Input: adp5585: Add Analog Devices ADP5585/89 support

The ADP5585 is a 10/11 input/output port expander with a built in keypad
matrix decoder, programmable logic, reset generator, and PWM generator.
This driver supports the keyboard function using the platform device
registered by the core MFD driver.

The ADP5589 has 19 pins and also features an unlock function.

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20250701-dev-adp5589-fw-v7-16-b1fcfe9e9826@analog.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: nunojsa

MAINTAINERS

@@ -550,6 +550,7 @@ L:	linux-pwm@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/*/adi,adp5585*.yaml
 F:	drivers/gpio/gpio-adp5585.c
+F:	drivers/input/keyboard/adp5585-keys.c
 F:	drivers/mfd/adp5585.c
 F:	drivers/pwm/pwm-adp5585.c
 F:	include/linux/mfd/adp5585.h

drivers/input/keyboard/Kconfig

@@ -37,6 +37,17 @@ config KEYBOARD_ADP5520
 	  To compile this driver as a module, choose M here: the module will
 	  be called adp5520-keys.
 
+config KEYBOARD_ADP5585
+	tristate "ADP558x keypad support"
+	depends on MFD_ADP5585
+	select INPUT_MATRIXKMAP
+	help
+	  This option enables support for the KEYPAD function found in the Analog
+	  Devices ADP5585 and similar devices.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called adp5585-keys.
+
 config KEYBOARD_ADP5588
 	tristate "ADP5588/87 I2C QWERTY Keypad and IO Expander"
 	depends on I2C

drivers/input/keyboard/Makefile

@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_KEYBOARD_ADC)		+= adc-keys.o
 obj-$(CONFIG_KEYBOARD_ADP5520)		+= adp5520-keys.o
+obj-$(CONFIG_KEYBOARD_ADP5585)		+= adp5585-keys.o
 obj-$(CONFIG_KEYBOARD_ADP5588)		+= adp5588-keys.o
 obj-$(CONFIG_KEYBOARD_ADP5589)		+= adp5589-keys.o
 obj-$(CONFIG_KEYBOARD_AMIGA)		+= amikbd.o