pinctrl: sunxi: Add support for the Allwinner H616-R pin controller

There are only two pins left now, used to connect to the PMIC via I2C.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Link: https://lore.kernel.org/r/20210118020848.11721-6-andre.przywara@arm.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sunxi/Kconfig

@@ -124,4 +124,9 @@ config PINCTRL_SUN50I_H616
 	default ARM64 && ARCH_SUNXI
 	select PINCTRL_SUNXI
 
+config PINCTRL_SUN50I_H616_R
+	bool "Support for the Allwinner H616 R-PIO"
+	default ARM64 && ARCH_SUNXI
+	select PINCTRL_SUNXI
+
 endif

drivers/pinctrl/sunxi/Makefile

@@ -24,5 +24,6 @@ obj-$(CONFIG_PINCTRL_SUN50I_H5)		+= pinctrl-sun50i-h5.o
 obj-$(CONFIG_PINCTRL_SUN50I_H6)		+= pinctrl-sun50i-h6.o
 obj-$(CONFIG_PINCTRL_SUN50I_H6_R)	+= pinctrl-sun50i-h6-r.o
 obj-$(CONFIG_PINCTRL_SUN50I_H616)	+= pinctrl-sun50i-h616.o
+obj-$(CONFIG_PINCTRL_SUN50I_H616_R)	+= pinctrl-sun50i-h616-r.o
 obj-$(CONFIG_PINCTRL_SUN9I_A80)		+= pinctrl-sun9i-a80.o
 obj-$(CONFIG_PINCTRL_SUN9I_A80_R)	+= pinctrl-sun9i-a80-r.o

drivers/pinctrl/sunxi/pinctrl-sun50i-h616-r.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Allwinner H616 R_PIO pin controller driver
+ *
+ * Copyright (C) 2020 Arm Ltd.
+ * Based on former work, which is:
+ *   Copyright (C) 2017 Icenowy Zheng <icenowy@aosc.io>
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/reset.h>
+
+#include "pinctrl-sunxi.h"
+
+static const struct sunxi_desc_pin sun50i_h616_r_pins[] = {
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_rsb"),		/* SCK */
+		  SUNXI_FUNCTION(0x3, "s_i2c")),	/* SCK */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_rsb"),		/* SDA */
+		  SUNXI_FUNCTION(0x3, "s_i2c")),	/* SDA */
+};
+
+static const struct sunxi_pinctrl_desc sun50i_h616_r_pinctrl_data = {
+	.pins = sun50i_h616_r_pins,
+	.npins = ARRAY_SIZE(sun50i_h616_r_pins),
+	.pin_base = PL_BASE,
+};
+
+static int sun50i_h616_r_pinctrl_probe(struct platform_device *pdev)
+{
+	return sunxi_pinctrl_init(pdev,
+				  &sun50i_h616_r_pinctrl_data);
+}
+
+static const struct of_device_id sun50i_h616_r_pinctrl_match[] = {
+	{ .compatible = "allwinner,sun50i-h616-r-pinctrl", },
+	{}
+};
+
+static struct platform_driver sun50i_h616_r_pinctrl_driver = {
+	.probe	= sun50i_h616_r_pinctrl_probe,
+	.driver	= {
+		.name		= "sun50i-h616-r-pinctrl",
+		.of_match_table	= sun50i_h616_r_pinctrl_match,
+	},
+};
+builtin_platform_driver(sun50i_h616_r_pinctrl_driver);