pinctrl: rk805: Add rk816 pinctrl support

This adds support for RK816 to the exising rk805 pinctrl driver

It has a single pin which can be configured as input from a thermistor (for
instance in an attached battery) or as a gpio.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240416161237.2500037-4-knaerzche@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: knaerzche

drivers/pinctrl/pinctrl-rk805.c

@@ -93,6 +93,11 @@ enum rk806_pinmux_option {
 	RK806_PINMUX_FUN5,
 };
 
+enum rk816_pinmux_option {
+	RK816_PINMUX_THERMISTOR,
+	RK816_PINMUX_GPIO,
+};
+
 enum {
 	RK805_GPIO0,
 	RK805_GPIO1,
@@ -104,6 +109,10 @@ enum {
 	RK806_GPIO_DVS3
 };
 
+enum {
+	RK816_GPIO0,
+};
+
 static const char *const rk805_gpio_groups[] = {
 	"gpio0",
 	"gpio1",
@@ -115,6 +124,10 @@ static const char *const rk806_gpio_groups[] = {
 	"gpio_pwrctrl3",
 };
 
+static const char *const rk816_gpio_groups[] = {
+	"gpio0",
+};
+
 /* RK805: 2 output only GPIOs */
 static const struct pinctrl_pin_desc rk805_pins_desc[] = {
 	PINCTRL_PIN(RK805_GPIO0, "gpio0"),
@@ -128,6 +141,11 @@ static const struct pinctrl_pin_desc rk806_pins_desc[] = {
 	PINCTRL_PIN(RK806_GPIO_DVS3, "gpio_pwrctrl3"),
 };
 
+/* RK816 */
+static const struct pinctrl_pin_desc rk816_pins_desc[] = {
+	PINCTRL_PIN(RK816_GPIO0, "gpio0"),
+};
+
 static const struct rk805_pin_function rk805_pin_functions[] = {
 	{
 		.name = "gpio",
@@ -176,6 +194,21 @@ static const struct rk805_pin_function rk806_pin_functions[] = {
 	},
 };
 
+static const struct rk805_pin_function rk816_pin_functions[] = {
+	{
+		.name = "gpio",
+		.groups = rk816_gpio_groups,
+		.ngroups = ARRAY_SIZE(rk816_gpio_groups),
+		.mux_option = RK816_PINMUX_GPIO,
+	},
+	{
+		.name = "thermistor",
+		.groups = rk816_gpio_groups,
+		.ngroups = ARRAY_SIZE(rk816_gpio_groups),
+		.mux_option = RK816_PINMUX_THERMISTOR,
+	},
+};
+
 static const struct rk805_pin_group rk805_pin_groups[] = {
 	{
 		.name = "gpio0",
@@ -207,6 +240,14 @@ static const struct rk805_pin_group rk806_pin_groups[] = {
 	}
 };
 
+static const struct rk805_pin_group rk816_pin_groups[] = {
+	{
+		.name = "gpio0",
+		.pins = { RK816_GPIO0 },
+		.npins = 1,
+	},
+};
+
 #define RK805_GPIO0_VAL_MSK	BIT(0)
 #define RK805_GPIO1_VAL_MSK	BIT(1)
 
@@ -255,6 +296,20 @@ static struct rk805_pin_config rk806_gpio_cfgs[] = {
 	}
 };
 
+#define RK816_FUN_MASK		BIT(2)
+#define RK816_VAL_MASK		BIT(3)
+#define RK816_DIR_MASK		BIT(4)
+
+static struct rk805_pin_config rk816_gpio_cfgs[] = {
+	{
+		.fun_reg = RK818_IO_POL_REG,
+		.fun_msk = RK816_FUN_MASK,
+		.reg = RK818_IO_POL_REG,
+		.val_msk = RK816_VAL_MASK,
+		.dir_msk = RK816_DIR_MASK,
+	},
+};
+
 /* generic gpio chip */
 static int rk805_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
@@ -439,6 +494,8 @@ static int rk805_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
 		return _rk805_pinctrl_set_mux(pctldev, offset, RK805_PINMUX_GPIO);
 	case RK806_ID:
 		return _rk805_pinctrl_set_mux(pctldev, offset, RK806_PINMUX_FUN5);
+	case RK816_ID:
+		return _rk805_pinctrl_set_mux(pctldev, offset, RK816_PINMUX_GPIO);
 	}
 
 	return -ENOTSUPP;
@@ -588,6 +645,18 @@ static int rk805_pinctrl_probe(struct platform_device *pdev)
 		pci->pin_cfg = rk806_gpio_cfgs;
 		pci->gpio_chip.ngpio = ARRAY_SIZE(rk806_gpio_cfgs);
 		break;
+	case RK816_ID:
+		pci->pins = rk816_pins_desc;
+		pci->num_pins = ARRAY_SIZE(rk816_pins_desc);
+		pci->functions = rk816_pin_functions;
+		pci->num_functions = ARRAY_SIZE(rk816_pin_functions);
+		pci->groups = rk816_pin_groups;
+		pci->num_pin_groups = ARRAY_SIZE(rk816_pin_groups);
+		pci->pinctrl_desc.pins = rk816_pins_desc;
+		pci->pinctrl_desc.npins = ARRAY_SIZE(rk816_pins_desc);
+		pci->pin_cfg = rk816_gpio_cfgs;
+		pci->gpio_chip.ngpio = ARRAY_SIZE(rk816_gpio_cfgs);
+		break;
 	default:
 		dev_err(&pdev->dev, "unsupported RK805 ID %lu\n",
 			pci->rk808->variant);