pinctrl: add NXP S32 SoC family support

Add the pinctrl driver for NXP S32G SoC family. This driver is mainly based
on NXP's downstream implementation on CodeAurora[1].

[1] https://source.codeaurora.org/external/autobsps32/linux/tree/drivers/pinctrl/freescale?h=bsp34.0-5.10.120-rt

Signed-off-by: Matthew Nunez <matthew.nunez@nxp.com>
Signed-off-by: Phu Luu An <phu.luuan@nxp.com>
Signed-off-by: Stefan-Gabriel Mirea <stefan-gabriel.mirea@nxp.com>
Signed-off-by: Larisa Grigore <larisa.grigore@nxp.com>
Signed-off-by: Ghennadi Procopciuc <Ghennadi.Procopciuc@nxp.com>
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@nxp.com>
Signed-off-by: Radu Pirea <radu-nicolae.pirea@nxp.com>
Signed-off-by: Chester Lin <clin@suse.com>

drivers/pinctrl/freescale/Kconfig

@@ -217,3 +217,19 @@ config PINCTRL_IMXRT1170
 	select PINCTRL_IMX
 	help
 	  Say Y here to enable the imxrt1170 pinctrl driver
+
+config PINCTRL_S32CC
+	bool "NXP S32 Common Chassis pinctrl driver core"
+	depends on ARCH_S32 && OF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	select GENERIC_PINCONF
+	help
+	  Say Y here to enable the NXP S32CC pinctrl driver core
+
+config PINCTRL_S32G
+	depends on ARCH_S32 && OF
+	bool "NXP S32G pinctrl driver"
+	select PINCTRL_S32CC
+	help
+	  Say Y here to enable the pinctrl driver for NXP 32G family SoCs

drivers/pinctrl/freescale/Makefile

@@ -33,3 +33,5 @@ obj-$(CONFIG_PINCTRL_IMX25)	+= pinctrl-imx25.o
 obj-$(CONFIG_PINCTRL_IMX28)	+= pinctrl-imx28.o
 obj-$(CONFIG_PINCTRL_IMXRT1050)	+= pinctrl-imxrt1050.o
 obj-$(CONFIG_PINCTRL_IMXRT1170)	+= pinctrl-imxrt1170.o
+obj-$(CONFIG_PINCTRL_S32CC)	+= pinctrl-s32cc.o
+obj-$(CONFIG_PINCTRL_S32G)	+= pinctrl-s32g.o

drivers/pinctrl/freescale/pinctrl-s32.h

@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * S32 pinmux core definitions
+ *
+ * Copyright 2016-2020,2022 NXP
+ * Copyright (C) 2012 Linaro Ltd.
+ */
+
+#ifndef __DRIVERS_PINCTRL_S32_H
+#define __DRIVERS_PINCTRL_S32_H
+
+struct platform_device;
+
+/**
+ * struct s32_pin_group - describes an S32 pin group
+ * @name: the name of this specific pin group
+ * @npins: the number of pins in this group array, i.e. the number of
+ *	elements in .pins so we can iterate over that array
+ * @pin_ids: an array of pin_ids in this group.
+ * @@pin_sss: an array of source signal select configs paired with pin_ids.
+ */
+struct s32_pin_group {
+	const char *name;
+	unsigned int npins;
+	unsigned int *pin_ids;
+	unsigned int *pin_sss;
+};
+
+/**
+ * struct s32_pmx_func - describes S32 pinmux functions
+ * @name: the name of this specific function
+ * @groups: corresponding pin groups
+ * @num_groups: the number of groups
+ */
+struct s32_pmx_func {
+	const char *name;
+	const char **groups;
+	unsigned int num_groups;
+};
+
+
+struct s32_pinctrl_soc_info {
+	struct device *dev;
+	const struct pinctrl_pin_desc *pins;
+	unsigned int npins;
+	struct s32_pin_group *groups;
+	unsigned int ngroups;
+	struct s32_pmx_func *functions;
+	unsigned int nfunctions;
+	unsigned int grp_index;
+	unsigned int mem_regions;
+};
+
+#define S32_PINCTRL_PIN(pin)	PINCTRL_PIN(pin, #pin)
+#define S32_MSCR_OFFSET	(0x240)
+#define S32_PAD_CONFIG(idx)	((idx) * 4)
+
+int s32_pinctrl_probe(struct platform_device *pdev,
+			struct s32_pinctrl_soc_info *info);
+int s32_pinctrl_remove(struct platform_device *pdev);
+#ifdef CONFIG_PM_SLEEP
+int s32_pinctrl_resume(struct device *dev);
+int s32_pinctrl_suspend(struct device *dev);
+#endif
+#endif /* __DRIVERS_PINCTRL_S32_H */