[PATCH v9 00/11] Add support for MAX7360

[Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>]

This series implements a set of drivers allowing to support the Maxim
Integrated MAX7360 device.

The MAX7360 is an I2C key-switch and led controller, with following
functionalities:
- Keypad controller for a key matrix of up to 8 rows and 8 columns.
- Rotary encoder support, for a single rotary encoder.
- Up to 8 PWM outputs.
- Up to 8 GPIOs with support for interrupts and 6 GPOs.

Chipset pins are shared between all functionalities, so all cannot be
used at the same time.

Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
---
Changes in v9:
- Fix build issue with bad usage of array_size() on intermediate commit.
- MFD: Fix error strings. Also fix #define style in the header file.
- Pinctrl: Fix missing include.
- PWM: Fix register writes in max7360_pwm_waveform() and
  max7360_pwm_round_waveform_tohw().
- GPIO: Fix GPIO valid mask initialization.
- Link to v8: https://lore.kernel.org/r/20250509-mdb-max7360-support-v8-0-bbe486f6bcb7@bootlin.com

Changes in v8:
- Small changes in drivers.
- Rebased on v6.15-rc5
- Link to v7: https://lore.kernel.org/r/20250428-mdb-max7360-support-v7-0-4e0608d0a7ff@bootlin.com

Changes in v7:
- Add rotary encoder absolute axis support in device tree bindings and
  driver.
- Lot of small changes in keypad, rotary encoder and GPIO drivers.
- Rebased on v6.15-rc4
- Link to v6: https://lore.kernel.org/r/20250409-mdb-max7360-support-v6-0-7a2535876e39@bootlin.com

Changes in v6:
- Rebased on v6.15-rc1.
- Use device_set_of_node_from_dev() instead of creating PWM and Pinctrl
  on parent device.
- Various small fixes in all drivers.
- Fix pins property pattern in pinctrl dt bindings.
- Link to v5: https://lore.kernel.org/r/20250318-mdb-max7360-support-v5-0-fb20baf97da0@bootlin.com

Changes in v5:
- Add pinctrl driver to replace the previous use of request()/free()
  callbacks for PORT pins.
- Remove ngpios property from GPIO device tree bindings.
- Use GPIO valid_mask to mark unusable keypad columns GPOs, instead of
  changing ngpios.
- Drop patches adding support for request()/free() callbacks in GPIO
  regmap and gpio_regmap_get_ngpio().
- Allow gpio_regmap_register() to create the associated regmap IRQ.
- Various fixes in MFD, PWM, GPIO and KEYPAD drivers.
- Link to v4: https://lore.kernel.org/r/20250214-mdb-max7360-support-v4-0-8a35c6dbb966@bootlin.com

Changes in v4:
- Modified the GPIO driver to use gpio-regmap and regmap-irq.
- Add support for request()/free() callbacks in gpio-regmap.
- Add support for status_is_level in regmap-irq.
- Switched the PWM driver to waveform callbacks.
- Various small fixes in MFD, PWM, GPIO drivers and dt bindings.
- Rebased on v6.14-rc2.
- Link to v3: https://lore.kernel.org/r/20250113-mdb-max7360-support-v3-0-9519b4acb0b1@bootlin.com

Changes in v3:
- Fix MFD device tree binding to add gpio child nodes.
- Fix various small issues in device tree bindings.
- Add missing line returns in error messages.
- Use dev_err_probe() when possible.
- Link to v2: https://lore.kernel.org/r/20241223-mdb-max7360-support-v2-0-37a8d22c36ed@bootlin.com

Changes in v2:
- Removing device tree subnodes for keypad, rotary encoder and pwm
  functionalities.
- Fixed dt-bindings syntax and naming.
- Fixed missing handling of requested period in PWM driver.
- Cleanup of the code
- Link to v1: https://lore.kernel.org/r/20241219-mdb-max7360-support-v1-0-8e8317584121@bootlin.com

---
Kamel Bouhara (2):
      mfd: Add max7360 support
      pwm: max7360: Add MAX7360 PWM support

Mathieu Dubois-Briand (9):
      dt-bindings: mfd: gpio: Add MAX7360
      pinctrl: Add MAX7360 pinctrl driver
      regmap: irq: Add support for chips without separate IRQ status
      gpio: regmap: Allow to allocate regmap-irq device
      gpio: regmap: Allow to provide init_valid_mask callback
      gpio: max7360: Add MAX7360 gpio support
      input: keyboard: Add support for MAX7360 keypad
      input: misc: Add support for MAX7360 rotary
      MAINTAINERS: Add entry on MAX7360 driver

 .../bindings/gpio/maxim,max7360-gpio.yaml          |  83 ++++++
 .../devicetree/bindings/mfd/maxim,max7360.yaml     | 191 +++++++++++++
 MAINTAINERS                                        |  13 +
 drivers/base/regmap/regmap-irq.c                   |  99 ++++---
 drivers/gpio/Kconfig                               |  12 +
 drivers/gpio/Makefile                              |   1 +
 drivers/gpio/gpio-max7360.c                        | 257 +++++++++++++++++
 drivers/gpio/gpio-regmap.c                         |  22 +-
 drivers/input/keyboard/Kconfig                     |  12 +
 drivers/input/keyboard/Makefile                    |   1 +
 drivers/input/keyboard/max7360-keypad.c            | 308 +++++++++++++++++++++
 drivers/input/misc/Kconfig                         |  10 +
 drivers/input/misc/Makefile                        |   1 +
 drivers/input/misc/max7360-rotary.c                | 192 +++++++++++++
 drivers/mfd/Kconfig                                |  14 +
 drivers/mfd/Makefile                               |   1 +
 drivers/mfd/max7360.c                              | 171 ++++++++++++
 drivers/pinctrl/Kconfig                            |  11 +
 drivers/pinctrl/Makefile                           |   1 +
 drivers/pinctrl/pinctrl-max7360.c                  | 215 ++++++++++++++
 drivers/pwm/Kconfig                                |  10 +
 drivers/pwm/Makefile                               |   1 +
 drivers/pwm/pwm-max7360.c                          | 180 ++++++++++++
 include/linux/gpio/regmap.h                        |  18 ++
 include/linux/mfd/max7360.h                        | 109 ++++++++
 include/linux/regmap.h                             |   3 +
 26 files changed, 1903 insertions(+), 33 deletions(-)
---
base-commit: 92a09c47464d040866cf2b4cd052bc60555185fb
change-id: 20241219-mdb-max7360-support-223a8ce45ba3

Best regards,
-- 
Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>