drivers/net/dsa/qca/qca8k-leds.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 #include <linux/property.h>
 #include <linux/regmap.h>
 #include <net/dsa.h>

 #include "qca8k.h"
 #include "qca8k_leds.h"

 static u32 qca8k_phy_to_port(int phy)
 {
 	/* Internal PHY 0 has port at index 1.
 	 * Internal PHY 1 has port at index 2.
 	 * Internal PHY 2 has port at index 3.
 	 * Internal PHY 3 has port at index 4.
 	 * Internal PHY 4 has port at index 5.
 	 */

 	return phy + 1;
 }

 static int
 qca8k_get_enable_led_reg(int port_num, int led_num, struct qca8k_led_pattern_en *reg_info)
 {
 	switch (port_num) {
 	case 0:
 		reg_info->reg = QCA8K_LED_CTRL_REG(led_num);
 		reg_info->shift = QCA8K_LED_PHY0123_CONTROL_RULE_SHIFT;
 		break;
 	case 1:
 	case 2:
 	case 3:
 		/* Port 123 are controlled on a different reg */
 		reg_info->reg = QCA8K_LED_CTRL3_REG;
 		reg_info->shift = QCA8K_LED_PHY123_PATTERN_EN_SHIFT(port_num, led_num);
 		break;
 	case 4:
 		reg_info->reg = QCA8K_LED_CTRL_REG(led_num);
 		reg_info->shift = QCA8K_LED_PHY4_CONTROL_RULE_SHIFT;
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static int
 qca8k_get_control_led_reg(int port_num, int led_num, struct qca8k_led_pattern_en *reg_info)
 {
 	reg_info->reg = QCA8K_LED_CTRL_REG(led_num);

 	/* 6 total control rule:
 	 * 3 control rules for phy0-3 that applies to all their leds
 	 * 3 control rules for phy4
 	 */
 	if (port_num == 4)
 		reg_info->shift = QCA8K_LED_PHY4_CONTROL_RULE_SHIFT;
 	else
 		reg_info->shift = QCA8K_LED_PHY0123_CONTROL_RULE_SHIFT;

 	return 0;
 }

 static int
 qca8k_parse_netdev(unsigned long rules, u32 *offload_trigger)
 {
 	/* Parsing specific to netdev trigger */
 	if (test_bit(TRIGGER_NETDEV_TX, &rules))
 		*offload_trigger |= QCA8K_LED_TX_BLINK_MASK;
 	if (test_bit(TRIGGER_NETDEV_RX, &rules))
 		*offload_trigger |= QCA8K_LED_RX_BLINK_MASK;
 	if (test_bit(TRIGGER_NETDEV_LINK_10, &rules))
 		*offload_trigger |= QCA8K_LED_LINK_10M_EN_MASK;
 	if (test_bit(TRIGGER_NETDEV_LINK_100, &rules))
 		*offload_trigger |= QCA8K_LED_LINK_100M_EN_MASK;
 	if (test_bit(TRIGGER_NETDEV_LINK_1000, &rules))
 		*offload_trigger |= QCA8K_LED_LINK_1000M_EN_MASK;
 	if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &rules))
 		*offload_trigger |= QCA8K_LED_HALF_DUPLEX_MASK;
 	if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &rules))
 		*offload_trigger |= QCA8K_LED_FULL_DUPLEX_MASK;

 	if (rules && !*offload_trigger)
 		return -EOPNOTSUPP;

 	/* Enable some default rule by default to the requested mode:
 	 * - Blink at 4Hz by default
 	 */
 	*offload_trigger |= QCA8K_LED_BLINK_4HZ;

 	return 0;
 }

 static int
 qca8k_led_brightness_set(struct qca8k_led *led,
 			 enum led_brightness brightness)
 {
 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;
 	u32 mask, val;

 	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

 	val = QCA8K_LED_ALWAYS_OFF;
 	if (brightness)
 		val = QCA8K_LED_ALWAYS_ON;

 	/* HW regs to control brightness is special and port 1-2-3
 	 * are placed in a different reg.
 	 *
 	 * To control port 0 brightness:
 	 * - the 2 bit (15, 14) of:
 	 *   - QCA8K_LED_CTRL0_REG for led1
 	 *   - QCA8K_LED_CTRL1_REG for led2
 	 *   - QCA8K_LED_CTRL2_REG for led3
 	 *
 	 * To control port 4:
 	 * - the 2 bit (31, 30) of:
 	 *   - QCA8K_LED_CTRL0_REG for led1
 	 *   - QCA8K_LED_CTRL1_REG for led2
 	 *   - QCA8K_LED_CTRL2_REG for led3
 	 *
 	 * To control port 1:
 	 *   - the 2 bit at (9, 8) of QCA8K_LED_CTRL3_REG are used for led1
 	 *   - the 2 bit at (11, 10) of QCA8K_LED_CTRL3_REG are used for led2
 	 *   - the 2 bit at (13, 12) of QCA8K_LED_CTRL3_REG are used for led3
 	 *
 	 * To control port 2:
 	 *   - the 2 bit at (15, 14) of QCA8K_LED_CTRL3_REG are used for led1
 	 *   - the 2 bit at (17, 16) of QCA8K_LED_CTRL3_REG are used for led2
 	 *   - the 2 bit at (19, 18) of QCA8K_LED_CTRL3_REG are used for led3
 	 *
 	 * To control port 3:
 	 *   - the 2 bit at (21, 20) of QCA8K_LED_CTRL3_REG are used for led1
 	 *   - the 2 bit at (23, 22) of QCA8K_LED_CTRL3_REG are used for led2
 	 *   - the 2 bit at (25, 24) of QCA8K_LED_CTRL3_REG are used for led3
 	 *
 	 * To abstract this and have less code, we use the port and led numm
 	 * to calculate the shift and the correct reg due to this problem of
 	 * not having a 1:1 map of LED with the regs.
 	 */
 	if (led->port_num == 0 || led->port_num == 4) {
 		mask = QCA8K_LED_PATTERN_EN_MASK;
 		val <<= QCA8K_LED_PATTERN_EN_SHIFT;
 	} else {
 		mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
 	}

 	return regmap_update_bits(priv->regmap, reg_info.reg,
 				  mask << reg_info.shift,
 				  val << reg_info.shift);
 }

 static int
 qca8k_cled_brightness_set_blocking(struct led_classdev *ldev,
 				   enum led_brightness brightness)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);

 	return qca8k_led_brightness_set(led, brightness);
 }

 static enum led_brightness
 qca8k_led_brightness_get(struct qca8k_led *led)
 {
 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;
 	u32 val;
 	int ret;

 	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

 	ret = regmap_read(priv->regmap, reg_info.reg, &val);
 	if (ret)
 		return 0;

 	val >>= reg_info.shift;

 	if (led->port_num == 0 || led->port_num == 4) {
 		val &= QCA8K_LED_PATTERN_EN_MASK;
 		val >>= QCA8K_LED_PATTERN_EN_SHIFT;
 	} else {
 		val &= QCA8K_LED_PHY123_PATTERN_EN_MASK;
 	}

 	/* Assume brightness ON only when the LED is set to always ON */
 	return val == QCA8K_LED_ALWAYS_ON;
 }

 static int
 qca8k_cled_blink_set(struct led_classdev *ldev,
 		     unsigned long *delay_on,
 		     unsigned long *delay_off)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
 	u32 mask, val = QCA8K_LED_ALWAYS_BLINK_4HZ;
 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;

 	if (*delay_on == 0 && *delay_off == 0) {
 		*delay_on = 125;
 		*delay_off = 125;
 	}

 	if (*delay_on != 125 || *delay_off != 125) {
 		/* The hardware only supports blinking at 4Hz. Fall back
 		 * to software implementation in other cases.
 		 */
 		return -EINVAL;
 	}

 	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

 	if (led->port_num == 0 || led->port_num == 4) {
 		mask = QCA8K_LED_PATTERN_EN_MASK;
 		val <<= QCA8K_LED_PATTERN_EN_SHIFT;
 	} else {
 		mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
 	}

 	regmap_update_bits(priv->regmap, reg_info.reg, mask << reg_info.shift,
 			   val << reg_info.shift);

 	return 0;
 }

 static int
 qca8k_cled_trigger_offload(struct led_classdev *ldev, bool enable)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);

 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;
 	u32 mask, val = QCA8K_LED_ALWAYS_OFF;

 	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

 	if (enable)
 		val = QCA8K_LED_RULE_CONTROLLED;

 	if (led->port_num == 0 || led->port_num == 4) {
 		mask = QCA8K_LED_PATTERN_EN_MASK;
 		val <<= QCA8K_LED_PATTERN_EN_SHIFT;
 	} else {
 		mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
 	}

 	return regmap_update_bits(priv->regmap, reg_info.reg, mask << reg_info.shift,
 				  val << reg_info.shift);
 }

 static bool
 qca8k_cled_hw_control_status(struct led_classdev *ldev)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);

 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;
 	u32 val;

 	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

 	regmap_read(priv->regmap, reg_info.reg, &val);

 	val >>= reg_info.shift;

 	if (led->port_num == 0 || led->port_num == 4) {
 		val &= QCA8K_LED_PATTERN_EN_MASK;
 		val >>= QCA8K_LED_PATTERN_EN_SHIFT;
 	} else {
 		val &= QCA8K_LED_PHY123_PATTERN_EN_MASK;
 	}

 	return val == QCA8K_LED_RULE_CONTROLLED;
 }

 static int
 qca8k_cled_hw_control_is_supported(struct led_classdev *ldev, unsigned long rules)
 {
 	u32 offload_trigger = 0;

 	return qca8k_parse_netdev(rules, &offload_trigger);
 }

 static int
 qca8k_cled_hw_control_set(struct led_classdev *ldev, unsigned long rules)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;
 	u32 offload_trigger = 0;
 	int ret;

 	ret = qca8k_parse_netdev(rules, &offload_trigger);
 	if (ret)
 		return ret;

 	ret = qca8k_cled_trigger_offload(ldev, true);
 	if (ret)
 		return ret;

 	qca8k_get_control_led_reg(led->port_num, led->led_num, &reg_info);

 	return regmap_update_bits(priv->regmap, reg_info.reg,
 				  QCA8K_LED_RULE_MASK << reg_info.shift,
 				  offload_trigger << reg_info.shift);
 }

 static int
 qca8k_cled_hw_control_get(struct led_classdev *ldev, unsigned long *rules)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
 	struct qca8k_led_pattern_en reg_info;
 	struct qca8k_priv *priv = led->priv;
 	u32 val;
 	int ret;

 	/* With hw control not active return err */
 	if (!qca8k_cled_hw_control_status(ldev))
 		return -EINVAL;

 	qca8k_get_control_led_reg(led->port_num, led->led_num, &reg_info);

 	ret = regmap_read(priv->regmap, reg_info.reg, &val);
 	if (ret)
 		return ret;

 	val >>= reg_info.shift;
 	val &= QCA8K_LED_RULE_MASK;

 	/* Parsing specific to netdev trigger */
 	if (val & QCA8K_LED_TX_BLINK_MASK)
 		set_bit(TRIGGER_NETDEV_TX, rules);
 	if (val & QCA8K_LED_RX_BLINK_MASK)
 		set_bit(TRIGGER_NETDEV_RX, rules);
 	if (val & QCA8K_LED_LINK_10M_EN_MASK)
 		set_bit(TRIGGER_NETDEV_LINK_10, rules);
 	if (val & QCA8K_LED_LINK_100M_EN_MASK)
 		set_bit(TRIGGER_NETDEV_LINK_100, rules);
 	if (val & QCA8K_LED_LINK_1000M_EN_MASK)
 		set_bit(TRIGGER_NETDEV_LINK_1000, rules);
 	if (val & QCA8K_LED_HALF_DUPLEX_MASK)
 		set_bit(TRIGGER_NETDEV_HALF_DUPLEX, rules);
 	if (val & QCA8K_LED_FULL_DUPLEX_MASK)
 		set_bit(TRIGGER_NETDEV_FULL_DUPLEX, rules);

 	return 0;
 }

 static struct device *qca8k_cled_hw_control_get_device(struct led_classdev *ldev)
 {
 	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
 	struct qca8k_priv *priv = led->priv;
 	struct dsa_port *dp;

 	dp = dsa_to_port(priv->ds, qca8k_phy_to_port(led->port_num));
 	if (!dp)
 		return NULL;
 	if (dp->user)
 		return &dp->user->dev;
 	return NULL;
 }

 static int
 qca8k_parse_port_leds(struct qca8k_priv *priv, struct fwnode_handle *port, int port_num)
 {
 	struct fwnode_handle *led = NULL, *leds = NULL;
 	struct led_init_data init_data = { };
 	enum led_default_state state;
 	struct qca8k_led *port_led;
 	int led_num, led_index;
 	int ret;

 	leds = fwnode_get_named_child_node(port, "leds");
 	if (!leds) {
 		dev_dbg(priv->dev, "No Leds node specified in device tree for port %d!\n",
 			port_num);
 		return 0;
 	}

 	fwnode_for_each_child_node(leds, led) {
 		/* Reg represent the led number of the port.
 		 * Each port can have at most 3 leds attached
 		 * Commonly:
 		 * 1. is gigabit led
 		 * 2. is mbit led
 		 * 3. additional status led
 		 */
 		if (fwnode_property_read_u32(led, "reg", &led_num))
 			continue;

 		if (led_num >= QCA8K_LED_PORT_COUNT) {
 			dev_warn(priv->dev, "Invalid LED reg %d defined for port %d",
 				 led_num, port_num);
 			continue;
 		}

 		led_index = QCA8K_LED_PORT_INDEX(port_num, led_num);

 		port_led = &priv->ports_led[led_index];
 		port_led->port_num = port_num;
 		port_led->led_num = led_num;
 		port_led->priv = priv;

 		state = led_init_default_state_get(led);
 		switch (state) {
 		case LEDS_DEFSTATE_ON:
 			port_led->cdev.brightness = 1;
 			qca8k_led_brightness_set(port_led, 1);
 			break;
 		case LEDS_DEFSTATE_KEEP:
 			port_led->cdev.brightness =
 					qca8k_led_brightness_get(port_led);
 			break;
 		default:
 			port_led->cdev.brightness = 0;
 			qca8k_led_brightness_set(port_led, 0);
 		}

 		port_led->cdev.max_brightness = 1;
 		port_led->cdev.brightness_set_blocking = qca8k_cled_brightness_set_blocking;
 		port_led->cdev.blink_set = qca8k_cled_blink_set;
 		port_led->cdev.hw_control_is_supported = qca8k_cled_hw_control_is_supported;
 		port_led->cdev.hw_control_set = qca8k_cled_hw_control_set;
 		port_led->cdev.hw_control_get = qca8k_cled_hw_control_get;
 		port_led->cdev.hw_control_get_device = qca8k_cled_hw_control_get_device;
 		port_led->cdev.hw_control_trigger = "netdev";
 		init_data.default_label = ":port";
 		init_data.fwnode = led;
 		init_data.devname_mandatory = true;
 		init_data.devicename = kasprintf(GFP_KERNEL, "%s:0%d",
 						 priv->internal_mdio_bus->id,
 						 port_num);
 		if (!init_data.devicename)
 			return -ENOMEM;

 		ret = devm_led_classdev_register_ext(priv->dev, &port_led->cdev, &init_data);
 		if (ret)
 			dev_warn(priv->dev, "Failed to init LED %d for port %d", led_num, port_num);

 		kfree(init_data.devicename);
 	}

 	return 0;
 }

 int
 qca8k_setup_led_ctrl(struct qca8k_priv *priv)
 {
 	struct fwnode_handle *ports, *port;
 	int port_num;
 	int ret;

 	ports = device_get_named_child_node(priv->dev, "ports");
 	if (!ports) {
 		dev_info(priv->dev, "No ports node specified in device tree!");
 		return 0;
 	}

 	fwnode_for_each_child_node(ports, port) {
 		if (fwnode_property_read_u32(port, "reg", &port_num))
 			continue;

 		/* Skip checking for CPU port 0 and CPU port 6 as not supported */
 		if (port_num == 0 || port_num == 6)
 			continue;

 		/* Each port can have at most 3 different leds attached.
 		 * Switch port starts from 0 to 6, but port 0 and 6 are CPU
 		 * port. The port index needs to be decreased by one to identify
 		 * the correct port for LED setup.
 		 */
 		ret = qca8k_parse_port_leds(priv, port, qca8k_port_to_phy(port_num));
 		if (ret)
 			return ret;
 	}

 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0
	#include <linux/property.h>
	#include <linux/regmap.h>
	#include <net/dsa.h>

	#include "qca8k.h"
	#include "qca8k_leds.h"

	static u32 qca8k_phy_to_port(int phy)
	{
	/* Internal PHY 0 has port at index 1.
	* Internal PHY 1 has port at index 2.
	* Internal PHY 2 has port at index 3.
	* Internal PHY 3 has port at index 4.
	* Internal PHY 4 has port at index 5.
	*/

	return phy + 1;
	}

	static int
	qca8k_get_enable_led_reg(int port_num, int led_num, struct qca8k_led_pattern_en *reg_info)
	{
	switch (port_num) {
	case 0:
	reg_info->reg = QCA8K_LED_CTRL_REG(led_num);
	reg_info->shift = QCA8K_LED_PHY0123_CONTROL_RULE_SHIFT;
	break;
	case 1:
	case 2:
	case 3:
	/* Port 123 are controlled on a different reg */
	reg_info->reg = QCA8K_LED_CTRL3_REG;
	reg_info->shift = QCA8K_LED_PHY123_PATTERN_EN_SHIFT(port_num, led_num);
	break;
	case 4:
	reg_info->reg = QCA8K_LED_CTRL_REG(led_num);
	reg_info->shift = QCA8K_LED_PHY4_CONTROL_RULE_SHIFT;
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static int
	qca8k_get_control_led_reg(int port_num, int led_num, struct qca8k_led_pattern_en *reg_info)
	{
	reg_info->reg = QCA8K_LED_CTRL_REG(led_num);

	/* 6 total control rule:
	* 3 control rules for phy0-3 that applies to all their leds
	* 3 control rules for phy4
	*/
	if (port_num == 4)
	reg_info->shift = QCA8K_LED_PHY4_CONTROL_RULE_SHIFT;
	else
	reg_info->shift = QCA8K_LED_PHY0123_CONTROL_RULE_SHIFT;

	return 0;
	}

	static int
	qca8k_parse_netdev(unsigned long rules, u32 *offload_trigger)
	{
	/* Parsing specific to netdev trigger */
	if (test_bit(TRIGGER_NETDEV_TX, &rules))
	*offload_trigger \|= QCA8K_LED_TX_BLINK_MASK;
	if (test_bit(TRIGGER_NETDEV_RX, &rules))
	*offload_trigger \|= QCA8K_LED_RX_BLINK_MASK;
	if (test_bit(TRIGGER_NETDEV_LINK_10, &rules))
	*offload_trigger \|= QCA8K_LED_LINK_10M_EN_MASK;
	if (test_bit(TRIGGER_NETDEV_LINK_100, &rules))
	*offload_trigger \|= QCA8K_LED_LINK_100M_EN_MASK;
	if (test_bit(TRIGGER_NETDEV_LINK_1000, &rules))
	*offload_trigger \|= QCA8K_LED_LINK_1000M_EN_MASK;
	if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &rules))
	*offload_trigger \|= QCA8K_LED_HALF_DUPLEX_MASK;
	if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &rules))
	*offload_trigger \|= QCA8K_LED_FULL_DUPLEX_MASK;

	if (rules && !*offload_trigger)
	return -EOPNOTSUPP;

	/* Enable some default rule by default to the requested mode:
	* - Blink at 4Hz by default
	*/
	*offload_trigger \|= QCA8K_LED_BLINK_4HZ;

	return 0;
	}

	static int
	qca8k_led_brightness_set(struct qca8k_led *led,
	enum led_brightness brightness)
	{
	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;
	u32 mask, val;

	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

	val = QCA8K_LED_ALWAYS_OFF;
	if (brightness)
	val = QCA8K_LED_ALWAYS_ON;

	/* HW regs to control brightness is special and port 1-2-3
	* are placed in a different reg.
	*
	* To control port 0 brightness:
	* - the 2 bit (15, 14) of:
	* - QCA8K_LED_CTRL0_REG for led1
	* - QCA8K_LED_CTRL1_REG for led2
	* - QCA8K_LED_CTRL2_REG for led3
	*
	* To control port 4:
	* - the 2 bit (31, 30) of:
	* - QCA8K_LED_CTRL0_REG for led1
	* - QCA8K_LED_CTRL1_REG for led2
	* - QCA8K_LED_CTRL2_REG for led3
	*
	* To control port 1:
	* - the 2 bit at (9, 8) of QCA8K_LED_CTRL3_REG are used for led1
	* - the 2 bit at (11, 10) of QCA8K_LED_CTRL3_REG are used for led2
	* - the 2 bit at (13, 12) of QCA8K_LED_CTRL3_REG are used for led3
	*
	* To control port 2:
	* - the 2 bit at (15, 14) of QCA8K_LED_CTRL3_REG are used for led1
	* - the 2 bit at (17, 16) of QCA8K_LED_CTRL3_REG are used for led2
	* - the 2 bit at (19, 18) of QCA8K_LED_CTRL3_REG are used for led3
	*
	* To control port 3:
	* - the 2 bit at (21, 20) of QCA8K_LED_CTRL3_REG are used for led1
	* - the 2 bit at (23, 22) of QCA8K_LED_CTRL3_REG are used for led2
	* - the 2 bit at (25, 24) of QCA8K_LED_CTRL3_REG are used for led3
	*
	* To abstract this and have less code, we use the port and led numm
	* to calculate the shift and the correct reg due to this problem of
	* not having a 1:1 map of LED with the regs.
	*/
	if (led->port_num == 0 \|\| led->port_num == 4) {
	mask = QCA8K_LED_PATTERN_EN_MASK;
	val <<= QCA8K_LED_PATTERN_EN_SHIFT;
	} else {
	mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
	}

	return regmap_update_bits(priv->regmap, reg_info.reg,
	mask << reg_info.shift,
	val << reg_info.shift);
	}

	static int
	qca8k_cled_brightness_set_blocking(struct led_classdev *ldev,
	enum led_brightness brightness)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);

	return qca8k_led_brightness_set(led, brightness);
	}

	static enum led_brightness
	qca8k_led_brightness_get(struct qca8k_led *led)
	{
	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;
	u32 val;
	int ret;

	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

	ret = regmap_read(priv->regmap, reg_info.reg, &val);
	if (ret)
	return 0;

	val >>= reg_info.shift;

	if (led->port_num == 0 \|\| led->port_num == 4) {
	val &= QCA8K_LED_PATTERN_EN_MASK;
	val >>= QCA8K_LED_PATTERN_EN_SHIFT;
	} else {
	val &= QCA8K_LED_PHY123_PATTERN_EN_MASK;
	}

	/* Assume brightness ON only when the LED is set to always ON */
	return val == QCA8K_LED_ALWAYS_ON;
	}

	static int
	qca8k_cled_blink_set(struct led_classdev *ldev,
	unsigned long *delay_on,
	unsigned long *delay_off)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
	u32 mask, val = QCA8K_LED_ALWAYS_BLINK_4HZ;
	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;

	if (delay_on == 0 && delay_off == 0) {
	*delay_on = 125;
	*delay_off = 125;
	}

	if (delay_on != 125 \|\| delay_off != 125) {
	/* The hardware only supports blinking at 4Hz. Fall back
	* to software implementation in other cases.
	*/
	return -EINVAL;
	}

	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

	if (led->port_num == 0 \|\| led->port_num == 4) {
	mask = QCA8K_LED_PATTERN_EN_MASK;
	val <<= QCA8K_LED_PATTERN_EN_SHIFT;
	} else {
	mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
	}

	regmap_update_bits(priv->regmap, reg_info.reg, mask << reg_info.shift,
	val << reg_info.shift);

	return 0;
	}

	static int
	qca8k_cled_trigger_offload(struct led_classdev *ldev, bool enable)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);

	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;
	u32 mask, val = QCA8K_LED_ALWAYS_OFF;

	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

	if (enable)
	val = QCA8K_LED_RULE_CONTROLLED;

	if (led->port_num == 0 \|\| led->port_num == 4) {
	mask = QCA8K_LED_PATTERN_EN_MASK;
	val <<= QCA8K_LED_PATTERN_EN_SHIFT;
	} else {
	mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
	}

	return regmap_update_bits(priv->regmap, reg_info.reg, mask << reg_info.shift,
	val << reg_info.shift);
	}

	static bool
	qca8k_cled_hw_control_status(struct led_classdev *ldev)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);

	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;
	u32 val;

	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);

	regmap_read(priv->regmap, reg_info.reg, &val);

	val >>= reg_info.shift;

	if (led->port_num == 0 \|\| led->port_num == 4) {
	val &= QCA8K_LED_PATTERN_EN_MASK;
	val >>= QCA8K_LED_PATTERN_EN_SHIFT;
	} else {
	val &= QCA8K_LED_PHY123_PATTERN_EN_MASK;
	}

	return val == QCA8K_LED_RULE_CONTROLLED;
	}

	static int
	qca8k_cled_hw_control_is_supported(struct led_classdev *ldev, unsigned long rules)
	{
	u32 offload_trigger = 0;

	return qca8k_parse_netdev(rules, &offload_trigger);
	}

	static int
	qca8k_cled_hw_control_set(struct led_classdev *ldev, unsigned long rules)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;
	u32 offload_trigger = 0;
	int ret;

	ret = qca8k_parse_netdev(rules, &offload_trigger);
	if (ret)
	return ret;

	ret = qca8k_cled_trigger_offload(ldev, true);
	if (ret)
	return ret;

	qca8k_get_control_led_reg(led->port_num, led->led_num, &reg_info);

	return regmap_update_bits(priv->regmap, reg_info.reg,
	QCA8K_LED_RULE_MASK << reg_info.shift,
	offload_trigger << reg_info.shift);
	}

	static int
	qca8k_cled_hw_control_get(struct led_classdev ldev, unsigned long rules)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
	struct qca8k_led_pattern_en reg_info;
	struct qca8k_priv *priv = led->priv;
	u32 val;
	int ret;

	/* With hw control not active return err */
	if (!qca8k_cled_hw_control_status(ldev))
	return -EINVAL;

	qca8k_get_control_led_reg(led->port_num, led->led_num, &reg_info);

	ret = regmap_read(priv->regmap, reg_info.reg, &val);
	if (ret)
	return ret;

	val >>= reg_info.shift;
	val &= QCA8K_LED_RULE_MASK;

	/* Parsing specific to netdev trigger */
	if (val & QCA8K_LED_TX_BLINK_MASK)
	set_bit(TRIGGER_NETDEV_TX, rules);
	if (val & QCA8K_LED_RX_BLINK_MASK)
	set_bit(TRIGGER_NETDEV_RX, rules);
	if (val & QCA8K_LED_LINK_10M_EN_MASK)
	set_bit(TRIGGER_NETDEV_LINK_10, rules);
	if (val & QCA8K_LED_LINK_100M_EN_MASK)
	set_bit(TRIGGER_NETDEV_LINK_100, rules);
	if (val & QCA8K_LED_LINK_1000M_EN_MASK)
	set_bit(TRIGGER_NETDEV_LINK_1000, rules);
	if (val & QCA8K_LED_HALF_DUPLEX_MASK)
	set_bit(TRIGGER_NETDEV_HALF_DUPLEX, rules);
	if (val & QCA8K_LED_FULL_DUPLEX_MASK)
	set_bit(TRIGGER_NETDEV_FULL_DUPLEX, rules);

	return 0;
	}

	static struct device qca8k_cled_hw_control_get_device(struct led_classdev ldev)
	{
	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
	struct qca8k_priv *priv = led->priv;
	struct dsa_port *dp;

	dp = dsa_to_port(priv->ds, qca8k_phy_to_port(led->port_num));
	if (!dp)
	return NULL;
	if (dp->user)
	return &dp->user->dev;
	return NULL;
	}

	static int
	qca8k_parse_port_leds(struct qca8k_priv priv, struct fwnode_handle port, int port_num)
	{
	struct fwnode_handle led = NULL, leds = NULL;
	struct led_init_data init_data = { };
	enum led_default_state state;
	struct qca8k_led *port_led;
	int led_num, led_index;
	int ret;

	leds = fwnode_get_named_child_node(port, "leds");
	if (!leds) {
	dev_dbg(priv->dev, "No Leds node specified in device tree for port %d!\n",
	port_num);
	return 0;
	}

	fwnode_for_each_child_node(leds, led) {
	/* Reg represent the led number of the port.
	* Each port can have at most 3 leds attached
	* Commonly:
	* 1. is gigabit led
	* 2. is mbit led
	* 3. additional status led
	*/
	if (fwnode_property_read_u32(led, "reg", &led_num))
	continue;

	if (led_num >= QCA8K_LED_PORT_COUNT) {
	dev_warn(priv->dev, "Invalid LED reg %d defined for port %d",
	led_num, port_num);
	continue;
	}

	led_index = QCA8K_LED_PORT_INDEX(port_num, led_num);

	port_led = &priv->ports_led[led_index];
	port_led->port_num = port_num;
	port_led->led_num = led_num;
	port_led->priv = priv;

	state = led_init_default_state_get(led);
	switch (state) {
	case LEDS_DEFSTATE_ON:
	port_led->cdev.brightness = 1;
	qca8k_led_brightness_set(port_led, 1);
	break;
	case LEDS_DEFSTATE_KEEP:
	port_led->cdev.brightness =
	qca8k_led_brightness_get(port_led);
	break;
	default:
	port_led->cdev.brightness = 0;
	qca8k_led_brightness_set(port_led, 0);
	}

	port_led->cdev.max_brightness = 1;
	port_led->cdev.brightness_set_blocking = qca8k_cled_brightness_set_blocking;
	port_led->cdev.blink_set = qca8k_cled_blink_set;
	port_led->cdev.hw_control_is_supported = qca8k_cled_hw_control_is_supported;
	port_led->cdev.hw_control_set = qca8k_cled_hw_control_set;
	port_led->cdev.hw_control_get = qca8k_cled_hw_control_get;
	port_led->cdev.hw_control_get_device = qca8k_cled_hw_control_get_device;
	port_led->cdev.hw_control_trigger = "netdev";
	init_data.default_label = ":port";
	init_data.fwnode = led;
	init_data.devname_mandatory = true;
	init_data.devicename = kasprintf(GFP_KERNEL, "%s:0%d",
	priv->internal_mdio_bus->id,
	port_num);
	if (!init_data.devicename)
	return -ENOMEM;

	ret = devm_led_classdev_register_ext(priv->dev, &port_led->cdev, &init_data);
	if (ret)
	dev_warn(priv->dev, "Failed to init LED %d for port %d", led_num, port_num);

	kfree(init_data.devicename);
	}

	return 0;
	}

	int
	qca8k_setup_led_ctrl(struct qca8k_priv *priv)
	{
	struct fwnode_handle ports, port;
	int port_num;
	int ret;

	ports = device_get_named_child_node(priv->dev, "ports");
	if (!ports) {
	dev_info(priv->dev, "No ports node specified in device tree!");
	return 0;
	}

	fwnode_for_each_child_node(ports, port) {
	if (fwnode_property_read_u32(port, "reg", &port_num))
	continue;

	/* Skip checking for CPU port 0 and CPU port 6 as not supported */
	if (port_num == 0 \|\| port_num == 6)
	continue;

	/* Each port can have at most 3 different leds attached.
	* Switch port starts from 0 to 6, but port 0 and 6 are CPU
	* port. The port index needs to be decreased by one to identify
	* the correct port for LED setup.
	*/
	ret = qca8k_parse_port_leds(priv, port, qca8k_port_to_phy(port_num));
	if (ret)
	return ret;
	}

	return 0;
	}