Initial commit

target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl8231.c

@@ -0,0 +1,342 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <asm/mach-rtl838x/mach-rtl83xx.h>
+
+/* RTL8231 registers for LED control */
+#define RTL8231_LED_FUNC0			0x0000
+#define RTL8231_GPIO_PIN_SEL(gpio)		((0x0002) + ((gpio) >> 4))
+#define RTL8231_GPIO_DIR(gpio)			((0x0005) + ((gpio) >> 4))
+#define RTL8231_GPIO_DATA(gpio)			((0x001C) + ((gpio) >> 4))
+
+#define USEC_TIMEOUT 5000
+
+struct rtl8231_gpios {
+	struct gpio_chip gc;
+	struct device *dev;
+	u32 id;
+	int smi_bus_id;
+	u16 reg_shadow[0x20];
+	u32 reg_cached;
+	int ext_gpio_indrt_access;
+};
+
+extern struct mutex smi_lock;
+extern struct rtl83xx_soc_info soc_info;
+
+static u32 rtl8231_read(struct rtl8231_gpios *gpios, u32 reg)
+{
+	u32 t = 0, n = 0;
+	u8 bus_id = gpios->smi_bus_id;
+
+	reg &= 0x1f;
+	bus_id &= 0x1f;
+
+	/* Calculate read register address */
+	t = (bus_id << 2) | (reg << 7);
+
+	/* Set execution bit: cleared when operation completed */
+	t |= 1;
+
+	// Start execution
+	sw_w32(t, gpios->ext_gpio_indrt_access);
+	do {
+		udelay(1);
+		t = sw_r32(gpios->ext_gpio_indrt_access);
+		n++;
+	} while ((t & 1) && (n < USEC_TIMEOUT));
+
+	if (n >= USEC_TIMEOUT)
+		return 0x80000000;
+	
+	pr_debug("%s: %x, %x, %x\n", __func__, bus_id, reg, (t & 0xffff0000) >> 16);
+
+	return (t & 0xffff0000) >> 16;
+}
+
+static int rtl8231_write(struct rtl8231_gpios *gpios, u32 reg, u32 data)
+{
+	u32 t = 0, n = 0;
+	u8 bus_id = gpios->smi_bus_id;
+
+	pr_debug("%s: %x, %x, %x\n", __func__, bus_id, reg, data);
+	reg &= 0x1f;
+	bus_id &= 0x1f;
+
+	t = (bus_id << 2) | (reg << 7) | (data << 16);
+	/* Set write bit */
+	t |= 2;
+
+	/* Set execution bit: cleared when operation completed */
+	t |= 1;
+
+	// Start execution
+	sw_w32(t, gpios->ext_gpio_indrt_access);
+	do {
+		udelay(1);
+		t = sw_r32(gpios->ext_gpio_indrt_access);
+	} while ((t & 1) && (n < USEC_TIMEOUT));
+
+	if (n >= USEC_TIMEOUT)
+		return -1;
+
+	return 0;
+}
+
+static u32 rtl8231_read_cached(struct rtl8231_gpios *gpios, u32 reg)
+{
+	if (reg > 0x1f)
+		return 0;
+
+	if (gpios->reg_cached & (1 << reg))
+		return gpios->reg_shadow[reg];
+
+	return rtl8231_read(gpios, reg);
+}
+
+/* Set Direction of the RTL8231 pin:
+ * dir 1: input
+ * dir 0: output
+ */
+static int rtl8231_pin_dir(struct rtl8231_gpios *gpios, u32 gpio, u32 dir)
+{
+	u32 v;
+	int pin_sel_addr = RTL8231_GPIO_PIN_SEL(gpio);
+	int pin_dir_addr = RTL8231_GPIO_DIR(gpio);
+	int dpin = gpio % 16;
+
+	if (gpio > 31) {
+		pr_debug("WARNING: HIGH pin\n");
+		dpin += 5;
+		pin_dir_addr = pin_sel_addr;
+	}
+
+	v = rtl8231_read_cached(gpios, pin_dir_addr);
+	if (v & 0x80000000) {
+		pr_err("Error reading RTL8231\n");
+		return -1;
+	}
+
+	v = (v & ~(1 << dpin)) | (dir << dpin);
+	rtl8231_write(gpios, pin_dir_addr, v);
+	gpios->reg_shadow[pin_dir_addr] = v;
+	gpios->reg_cached |= 1 << pin_dir_addr;
+	return 0;
+}
+
+static int rtl8231_pin_dir_get(struct rtl8231_gpios *gpios, u32 gpio, u32 *dir)
+{
+	/* dir 1: input
+	 * dir 0: output
+	 */
+
+	u32  v;
+	int pin_dir_addr = RTL8231_GPIO_DIR(gpio);
+	int pin = gpio % 16;
+
+	if (gpio > 31) {
+		pin_dir_addr = RTL8231_GPIO_PIN_SEL(gpio);
+		pin += 5;
+	}
+
+	v = rtl8231_read(gpios, pin_dir_addr);
+	if (v & (1 << pin))
+		*dir = 1;
+	else
+		*dir = 0;
+	return 0;
+}
+
+static int rtl8231_pin_set(struct rtl8231_gpios *gpios, u32 gpio, u32 data)
+{
+	u32 v = rtl8231_read(gpios, RTL8231_GPIO_DATA(gpio));
+
+	pr_debug("%s: %d to %d\n", __func__, gpio, data);
+	if (v & 0x80000000) {
+		pr_err("Error reading RTL8231\n");
+		return -1;
+	}
+	v = (v & ~(1 << (gpio % 16))) | (data << (gpio % 16));
+	rtl8231_write(gpios, RTL8231_GPIO_DATA(gpio), v);
+	gpios->reg_shadow[RTL8231_GPIO_DATA(gpio)] = v;
+	gpios->reg_cached |= 1 << RTL8231_GPIO_DATA(gpio);
+	return 0;
+}
+
+static int rtl8231_pin_get(struct rtl8231_gpios *gpios, u32 gpio, u16 *state)
+{
+	u32 v = rtl8231_read(gpios, RTL8231_GPIO_DATA(gpio));
+
+	if (v & 0x80000000) {
+		pr_err("Error reading RTL8231\n");
+		return -1;
+	}
+
+	*state = v & 0xffff;
+	return 0;
+}
+
+static int rtl8231_direction_input(struct gpio_chip *gc, unsigned int offset)
+{
+	int err;
+	struct rtl8231_gpios *gpios = gpiochip_get_data(gc);
+
+	pr_debug("%s: %d\n", __func__, offset);
+	mutex_lock(&smi_lock);
+	err = rtl8231_pin_dir(gpios, offset, 1);
+	mutex_unlock(&smi_lock);
+	return err;
+}
+
+static int rtl8231_direction_output(struct gpio_chip *gc, unsigned int offset, int value)
+{
+	int err;
+	struct rtl8231_gpios *gpios = gpiochip_get_data(gc);
+
+	pr_debug("%s: %d\n", __func__, offset);
+	mutex_lock(&smi_lock);
+	err = rtl8231_pin_dir(gpios, offset, 0);
+	mutex_unlock(&smi_lock);
+	if (!err)
+		err = rtl8231_pin_set(gpios, offset, value);
+	return err;
+}
+
+static int rtl8231_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+	u32 v = 0;
+	struct rtl8231_gpios *gpios = gpiochip_get_data(gc);
+
+	pr_debug("%s: %d\n", __func__, offset);
+	mutex_lock(&smi_lock);
+	rtl8231_pin_dir_get(gpios, offset, &v);
+	mutex_unlock(&smi_lock);
+	return v;
+}
+
+static int rtl8231_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+	u16 state = 0;
+	struct rtl8231_gpios *gpios = gpiochip_get_data(gc);
+
+	mutex_lock(&smi_lock);
+	rtl8231_pin_get(gpios, offset, &state);
+	mutex_unlock(&smi_lock);
+	if (state & (1 << (offset % 16)))
+		return 1;
+	return 0;
+}
+
+void rtl8231_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
+{
+	struct rtl8231_gpios *gpios = gpiochip_get_data(gc);
+
+	rtl8231_pin_set(gpios, offset, value);
+}
+
+int rtl8231_init(struct rtl8231_gpios *gpios)
+{
+	pr_info("%s called, MDIO bus ID: %d\n", __func__, gpios->smi_bus_id);
+
+	gpios->reg_cached = 0;
+
+	if (soc_info.family == RTL8390_FAMILY_ID) {
+		// RTL8390: Enable external gpio in global led control register
+		sw_w32_mask(0x7 << 18, 0x4 << 18, RTL839X_LED_GLB_CTRL);
+	} else if (soc_info.family == RTL8380_FAMILY_ID) {
+		// RTL8380: Enable RTL8231 indirect access mode
+		sw_w32_mask(0, 1, RTL838X_EXTRA_GPIO_CTRL);
+		sw_w32_mask(3, 1, RTL838X_DMY_REG5);
+	}
+
+	/* Select GPIO functionality and force input direction for pins 0-36 */
+	rtl8231_write(gpios, RTL8231_GPIO_PIN_SEL(0), 0xffff);
+	rtl8231_write(gpios, RTL8231_GPIO_DIR(0), 0xffff);
+	rtl8231_write(gpios, RTL8231_GPIO_PIN_SEL(16), 0xffff);
+	rtl8231_write(gpios, RTL8231_GPIO_DIR(16), 0xffff);
+	rtl8231_write(gpios, RTL8231_GPIO_PIN_SEL(32), 0x03ff);
+
+	/* Set LED_Start to enable drivers for output mode */
+	rtl8231_write(gpios, RTL8231_LED_FUNC0, 1 << 1);
+
+	return 0;
+}
+
+static const struct of_device_id rtl8231_gpio_of_match[] = {
+	{ .compatible = "realtek,rtl8231-gpio" },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, rtl8231_gpio_of_match);
+
+static int rtl8231_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct rtl8231_gpios *gpios;
+	int err;
+	u32 indirect_bus_id;
+
+	pr_info("Probing RTL8231 GPIOs\n");
+
+	if (!np) {
+		dev_err(&pdev->dev, "No DT found\n");
+		return -EINVAL;
+	}
+
+	gpios = devm_kzalloc(dev, sizeof(*gpios), GFP_KERNEL);
+	if (!gpios)
+		return -ENOMEM;
+
+	gpios->id = soc_info.id;
+	if (soc_info.family == RTL8380_FAMILY_ID) {
+		gpios->ext_gpio_indrt_access = RTL838X_EXT_GPIO_INDRT_ACCESS;
+	}
+
+	if (soc_info.family == RTL8390_FAMILY_ID) {
+		gpios->ext_gpio_indrt_access = RTL839X_EXT_GPIO_INDRT_ACCESS;
+	}
+
+	/*
+	 * We use a default MDIO bus ID for the 8231 of 0, which can be overriden
+	 * by the indirect-access-bus-id property in the dts.
+	 */
+	gpios->smi_bus_id = 0;
+	of_property_read_u32(np, "indirect-access-bus-id", &indirect_bus_id);
+	gpios->smi_bus_id = indirect_bus_id;
+
+	rtl8231_init(gpios);
+
+	gpios->dev = dev;
+	gpios->gc.base = 160;
+	gpios->gc.ngpio = 36;
+	gpios->gc.label = "rtl8231";
+	gpios->gc.parent = dev;
+	gpios->gc.owner = THIS_MODULE;
+	gpios->gc.can_sleep = true;
+
+	gpios->gc.direction_input = rtl8231_direction_input;
+	gpios->gc.direction_output = rtl8231_direction_output;
+	gpios->gc.set = rtl8231_gpio_set;
+	gpios->gc.get = rtl8231_gpio_get;
+	gpios->gc.get_direction = rtl8231_get_direction;
+
+	err = devm_gpiochip_add_data(dev, &gpios->gc, gpios);
+	return err;
+}
+
+static struct platform_driver rtl8231_gpio_driver = {
+	.driver = {
+		.name = "rtl8231-gpio",
+		.of_match_table	= rtl8231_gpio_of_match,
+	},
+	.probe = rtl8231_gpio_probe,
+};
+
+module_platform_driver(rtl8231_gpio_driver);
+
+MODULE_DESCRIPTION("Realtek RTL8231 GPIO expansion chip support");
+MODULE_LICENSE("GPL v2");

target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c

@@ -0,0 +1,425 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <asm/mach-rtl838x/mach-rtl83xx.h>
+
+/* RTL8231 registers for LED control */
+#define RTL8231_LED_FUNC0			0x0000
+#define RTL8231_GPIO_PIN_SEL(gpio)		((0x0002) + ((gpio) >> 4))
+#define RTL8231_GPIO_DIR(gpio)			((0x0005) + ((gpio) >> 4))
+#define RTL8231_GPIO_DATA(gpio)			((0x001C) + ((gpio) >> 4))
+
+struct rtl838x_gpios {
+	struct gpio_chip gc;
+	u32 id;
+	struct device *dev;
+	int irq;
+	int num_leds;
+	int min_led;
+	int leds_per_port;
+	u32 led_mode;
+	int led_glb_ctrl;
+	int led_sw_ctrl;
+	int (*led_sw_p_ctrl)(int port);
+	int (*led_sw_p_en_ctrl)(int port);
+	int (*ext_gpio_dir)(int i);
+	int (*ext_gpio_data)(int i);
+};
+
+inline int rtl838x_ext_gpio_dir(int i)
+{
+	return RTL838X_EXT_GPIO_DIR + ((i >>5) << 2);
+}
+
+inline int rtl839x_ext_gpio_dir(int i)
+{
+	return RTL839X_EXT_GPIO_DIR + ((i >>5) << 2);
+}
+
+inline int rtl838x_ext_gpio_data(int i)
+{
+	return RTL838X_EXT_GPIO_DATA + ((i >>5) << 2);
+}
+
+inline int rtl839x_ext_gpio_data(int i)
+{
+	return RTL839X_EXT_GPIO_DATA + ((i >>5) << 2);
+}
+
+inline int rtl838x_led_sw_p_ctrl(int p)
+{
+	return RTL838X_LED_SW_P_CTRL + (p << 2);
+}
+
+inline int rtl839x_led_sw_p_ctrl(int p)
+{
+	return RTL839X_LED_SW_P_CTRL + (p << 2);
+}
+
+inline int rtl838x_led_sw_p_en_ctrl(int p)
+{
+	return RTL838X_LED_SW_P_EN_CTRL + ((p / 10) << 2);
+}
+
+inline int rtl839x_led_sw_p_en_ctrl(int p)
+{
+	return RTL839X_LED_SW_P_EN_CTRL + ((p / 10) << 2);
+}
+
+extern struct mutex smi_lock;
+extern struct rtl83xx_soc_info soc_info;
+
+
+void rtl838x_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
+{
+	int bit;
+	struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
+
+	pr_debug("rtl838x_set: %d, value: %d\n", offset, value);
+	/* Internal GPIO of the RTL8380 */
+	if (offset < 32) {
+		if (value)
+			rtl83xx_w32_mask(0, BIT(offset), RTL838X_GPIO_PABC_DATA);
+		else
+			rtl83xx_w32_mask(BIT(offset), 0, RTL838X_GPIO_PABC_DATA);
+	}
+
+	/* LED driver for PWR and SYS */
+	if (offset >= 32 && offset < 64) {
+		bit = offset - 32;
+		if (value)
+			sw_w32_mask(0, BIT(bit), gpios->led_glb_ctrl);
+		else
+			sw_w32_mask(BIT(bit), 0, gpios->led_glb_ctrl);
+		return;
+	}
+
+	bit = (offset - 64) % 32;
+	/* First Port-LED */
+	if (offset >= 64 && offset < 96
+	   && offset >= (64 + gpios->min_led)
+	   && offset < (64 + gpios->min_led + gpios->num_leds)) {
+		if (value)
+			sw_w32_mask(7, 5, gpios->led_sw_p_ctrl(bit));
+		else
+			sw_w32_mask(7, 0, gpios->led_sw_p_ctrl(bit));
+	}
+	if (offset >= 96 && offset < 128
+	    && offset >= (96 + gpios->min_led)
+	    && offset < (96 + gpios->min_led + gpios->num_leds)) {
+		if (value)
+			sw_w32_mask(7 << 3, 5 << 3, gpios->led_sw_p_ctrl(bit));
+		else
+			sw_w32_mask(7 << 3, 0, gpios->led_sw_p_ctrl(bit));
+	}
+	if (offset >= 128 && offset < 160
+	    && offset >= (128 + gpios->min_led)
+	    && offset < (128 + gpios->min_led + gpios->num_leds)) {
+		if (value)
+			sw_w32_mask(7 << 6, 5 << 6, gpios->led_sw_p_ctrl(bit));
+		else
+			sw_w32_mask(7 << 6, 0, gpios->led_sw_p_ctrl(bit));
+	}
+	__asm__ volatile ("sync");
+}
+
+static int rtl838x_direction_input(struct gpio_chip *gc, unsigned int offset)
+{
+	pr_debug("%s: %d\n", __func__, offset);
+
+	if (offset < 32) {
+		rtl83xx_w32_mask(BIT(offset), 0, RTL838X_GPIO_PABC_DIR);
+		return 0;
+	}
+
+	/* Internal LED driver does not support input */
+	return -ENOTSUPP;
+}
+
+static int rtl838x_direction_output(struct gpio_chip *gc, unsigned int offset, int value)
+{
+	pr_debug("%s: %d\n", __func__, offset);
+	if (offset < 32)
+		rtl83xx_w32_mask(0, BIT(offset), RTL838X_GPIO_PABC_DIR);
+	rtl838x_gpio_set(gc, offset, value);
+
+	/* LED for PWR and SYS driver is direction output by default */
+	return 0;
+}
+
+static int rtl838x_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+	u32 v = 0;
+
+	pr_debug("%s: %d\n", __func__, offset);
+	if (offset < 32) {
+		v = rtl83xx_r32(RTL838X_GPIO_PABC_DIR);
+		if (v & BIT(offset))
+			return 0;
+		return 1;
+	}
+
+	/* LED driver for PWR and SYS is direction output by default */
+	if (offset >= 32 && offset < 64)
+		return 0;
+
+	return 0;
+}
+
+static int rtl838x_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+	u32 v;
+	struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
+
+	pr_debug("%s: %d\n", __func__, offset);
+
+	/* Internal GPIO of the RTL8380 */
+	if (offset < 32) {
+		v = rtl83xx_r32(RTL838X_GPIO_PABC_DATA);
+		if (v & BIT(offset))
+			return 1;
+		return 0;
+	}
+
+	/* LED driver for PWR and SYS */
+	if (offset >= 32 && offset < 64) {
+		v = sw_r32(gpios->led_glb_ctrl);
+		if (v & BIT(offset-32))
+			return 1;
+		return 0;
+	}
+
+/* BUG:
+	bit = (offset - 64) % 32;
+	if (offset >= 64 && offset < 96) {
+		if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
+			return 1;
+		return 0;
+	}
+	if (offset >= 96 && offset < 128) {
+		if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
+			return 1;
+		return 0;
+	}
+	if (offset >= 128 && offset < 160) {
+		if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
+			return 1;
+		return 0;
+	}
+	*/ 
+	return 0;
+}
+
+void rtl8380_led_test(struct rtl838x_gpios *gpios, u32 mask)
+{
+	int i;
+	u32 led_gbl = sw_r32(gpios->led_glb_ctrl);
+	u32 mode_sel, led_p_en;
+
+	if (soc_info.family == RTL8380_FAMILY_ID) {
+		mode_sel = sw_r32(RTL838X_LED_MODE_SEL);
+		led_p_en = sw_r32(RTL838X_LED_P_EN_CTRL);
+	}
+
+	/* 2 Leds for ports 0-23 and 24-27, 3 would be 0x7 */
+	sw_w32_mask(0x3f, 0x3 | (0x3 << 3), gpios->led_glb_ctrl);
+
+	if(soc_info.family == RTL8380_FAMILY_ID) {
+		/* Enable all leds */
+		sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
+	}
+	/* Enable software control of all leds */
+	sw_w32(0xFFFFFFF, gpios->led_sw_ctrl);
+	sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(0));
+	sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(10));
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
+
+	for (i = 0; i < 28; i++) {
+		if (mask & BIT(i))
+			sw_w32(5 | (5 << 3) | (5 << 6), gpios->led_sw_p_ctrl(i));
+	}
+	msleep(3000);
+
+	if (soc_info.family == RTL8380_FAMILY_ID)
+		sw_w32(led_p_en, RTL838X_LED_P_EN_CTRL);
+	/* Disable software control of all leds */
+	sw_w32(0x0000000, gpios->led_sw_ctrl);
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(0));
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(10));
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
+
+	sw_w32(led_gbl, gpios->led_glb_ctrl);
+	if (soc_info.family == RTL8380_FAMILY_ID)
+		sw_w32(mode_sel, RTL838X_LED_MODE_SEL);
+}
+
+void take_port_leds(struct rtl838x_gpios *gpios)
+{
+	int leds_per_port = gpios->leds_per_port;
+	int mode = gpios->led_mode;
+
+	pr_info("%s, %d, %x\n", __func__, leds_per_port, mode);
+	pr_debug("Bootloader settings: %x %x %x\n",
+		sw_r32(gpios->led_sw_p_en_ctrl(0)),
+		sw_r32(gpios->led_sw_p_en_ctrl(10)),
+		sw_r32(gpios->led_sw_p_en_ctrl(20))
+	);
+
+	if (soc_info.family == RTL8380_FAMILY_ID) {
+		pr_debug("led glb: %x, sel %x\n",
+			sw_r32(gpios->led_glb_ctrl), sw_r32(RTL838X_LED_MODE_SEL));
+		pr_debug("RTL838X_LED_P_EN_CTRL: %x", sw_r32(RTL838X_LED_P_EN_CTRL));
+		pr_debug("RTL838X_LED_MODE_CTRL: %x", sw_r32(RTL838X_LED_MODE_CTRL));
+		sw_w32_mask(3, 0, RTL838X_LED_MODE_SEL);
+		sw_w32(mode, RTL838X_LED_MODE_CTRL);
+	}
+
+	/* Enable software control of all leds */
+	sw_w32(0xFFFFFFF, gpios->led_sw_ctrl);
+	if (soc_info.family == RTL8380_FAMILY_ID)
+		sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
+
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(0));
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(10));
+	sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
+
+	sw_w32_mask(0x3f, 0, gpios->led_glb_ctrl);
+	switch (leds_per_port) {
+	case 3:
+		sw_w32_mask(0, 0x7 | (0x7 << 3), gpios->led_glb_ctrl);
+		sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(20));
+		/* FALLTHRU */
+	case 2:
+		sw_w32_mask(0, 0x3 | (0x3 << 3), gpios->led_glb_ctrl);
+		sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(10));
+		/* FALLTHRU */
+	case 1:
+		sw_w32_mask(0, 0x1 | (0x1 << 3), gpios->led_glb_ctrl);
+		sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(0));
+		break;
+	default:
+		pr_err("No LEDS configured for software control\n");
+	}
+}
+
+static const struct of_device_id rtl838x_gpio_of_match[] = {
+	{ .compatible = "realtek,rtl838x-gpio" },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, rtl838x_gpio_of_match);
+
+static int rtl838x_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct rtl838x_gpios *gpios;
+	int err;
+
+	pr_info("Probing RTL838X GPIOs\n");
+
+	if (!np) {
+		dev_err(&pdev->dev, "No DT found\n");
+		return -EINVAL;
+	}
+
+	gpios = devm_kzalloc(dev, sizeof(*gpios), GFP_KERNEL);
+	if (!gpios)
+		return -ENOMEM;
+
+	gpios->id = soc_info.id;
+
+	switch (gpios->id) {
+	case 0x8332:
+		pr_debug("Found RTL8332M GPIO\n");
+		break;
+	case 0x8380:
+		pr_debug("Found RTL8380M GPIO\n");
+		break;
+	case 0x8381:
+		pr_debug("Found RTL8381M GPIO\n");
+		break;
+	case 0x8382:
+		pr_debug("Found RTL8382M GPIO\n");
+		break;
+	case 0x8391:
+		pr_debug("Found RTL8391 GPIO\n");
+		break;
+	case 0x8393:
+		pr_debug("Found RTL8393 GPIO\n");
+		break;
+	default:
+		pr_err("Unknown GPIO chip id (%04x)\n", gpios->id);
+		return -ENODEV;
+	}
+
+	if (soc_info.family == RTL8380_FAMILY_ID) {
+		gpios->led_glb_ctrl = RTL838X_LED_GLB_CTRL;
+		gpios->led_sw_ctrl = RTL838X_LED_SW_CTRL;
+		gpios->led_sw_p_ctrl = rtl838x_led_sw_p_ctrl;
+		gpios->led_sw_p_en_ctrl = rtl838x_led_sw_p_en_ctrl;
+		gpios->ext_gpio_dir = rtl838x_ext_gpio_dir;
+		gpios->ext_gpio_data = rtl838x_ext_gpio_data;
+	}
+
+	if (soc_info.family == RTL8390_FAMILY_ID) {
+		gpios->led_glb_ctrl = RTL839X_LED_GLB_CTRL;
+		gpios->led_sw_ctrl = RTL839X_LED_SW_CTRL;
+		gpios->led_sw_p_ctrl = rtl839x_led_sw_p_ctrl;
+		gpios->led_sw_p_en_ctrl = rtl839x_led_sw_p_en_ctrl;
+		gpios->ext_gpio_dir = rtl839x_ext_gpio_dir;
+		gpios->ext_gpio_data = rtl839x_ext_gpio_data;
+	}
+
+	gpios->dev = dev;
+	gpios->gc.base = 0;
+	/* 0-31: internal
+	 * 32-63, LED control register
+	 * 64-95: PORT-LED 0
+	 * 96-127: PORT-LED 1
+	 * 128-159: PORT-LED 2
+	 */
+	gpios->gc.ngpio = 160;
+	gpios->gc.label = "rtl838x";
+	gpios->gc.parent = dev;
+	gpios->gc.owner = THIS_MODULE;
+	gpios->gc.can_sleep = true;
+	gpios->irq = 31;
+
+	gpios->gc.direction_input = rtl838x_direction_input;
+	gpios->gc.direction_output = rtl838x_direction_output;
+	gpios->gc.set = rtl838x_gpio_set;
+	gpios->gc.get = rtl838x_gpio_get;
+	gpios->gc.get_direction = rtl838x_get_direction;
+
+	if (of_property_read_bool(np, "take-port-leds")) {
+		if (of_property_read_u32(np, "leds-per-port", &gpios->leds_per_port))
+			gpios->leds_per_port = 2;
+		if (of_property_read_u32(np, "led-mode", &gpios->led_mode))
+			gpios->led_mode = (0x1ea << 15) | 0x1ea;
+		if (of_property_read_u32(np, "num-leds", &gpios->num_leds))
+			gpios->num_leds = 32;
+		if (of_property_read_u32(np, "min-led", &gpios->min_led))
+			gpios->min_led = 0;
+		take_port_leds(gpios);
+	}
+
+	err = devm_gpiochip_add_data(dev, &gpios->gc, gpios);
+	return err;
+}
+
+static struct platform_driver rtl838x_gpio_driver = {
+	.driver = {
+		.name = "rtl838x-gpio",
+		.of_match_table	= rtl838x_gpio_of_match,
+	},
+	.probe = rtl838x_gpio_probe,
+};
+
+module_platform_driver(rtl838x_gpio_driver);
+
+MODULE_DESCRIPTION("Realtek RTL838X GPIO API support");
+MODULE_LICENSE("GPL v2");