[PATCH v6 00/12] Add support for MAX7360

Mathieu Dubois-Briand
2025-04-09T14:56:42Z

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 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 (10):
dt-bindings: mfd: gpio: Add MAX7360
pinctrl: Add MAX7360 pinctrl driver
regmap: irq: Remove unreachable goto
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 | 171 ++++++++++++
MAINTAINERS | 13 +
drivers/base/regmap/regmap-irq.c | 97 ++++---
drivers/gpio/Kconfig | 12 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-max7360.c | 250 +++++++++++++++++
drivers/gpio/gpio-regmap.c | 22 +-
drivers/input/keyboard/Kconfig | 12 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/max7360-keypad.c | 299 +++++++++++++++++++++
drivers/input/misc/Kconfig | 10 +
drivers/input/misc/Makefile | 1 +
drivers/input/misc/max7360-rotary.c | 148 ++++++++++
drivers/mfd/Kconfig | 14 +
drivers/mfd/Makefile | 1 +
drivers/mfd/max7360.c | 186 +++++++++++++
drivers/pinctrl/Kconfig | 11 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-max7360.c | 208 ++++++++++++++
drivers/pwm/Kconfig | 10 +
drivers/pwm/Makefile | 1 +
drivers/pwm/pwm-max7360.c | 190 +++++++++++++
include/linux/gpio/regmap.h | 21 ++
include/linux/mfd/max7360.h | 109 ++++++++
include/linux/regmap.h | 3 +
26 files changed, 1842 insertions(+), 33 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20241219-mdb-max7360-support-223a8ce45ba3

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