pinctrl: nuvoton: Add ma35d1 pinctrl and GPIO driver

Add common pinctrl and GPIO driver for Nuvoton MA35 series SoC, and
add support for ma35d1 pinctrl.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
Link: https://lore.kernel.org/r/20240521012447.42211-4-ychuang570808@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/nuvoton/Kconfig

@@ -45,3 +45,22 @@ config PINCTRL_NPCM8XX
 	  Say Y or M here to enable pin controller and GPIO support for
 	  the Nuvoton NPCM8XX SoC. This is strongly recommended when
 	  building a kernel that will run on this chip.
+
+config PINCTRL_MA35
+	bool
+	depends on (ARCH_MA35 || COMPILE_TEST) && OF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	select GENERIC_PINCONF
+	select GPIOLIB
+	select GPIO_GENERIC
+	select GPIOLIB_IRQCHIP
+	select MFD_SYSCON
+
+config PINCTRL_MA35D1
+	bool "Pinctrl and GPIO driver for Nuvoton MA35D1"
+	depends on (ARCH_MA35 || COMPILE_TEST) && OF
+	select PINCTRL_MA35
+	help
+	  Say Y here to enable pin controller and GPIO support
+	  for Nuvoton MA35D1 SoC.

drivers/pinctrl/nuvoton/Makefile

@@ -4,3 +4,5 @@
 obj-$(CONFIG_PINCTRL_WPCM450)	+= pinctrl-wpcm450.o
 obj-$(CONFIG_PINCTRL_NPCM7XX)	+= pinctrl-npcm7xx.o
 obj-$(CONFIG_PINCTRL_NPCM8XX)	+= pinctrl-npcm8xx.o
+obj-$(CONFIG_PINCTRL_MA35)	+= pinctrl-ma35.o
+obj-$(CONFIG_PINCTRL_MA35D1)	+= pinctrl-ma35d1.o

drivers/pinctrl/nuvoton/pinctrl-ma35.h

@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Nuvoton Technology Corp.
+ *
+ * Author: Shan-Chun Hung <schung@nuvoton.com>
+ * *       Jacky Huang <ychuang3@nuvoton.com>
+ */
+#ifndef __PINCTRL_MA35_H
+#define __PINCTRL_MA35_H
+
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+
+struct ma35_mux_desc {
+	const char *name;
+	u32 muxval;
+};
+
+struct ma35_pin_data {
+	u32 offset;
+	u32 shift;
+	struct ma35_mux_desc *muxes;
+};
+
+struct ma35_pinctrl_soc_info {
+	const struct pinctrl_pin_desc *pins;
+	unsigned int npins;
+	int (*get_pin_num)(int offset, int shift);
+};
+
+#define MA35_PIN(num, n, o, s, ...) {			\
+	.number = num,					\
+	.name = #n,					\
+	.drv_data = &(struct ma35_pin_data) {		\
+		.offset = o,				\
+		.shift = s,				\
+		.muxes = (struct ma35_mux_desc[]) {	\
+			 __VA_ARGS__, { } },		\
+	},						\
+}
+
+#define MA35_MUX(_val, _name) {				\
+	.name = _name,					\
+	.muxval = _val,					\
+}
+
+int ma35_pinctrl_probe(struct platform_device *pdev, const struct ma35_pinctrl_soc_info *info);
+int ma35_pinctrl_suspend(struct device *dev);
+int ma35_pinctrl_resume(struct device *dev);
+
+#endif /* __PINCTRL_MA35_H */