code and make the
   declaration for one of the core OF functions we use consistent within its
   header
 - use software nodes in intel_quark_i2c_gpio
 - add support for the gpio-line-names property in gpio-mt7621
 - use the standard GPIO function for setting the GPIO names in gpio-brcmstb
 - fix a bunch of leaks and other bugs in gpio-mpc8xxx
 - use generic pm callbacks in gpio-ml-ioh
 - improve resource management and PM handling in gpio-mlxbf2
 - modernize and improve the gpio-dwapb driver
 - coding style improvements in gpio-rcar
 - documentation fixes and improvements
 - update the MAINTAINERS entry for gpio-zynq
 - minor tweaks in several drivers
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Merge tag 'gpio-updates-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "We mostly have various improvements and refactoring all over the place
  but also some interesting new features - like the virtio GPIO driver
  that allows guest VMs to use host's GPIOs. We also have a new/old GPIO
  driver for rockchip - this one has been split out of the pinctrl
  driver.

  Summary:

   - new driver: gpio-virtio allowing a guest VM running linux to access
     GPIO lines provided by the host

   - split the GPIO driver out of the rockchip pin control driver

   - add support for a new model to gpio-aspeed-sgpio, refactor the
     driver and use generic device property interfaces, improve property
     sanitization

   - add ACPI support to gpio-tegra186

   - improve the code setting the line names to support multiple GPIO
     banks per device

   - constify a bunch of OF functions in the core GPIO code and make the
     declaration for one of the core OF functions we use consistent
     within its header

   - use software nodes in intel_quark_i2c_gpio

   - add support for the gpio-line-names property in gpio-mt7621

   - use the standard GPIO function for setting the GPIO names in
     gpio-brcmstb

   - fix a bunch of leaks and other bugs in gpio-mpc8xxx

   - use generic pm callbacks in gpio-ml-ioh

   - improve resource management and PM handling in gpio-mlxbf2

   - modernize and improve the gpio-dwapb driver

   - coding style improvements in gpio-rcar

   - documentation fixes and improvements

   - update the MAINTAINERS entry for gpio-zynq

   - minor tweaks in several drivers"

* tag 'gpio-updates-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (35 commits)
  gpio: mpc8xxx: Use 'devm_gpiochip_add_data()' to simplify the code and avoid a leak
  gpio: mpc8xxx: Fix a potential double iounmap call in 'mpc8xxx_probe()'
  gpio: mpc8xxx: Fix a resources leak in the error handling path of 'mpc8xxx_probe()'
  gpio: viperboard: remove platform_set_drvdata() call in probe
  gpio: virtio: Add missing mailings lists in MAINTAINERS entry
  gpio: virtio: Fix sparse warnings
  gpio: remove the obsolete MX35 3DS BOARD MC9S08DZ60 GPIO functions
  gpio: max730x: Use the right include
  gpio: Add virtio-gpio driver
  gpio: mlxbf2: Use DEFINE_RES_MEM_NAMED() helper macro
  gpio: mlxbf2: Use devm_platform_ioremap_resource()
  gpio: mlxbf2: Drop wrong use of ACPI_PTR()
  gpio: mlxbf2: Convert to device PM ops
  gpio: dwapb: Get rid of legacy platform data
  mfd: intel_quark_i2c_gpio: Convert GPIO to use software nodes
  gpio: dwapb: Read GPIO base from gpio-base property
  gpio: dwapb: Unify ACPI enumeration checks in get_irq() and configure_irqs()
  gpiolib: Deduplicate forward declaration in the consumer.h header
  MAINTAINERS: update gpio-zynq.yaml reference
  gpio: tegra186: Add ACPI support
  ...
2021-09-07 12:27:27 -07:00
Marc Zyngier dbd1c54fc8 gpio: Bulk conversion to generic_handle_domain_irq()
Wherever possible, replace constructs that match either
generic_handle_irq(irq_find_mapping()) or
generic_handle_irq(irq_linear_revmap()) to a single call to
generic_handle_domain_irq().

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-08-12 11:39:38 +01:00
Steven Lee f43837f4f6 gpio: gpio-aspeed-sgpio: Return error if ngpios is not multiple of 8.
Add an else-if condition in the probe function to check whether ngpios is
multiple of 8.
Per AST datasheet, numbers of available serial GPIO pins in Serial GPIO
Configuration Register must be n bytes. For instance, if n = 1, it means
AST SoC supports 8 GPIO pins.

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-05 21:16:54 +02:00
Steven Lee 1f857b6752 gpio: gpio-aspeed-sgpio: Use generic device property APIs
Replace all of_property_read_u32() with device_property_read_u32().

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-05 21:16:40 +02:00
Steven Lee 09ac953b65 gpio: gpio-aspeed-sgpio: Move irq_chip to aspeed-sgpio struct
The current design initializes irq->chip from a global irqchip struct,
which causes multiple sgpio devices use the same irq_chip.
The patch moves irq_chip to aspeed_sgpio struct for initializing
irq_chip from their private gpio struct.

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-05 21:16:26 +02:00
Steven Lee 8a3581c666 gpio: gpio-aspeed-sgpio: Add set_config function
AST SoC supports *retain pin state* function when wdt reset.
The patch adds set_config function for handling sgpio reset tolerance
register.

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-05 21:16:18 +02:00
Steven Lee e1f85d2563 gpio: gpio-aspeed-sgpio: Add AST2600 sgpio support
The maximum number of gpio pins of SoC is hardcoded as 80 and the gpio pin
count mask for GPIO Configuration register is hardcode as GENMASK(9,6).
However, AST2600 has 2 sgpio master interfaces, one of them supports up
to 128 gpio pins and pin count mask of GPIO Configuration Register is 5
bits.

The patch adds ast2600 compatibles, removes MAX_NR_HW_SGPIO and
corresponding design to make the gpio input/output pin base are determined
by ngpios.
The patch also removed hardcoded pin mask and adds ast2400, ast2500,
ast2600 platform data that include gpio pin count mask for GPIO
Configuration Register.

The original pin order is as follows:
(suppose MAX_NR_HW_SGPIO is 80 and ngpios is 10 as well)
Input:
0 1 2 3 ... 9
Output:
80 81 82 ... 89

The new pin order is as follows:
Input:
0 2 4 6 ... 18
Output:
1 3 5 7 ... 19

SGPIO pin id and input/output pin mapping is as follows:
SGPIO0(0,1), SGPIO1(2,3), ..., SGPIO79(158,159)

For example:
Access SGPIO5(10,11)
Get SGPIO pin 5 (suppose sgpio chip id is 2)
gpioget 2 10

Set SGPIO pin 5 (suppose sgpio chip id is 2)
gpioset 2 11=1
gpioset 2 11=0

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-05 21:15:59 +02:00
Linus Torvalds 0bf0dfda00 Some late GPIO fixes for the v5.9 series:
- Fix compiler warnings on the OMAP when PM is disabled
 
 - Clear the interrupt when setting edge sensitivity on the
   Spreadtrum driver.
 
 - Fix up spurious interrupts on the TC35894.
 
 - Support threaded interrupts on the Siox controller.
 
 - Fix resource leaks on the mockup driver.
 
 - Fix line event handling in syscall compatible mode
   for the character device.
 
 - Fix an unitialized variable in the PCA953A driver.
 
 - Fix access to all GPIO IRQs on the Aspeed AST2600.
 
 - Fix line direction on the AMD FCH driver.
 
 - Use the bitmap API instead of compiler intrinsics for
   bit manipulation in the PCA953x driver.
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Merge tag 'gpio-v5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Some late GPIO fixes for the v5.9 series:

   - Fix compiler warnings on the OMAP when PM is disabled

   - Clear the interrupt when setting edge sensitivity on the Spreadtrum
     driver.

   - Fix up spurious interrupts on the TC35894.

   - Support threaded interrupts on the Siox controller.

   - Fix resource leaks on the mockup driver.

   - Fix line event handling in syscall compatible mode for the
     character device.

   - Fix an unitialized variable in the PCA953A driver.

   - Fix access to all GPIO IRQs on the Aspeed AST2600.

   - Fix line direction on the AMD FCH driver.

   - Use the bitmap API instead of compiler intrinsics for bit
     manipulation in the PCA953x driver"

* tag 'gpio-v5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: pca953x: Correctly initialize registers 6 and 7 for PCA957x
  gpio: pca953x: Use bitmap API over implicit GCC extension
  gpio: amd-fch: correct logic of GPIO_LINE_DIRECTION
  gpio: aspeed: fix ast2600 bank properties
  gpio/aspeed-sgpio: don't enable all interrupts by default
  gpio/aspeed-sgpio: enable access to all 80 input & output sgpios
  gpio: pca953x: Fix uninitialized pending variable
  gpiolib: Fix line event handling in syscall compatible mode
  gpio: mockup: fix resource leak in error path
  gpio: siox: explicitly support only threaded irqs
  gpio: tc35894: fix up tc35894 interrupt configuration
  gpio: sprd: Clear interrupt when setting the type as edge
  gpio: omap: Fix warnings if PM is disabled
2020-10-02 09:51:42 -07:00
Jeremy Kerr bf0d394e88 gpio/aspeed-sgpio: don't enable all interrupts by default
Currently, the IRQ setup for the SGPIO driver enables all interrupts in
dual-edge trigger mode. Since the default handler is handle_bad_irq, any
state change on input GPIOs will trigger bad IRQ warnings.

This change applies sensible IRQ defaults: single-edge trigger, and all
IRQs disabled.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae7 ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-24 15:10:56 +02:00
Jeremy Kerr ac67b07e26 gpio/aspeed-sgpio: enable access to all 80 input & output sgpios
Currently, the aspeed-sgpio driver exposes up to 80 GPIO lines,
corresponding to the 80 status bits available in hardware. Each of these
lines can be configured as either an input or an output.

However, each of these GPIOs is actually an input *and* an output; we
actually have 80 inputs plus 80 outputs.

This change expands the maximum number of GPIOs to 160; the lower half
of this range are the input-only GPIOs, the upper half are the outputs.
We fix the GPIO directions to correspond to this mapping.

This also fixes a bug when setting GPIOs - we were reading from the
input register, making it impossible to set more than one output GPIO.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae7 ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-24 15:10:40 +02:00
Gustavo A. R. Silva df561f6688 treewide: Use fallthrough pseudo-keyword
Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-23 17:36:59 -05:00
Sachin agarwal 0d311d8b93 gpio: aspeed-sgpio: fixed typos
This fixes some various typos.

Signed-off-by: Sachin Agarwal <asachin591@gmail.com>
Link: https://lore.kernel.org/r/20200118105319.68637-1-sachinagarwal@sachins-MacBook-2.local
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-01-23 16:16:05 +01:00
Arnd Bergmann 11e299de3a gpio: aspeed: avoid return type warning
gcc has a hard time tracking whether BUG_ON(1) ends
execution or not:

drivers/gpio/gpio-aspeed-sgpio.c: In function 'bank_reg':
drivers/gpio/gpio-aspeed-sgpio.c:112:1: error: control reaches end of non-void function [-Werror=return-type]

Use the simpler BUG() that gcc knows cannot continue.

Fixes: f8b410e369 ("gpio: aspeed-sgpio: Rename and add Kconfig/Makefile")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-12-11 10:07:22 +01:00
Linus Walleij f8b410e369 gpio: aspeed-sgpio: Rename and add Kconfig/Makefile
This renames the "gpio-aspeed" driver to conform with other
GPIO drivers as "gpio-aspeed-sgpio.c". All GPIO drivers
should start with the string "gpio-" no special exceptions.

Also the Kconfig and Makefile entries should normally
go with the driver but I missed this in my review, sorry
for mistake. "CONFIG_GPIO_ASPEED_SGPIO" is used to
activate this driver.

Cc: Hongwei Zhang <hongweiz@ami.com>
Fixes: 7db47faae7 ("gpio: aspeed: Add SGPIO driver")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20190927114833.12551-1-linus.walleij@linaro.org
2019-09-30 23:54:03 +02:00