pinctrl: airoha: Add support for EN7581 SoC

Introduce pinctrl driver for EN7581 SoC. Current EN7581 pinctrl driver
supports the following functionalities:
- pin multiplexing
- pin pull-up, pull-down, open-drain, current strength,
  {input,output}_enable, output_{low,high}
- gpio controller
- irq controller

Tested-by: Benjamin Larsson <benjamin.larsson@genexis.eu>
Co-developed-by: Benjamin Larsson <benjamin.larsson@genexis.eu>
Signed-off-by: Benjamin Larsson <benjamin.larsson@genexis.eu>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/20241023-en7581-pinctrl-v9-5-afb0cbcab0ec@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: LorenzoBianconi

MAINTAINERS

@@ -18232,6 +18232,13 @@ F:	drivers/pinctrl/
 F:	include/dt-bindings/pinctrl/
 F:	include/linux/pinctrl/
 
+PIN CONTROLLER - AIROHA
+M:	Lorenzo Bianconi <lorenzo@kernel.org>
+L:	linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/pinctrl/airoha,en7581-pinctrl.yaml
+F:	drivers/pinctrl/mediatek/pinctrl-airoha.c
+
 PIN CONTROLLER - AMD
 M:	Basavaraj Natikar <Basavaraj.Natikar@amd.com>
 M:	Shyam Sundar S K <Shyam-sundar.S-k@amd.com>

drivers/pinctrl/mediatek/Kconfig

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menu "MediaTek pinctrl drivers"
-	depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
+	depends on ARCH_MEDIATEK || ARCH_AIROHA || RALINK || COMPILE_TEST
 
 config EINT_MTK
 	tristate "MediaTek External Interrupt Support"
@@ -126,6 +126,21 @@ config PINCTRL_MT8127
 	select PINCTRL_MTK
 
 # For ARMv8 SoCs
+config PINCTRL_AIROHA
+	tristate "Airoha EN7581 pin control"
+	depends on OF
+	depends on ARM64 || COMPILE_TEST
+	select PINMUX
+	select GENERIC_PINCONF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	select REGMAP_MMIO
+	help
+	  Say yes here to support pin controller and gpio driver
+	  on Airoha EN7581 SoC.
+
 config PINCTRL_MT2712
 	bool "MediaTek MT2712 pin control"
 	depends on OF

drivers/pinctrl/mediatek/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_PINCTRL_MTK_MOORE)		+= pinctrl-moore.o
 obj-$(CONFIG_PINCTRL_MTK_PARIS)		+= pinctrl-paris.o
 
 # SoC Drivers
+obj-$(CONFIG_PINCTRL_AIROHA)		+= pinctrl-airoha.o
 obj-$(CONFIG_PINCTRL_MT7620)		+= pinctrl-mt7620.o
 obj-$(CONFIG_PINCTRL_MT7621)		+= pinctrl-mt7621.o
 obj-$(CONFIG_PINCTRL_MT76X8)		+= pinctrl-mt76x8.o