drivers/leds/leds-ns2.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * leds-ns2.c - Driver for the Network Space v2 (and parents) dual-GPIO LED
  *
  * Copyright (C) 2010 LaCie
  *
  * Author: Simon Guinot <sguinot@lacie.com>
  *
  * Based on leds-gpio.c by Raphael Assenat <raph@8d.com>
  */

 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
 #include <linux/leds.h>
 #include <linux/module.h>
 #include <linux/platform_data/leds-kirkwood-ns2.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include "leds.h"

 /*
  * The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
  * modes are available: off, on and SATA activity blinking. The LED modes are
  * controlled through two GPIOs (command and slow): each combination of values
  * for the command/slow GPIOs corresponds to a LED mode.
  */

 struct ns2_led_data {
 	struct led_classdev	cdev;
 	unsigned int		cmd;
 	unsigned int		slow;
 	bool			can_sleep;
 	unsigned char		sata; /* True when SATA mode active. */
 	rwlock_t		rw_lock; /* Lock GPIOs. */
 	int			num_modes;
 	struct ns2_led_modval	*modval;
 };

 static int ns2_led_get_mode(struct ns2_led_data *led_dat,
 			    enum ns2_led_modes *mode)
 {
 	int i;
 	int ret = -EINVAL;
 	int cmd_level;
 	int slow_level;

 	cmd_level = gpio_get_value_cansleep(led_dat->cmd);
 	slow_level = gpio_get_value_cansleep(led_dat->slow);

 	for (i = 0; i < led_dat->num_modes; i++) {
 		if (cmd_level == led_dat->modval[i].cmd_level &&
 		    slow_level == led_dat->modval[i].slow_level) {
 			*mode = led_dat->modval[i].mode;
 			ret = 0;
 			break;
 		}
 	}

 	return ret;
 }

 static void ns2_led_set_mode(struct ns2_led_data *led_dat,
 			     enum ns2_led_modes mode)
 {
 	int i;
 	bool found = false;
 	unsigned long flags;

 	for (i = 0; i < led_dat->num_modes; i++)
 		if (mode == led_dat->modval[i].mode) {
 			found = true;
 			break;
 		}

 	if (!found)
 		return;

 	write_lock_irqsave(&led_dat->rw_lock, flags);

 	if (!led_dat->can_sleep) {
 		gpio_set_value(led_dat->cmd,
 			       led_dat->modval[i].cmd_level);
 		gpio_set_value(led_dat->slow,
 			       led_dat->modval[i].slow_level);
 		goto exit_unlock;
 	}

 	gpio_set_value_cansleep(led_dat->cmd, led_dat->modval[i].cmd_level);
 	gpio_set_value_cansleep(led_dat->slow, led_dat->modval[i].slow_level);

 exit_unlock:
 	write_unlock_irqrestore(&led_dat->rw_lock, flags);
 }

 static void ns2_led_set(struct led_classdev *led_cdev,
 			enum led_brightness value)
 {
 	struct ns2_led_data *led_dat =
 		container_of(led_cdev, struct ns2_led_data, cdev);
 	enum ns2_led_modes mode;

 	if (value == LED_OFF)
 		mode = NS_V2_LED_OFF;
 	else if (led_dat->sata)
 		mode = NS_V2_LED_SATA;
 	else
 		mode = NS_V2_LED_ON;

 	ns2_led_set_mode(led_dat, mode);
 }

 static int ns2_led_set_blocking(struct led_classdev *led_cdev,
 			enum led_brightness value)
 {
 	ns2_led_set(led_cdev, value);
 	return 0;
 }

 static ssize_t ns2_led_sata_store(struct device *dev,
 				  struct device_attribute *attr,
 				  const char *buff, size_t count)
 {
 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct ns2_led_data *led_dat =
 		container_of(led_cdev, struct ns2_led_data, cdev);
 	int ret;
 	unsigned long enable;

 	ret = kstrtoul(buff, 10, &enable);
 	if (ret < 0)
 		return ret;

 	enable = !!enable;

 	if (led_dat->sata == enable)
 		goto exit;

 	led_dat->sata = enable;

 	if (!led_get_brightness(led_cdev))
 		goto exit;

 	if (enable)
 		ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
 	else
 		ns2_led_set_mode(led_dat, NS_V2_LED_ON);

 exit:
 	return count;
 }

 static ssize_t ns2_led_sata_show(struct device *dev,
 				 struct device_attribute *attr, char *buf)
 {
 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct ns2_led_data *led_dat =
 		container_of(led_cdev, struct ns2_led_data, cdev);

 	return sprintf(buf, "%d\n", led_dat->sata);
 }

 static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);

 static struct attribute *ns2_led_attrs[] = {
 	&dev_attr_sata.attr,
 	NULL
 };
 ATTRIBUTE_GROUPS(ns2_led);

 static int
 create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat,
 	       const struct ns2_led *template)
 {
 	int ret;
 	enum ns2_led_modes mode;

 	ret = devm_gpio_request_one(&pdev->dev, template->cmd,
 			gpio_get_value_cansleep(template->cmd) ?
 			GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 			template->name);
 	if (ret) {
 		dev_err(&pdev->dev, "%s: failed to setup command GPIO\n",
 			template->name);
 		return ret;
 	}

 	ret = devm_gpio_request_one(&pdev->dev, template->slow,
 			gpio_get_value_cansleep(template->slow) ?
 			GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 			template->name);
 	if (ret) {
 		dev_err(&pdev->dev, "%s: failed to setup slow GPIO\n",
 			template->name);
 		return ret;
 	}

 	rwlock_init(&led_dat->rw_lock);

 	led_dat->cdev.name = template->name;
 	led_dat->cdev.default_trigger = template->default_trigger;
 	led_dat->cdev.blink_set = NULL;
 	led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
 	led_dat->cdev.groups = ns2_led_groups;
 	led_dat->cmd = template->cmd;
 	led_dat->slow = template->slow;
 	led_dat->can_sleep = gpio_cansleep(led_dat->cmd) |
 				gpio_cansleep(led_dat->slow);
 	if (led_dat->can_sleep)
 		led_dat->cdev.brightness_set_blocking = ns2_led_set_blocking;
 	else
 		led_dat->cdev.brightness_set = ns2_led_set;
 	led_dat->modval = template->modval;
 	led_dat->num_modes = template->num_modes;

 	ret = ns2_led_get_mode(led_dat, &mode);
 	if (ret < 0)
 		return ret;

 	/* Set LED initial state. */
 	led_dat->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
 	led_dat->cdev.brightness =
 		(mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;

 	ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static void delete_ns2_led(struct ns2_led_data *led_dat)
 {
 	led_classdev_unregister(&led_dat->cdev);
 }

 #ifdef CONFIG_OF_GPIO
 /*
  * Translate OpenFirmware node properties into platform_data.
  */
 static int
 ns2_leds_get_of_pdata(struct device *dev, struct ns2_led_platform_data *pdata)
 {
 	struct device_node *np = dev->of_node;
 	struct device_node *child;
 	struct ns2_led *led, *leds;
 	int ret, num_leds = 0;

 	num_leds = of_get_child_count(np);
 	if (!num_leds)
 		return -ENODEV;

 	leds = devm_kcalloc(dev, num_leds, sizeof(struct ns2_led),
 			    GFP_KERNEL);
 	if (!leds)
 		return -ENOMEM;

 	led = leds;
 	for_each_child_of_node(np, child) {
 		const char *string;
 		int i, num_modes;
 		struct ns2_led_modval *modval;

 		ret = of_get_named_gpio(child, "cmd-gpio", 0);
 		if (ret < 0)
 			goto err_node_put;
 		led->cmd = ret;
 		ret = of_get_named_gpio(child, "slow-gpio", 0);
 		if (ret < 0)
 			goto err_node_put;
 		led->slow = ret;
 		ret = of_property_read_string(child, "label", &string);
 		led->name = (ret == 0) ? string : child->name;
 		ret = of_property_read_string(child, "linux,default-trigger",
 					      &string);
 		if (ret == 0)
 			led->default_trigger = string;

 		ret = of_property_count_u32_elems(child, "modes-map");
 		if (ret < 0 || ret % 3) {
 			dev_err(dev,
 				"Missing or malformed modes-map property\n");
 			ret = -EINVAL;
 			goto err_node_put;
 		}

 		num_modes = ret / 3;
 		modval = devm_kcalloc(dev,
 				      num_modes,
 				      sizeof(struct ns2_led_modval),
 				      GFP_KERNEL);
 		if (!modval) {
 			ret = -ENOMEM;
 			goto err_node_put;
 		}

 		for (i = 0; i < num_modes; i++) {
 			of_property_read_u32_index(child,
 						"modes-map", 3 * i,
 						(u32 *) &modval[i].mode);
 			of_property_read_u32_index(child,
 						"modes-map", 3 * i + 1,
 						(u32 *) &modval[i].cmd_level);
 			of_property_read_u32_index(child,
 						"modes-map", 3 * i + 2,
 						(u32 *) &modval[i].slow_level);
 		}

 		led->num_modes = num_modes;
 		led->modval = modval;

 		led++;
 	}

 	pdata->leds = leds;
 	pdata->num_leds = num_leds;

 	return 0;

 err_node_put:
 	of_node_put(child);
 	return ret;
 }

 static const struct of_device_id of_ns2_leds_match[] = {
 	{ .compatible = "lacie,ns2-leds", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, of_ns2_leds_match);
 #endif /* CONFIG_OF_GPIO */

 struct ns2_led_priv {
 	int num_leds;
 	struct ns2_led_data leds_data[];
 };

 static inline int sizeof_ns2_led_priv(int num_leds)
 {
 	return sizeof(struct ns2_led_priv) +
 		      (sizeof(struct ns2_led_data) * num_leds);
 }

 static int ns2_led_probe(struct platform_device *pdev)
 {
 	struct ns2_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct ns2_led_priv *priv;
 	int i;
 	int ret;

 #ifdef CONFIG_OF_GPIO
 	if (!pdata) {
 		pdata = devm_kzalloc(&pdev->dev,
 				     sizeof(struct ns2_led_platform_data),
 				     GFP_KERNEL);
 		if (!pdata)
 			return -ENOMEM;

 		ret = ns2_leds_get_of_pdata(&pdev->dev, pdata);
 		if (ret)
 			return ret;
 	}
 #else
 	if (!pdata)
 		return -EINVAL;
 #endif /* CONFIG_OF_GPIO */

 	priv = devm_kzalloc(&pdev->dev,
 			    sizeof_ns2_led_priv(pdata->num_leds), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 	priv->num_leds = pdata->num_leds;

 	for (i = 0; i < priv->num_leds; i++) {
 		ret = create_ns2_led(pdev, &priv->leds_data[i],
 				     &pdata->leds[i]);
 		if (ret < 0) {
 			for (i = i - 1; i >= 0; i--)
 				delete_ns2_led(&priv->leds_data[i]);
 			return ret;
 		}
 	}

 	platform_set_drvdata(pdev, priv);

 	return 0;
 }

 static int ns2_led_remove(struct platform_device *pdev)
 {
 	int i;
 	struct ns2_led_priv *priv;

 	priv = platform_get_drvdata(pdev);

 	for (i = 0; i < priv->num_leds; i++)
 		delete_ns2_led(&priv->leds_data[i]);

 	return 0;
 }

 static struct platform_driver ns2_led_driver = {
 	.probe		= ns2_led_probe,
 	.remove		= ns2_led_remove,
 	.driver		= {
 		.name		= "leds-ns2",
 		.of_match_table	= of_match_ptr(of_ns2_leds_match),
 	},
 };

 module_platform_driver(ns2_led_driver);

 MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
 MODULE_DESCRIPTION("Network Space v2 LED driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:leds-ns2");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* leds-ns2.c - Driver for the Network Space v2 (and parents) dual-GPIO LED
	*
	* Copyright (C) 2010 LaCie
	*
	* Author: Simon Guinot <sguinot@lacie.com>
	*
	* Based on leds-gpio.c by Raphael Assenat <raph@8d.com>
	*/

	#include <linux/kernel.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/gpio.h>
	#include <linux/leds.h>
	#include <linux/module.h>
	#include <linux/platform_data/leds-kirkwood-ns2.h>
	#include <linux/of.h>
	#include <linux/of_gpio.h>
	#include "leds.h"

	/*
	* The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
	* modes are available: off, on and SATA activity blinking. The LED modes are
	* controlled through two GPIOs (command and slow): each combination of values
	* for the command/slow GPIOs corresponds to a LED mode.
	*/

	struct ns2_led_data {
	struct led_classdev cdev;
	unsigned int cmd;
	unsigned int slow;
	bool can_sleep;
	unsigned char sata; /* True when SATA mode active. */
	rwlock_t rw_lock; /* Lock GPIOs. */
	int num_modes;
	struct ns2_led_modval *modval;
	};

	static int ns2_led_get_mode(struct ns2_led_data *led_dat,
	enum ns2_led_modes *mode)
	{
	int i;
	int ret = -EINVAL;
	int cmd_level;
	int slow_level;

	cmd_level = gpio_get_value_cansleep(led_dat->cmd);
	slow_level = gpio_get_value_cansleep(led_dat->slow);

	for (i = 0; i < led_dat->num_modes; i++) {
	if (cmd_level == led_dat->modval[i].cmd_level &&
	slow_level == led_dat->modval[i].slow_level) {
	*mode = led_dat->modval[i].mode;
	ret = 0;
	break;
	}
	}

	return ret;
	}

	static void ns2_led_set_mode(struct ns2_led_data *led_dat,
	enum ns2_led_modes mode)
	{
	int i;
	bool found = false;
	unsigned long flags;

	for (i = 0; i < led_dat->num_modes; i++)
	if (mode == led_dat->modval[i].mode) {
	found = true;
	break;
	}

	if (!found)
	return;

	write_lock_irqsave(&led_dat->rw_lock, flags);

	if (!led_dat->can_sleep) {
	gpio_set_value(led_dat->cmd,
	led_dat->modval[i].cmd_level);
	gpio_set_value(led_dat->slow,
	led_dat->modval[i].slow_level);
	goto exit_unlock;
	}

	gpio_set_value_cansleep(led_dat->cmd, led_dat->modval[i].cmd_level);
	gpio_set_value_cansleep(led_dat->slow, led_dat->modval[i].slow_level);

	exit_unlock:
	write_unlock_irqrestore(&led_dat->rw_lock, flags);
	}

	static void ns2_led_set(struct led_classdev *led_cdev,
	enum led_brightness value)
	{
	struct ns2_led_data *led_dat =
	container_of(led_cdev, struct ns2_led_data, cdev);
	enum ns2_led_modes mode;

	if (value == LED_OFF)
	mode = NS_V2_LED_OFF;
	else if (led_dat->sata)
	mode = NS_V2_LED_SATA;
	else
	mode = NS_V2_LED_ON;

	ns2_led_set_mode(led_dat, mode);
	}

	static int ns2_led_set_blocking(struct led_classdev *led_cdev,
	enum led_brightness value)
	{
	ns2_led_set(led_cdev, value);
	return 0;
	}

	static ssize_t ns2_led_sata_store(struct device *dev,
	struct device_attribute *attr,
	const char *buff, size_t count)
	{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct ns2_led_data *led_dat =
	container_of(led_cdev, struct ns2_led_data, cdev);
	int ret;
	unsigned long enable;

	ret = kstrtoul(buff, 10, &enable);
	if (ret < 0)
	return ret;

	enable = !!enable;

	if (led_dat->sata == enable)
	goto exit;

	led_dat->sata = enable;

	if (!led_get_brightness(led_cdev))
	goto exit;

	if (enable)
	ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
	else
	ns2_led_set_mode(led_dat, NS_V2_LED_ON);

	exit:
	return count;
	}

	static ssize_t ns2_led_sata_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct ns2_led_data *led_dat =
	container_of(led_cdev, struct ns2_led_data, cdev);

	return sprintf(buf, "%d\n", led_dat->sata);
	}

	static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);

	static struct attribute *ns2_led_attrs[] = {
	&dev_attr_sata.attr,
	NULL
	};
	ATTRIBUTE_GROUPS(ns2_led);

	static int
	create_ns2_led(struct platform_device pdev, struct ns2_led_data led_dat,
	const struct ns2_led *template)
	{
	int ret;
	enum ns2_led_modes mode;

	ret = devm_gpio_request_one(&pdev->dev, template->cmd,
	gpio_get_value_cansleep(template->cmd) ?
	GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
	template->name);
	if (ret) {
	dev_err(&pdev->dev, "%s: failed to setup command GPIO\n",
	template->name);
	return ret;
	}

	ret = devm_gpio_request_one(&pdev->dev, template->slow,
	gpio_get_value_cansleep(template->slow) ?
	GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
	template->name);
	if (ret) {
	dev_err(&pdev->dev, "%s: failed to setup slow GPIO\n",
	template->name);
	return ret;
	}

	rwlock_init(&led_dat->rw_lock);

	led_dat->cdev.name = template->name;
	led_dat->cdev.default_trigger = template->default_trigger;
	led_dat->cdev.blink_set = NULL;
	led_dat->cdev.flags \|= LED_CORE_SUSPENDRESUME;
	led_dat->cdev.groups = ns2_led_groups;
	led_dat->cmd = template->cmd;
	led_dat->slow = template->slow;
	led_dat->can_sleep = gpio_cansleep(led_dat->cmd) \|
	gpio_cansleep(led_dat->slow);
	if (led_dat->can_sleep)
	led_dat->cdev.brightness_set_blocking = ns2_led_set_blocking;
	else
	led_dat->cdev.brightness_set = ns2_led_set;
	led_dat->modval = template->modval;
	led_dat->num_modes = template->num_modes;

	ret = ns2_led_get_mode(led_dat, &mode);
	if (ret < 0)
	return ret;

	/* Set LED initial state. */
	led_dat->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
	led_dat->cdev.brightness =
	(mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;

	ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
	if (ret < 0)
	return ret;

	return 0;
	}

	static void delete_ns2_led(struct ns2_led_data *led_dat)
	{
	led_classdev_unregister(&led_dat->cdev);
	}

	#ifdef CONFIG_OF_GPIO
	/*
	* Translate OpenFirmware node properties into platform_data.
	*/
	static int
	ns2_leds_get_of_pdata(struct device dev, struct ns2_led_platform_data pdata)
	{
	struct device_node *np = dev->of_node;
	struct device_node *child;
	struct ns2_led led, leds;
	int ret, num_leds = 0;

	num_leds = of_get_child_count(np);
	if (!num_leds)
	return -ENODEV;

	leds = devm_kcalloc(dev, num_leds, sizeof(struct ns2_led),
	GFP_KERNEL);
	if (!leds)
	return -ENOMEM;

	led = leds;
	for_each_child_of_node(np, child) {
	const char *string;
	int i, num_modes;
	struct ns2_led_modval *modval;

	ret = of_get_named_gpio(child, "cmd-gpio", 0);
	if (ret < 0)
	goto err_node_put;
	led->cmd = ret;
	ret = of_get_named_gpio(child, "slow-gpio", 0);
	if (ret < 0)
	goto err_node_put;
	led->slow = ret;
	ret = of_property_read_string(child, "label", &string);
	led->name = (ret == 0) ? string : child->name;
	ret = of_property_read_string(child, "linux,default-trigger",
	&string);
	if (ret == 0)
	led->default_trigger = string;

	ret = of_property_count_u32_elems(child, "modes-map");
	if (ret < 0 \|\| ret % 3) {
	dev_err(dev,
	"Missing or malformed modes-map property\n");
	ret = -EINVAL;
	goto err_node_put;
	}

	num_modes = ret / 3;
	modval = devm_kcalloc(dev,
	num_modes,
	sizeof(struct ns2_led_modval),
	GFP_KERNEL);
	if (!modval) {
	ret = -ENOMEM;
	goto err_node_put;
	}

	for (i = 0; i < num_modes; i++) {
	of_property_read_u32_index(child,
	"modes-map", 3 * i,
	(u32 *) &modval[i].mode);
	of_property_read_u32_index(child,
	"modes-map", 3 * i + 1,
	(u32 *) &modval[i].cmd_level);
	of_property_read_u32_index(child,
	"modes-map", 3 * i + 2,
	(u32 *) &modval[i].slow_level);
	}

	led->num_modes = num_modes;
	led->modval = modval;

	led++;
	}

	pdata->leds = leds;
	pdata->num_leds = num_leds;

	return 0;

	err_node_put:
	of_node_put(child);
	return ret;
	}

	static const struct of_device_id of_ns2_leds_match[] = {
	{ .compatible = "lacie,ns2-leds", },
	{},
	};
	MODULE_DEVICE_TABLE(of, of_ns2_leds_match);
	#endif /* CONFIG_OF_GPIO */

	struct ns2_led_priv {
	int num_leds;
	struct ns2_led_data leds_data[];
	};

	static inline int sizeof_ns2_led_priv(int num_leds)
	{
	return sizeof(struct ns2_led_priv) +
	(sizeof(struct ns2_led_data) * num_leds);
	}

	static int ns2_led_probe(struct platform_device *pdev)
	{
	struct ns2_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct ns2_led_priv *priv;
	int i;
	int ret;

	#ifdef CONFIG_OF_GPIO
	if (!pdata) {
	pdata = devm_kzalloc(&pdev->dev,
	sizeof(struct ns2_led_platform_data),
	GFP_KERNEL);
	if (!pdata)
	return -ENOMEM;

	ret = ns2_leds_get_of_pdata(&pdev->dev, pdata);
	if (ret)
	return ret;
	}
	#else
	if (!pdata)
	return -EINVAL;
	#endif /* CONFIG_OF_GPIO */

	priv = devm_kzalloc(&pdev->dev,
	sizeof_ns2_led_priv(pdata->num_leds), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;
	priv->num_leds = pdata->num_leds;

	for (i = 0; i < priv->num_leds; i++) {
	ret = create_ns2_led(pdev, &priv->leds_data[i],
	&pdata->leds[i]);
	if (ret < 0) {
	for (i = i - 1; i >= 0; i--)
	delete_ns2_led(&priv->leds_data[i]);
	return ret;
	}
	}

	platform_set_drvdata(pdev, priv);

	return 0;
	}

	static int ns2_led_remove(struct platform_device *pdev)
	{
	int i;
	struct ns2_led_priv *priv;

	priv = platform_get_drvdata(pdev);

	for (i = 0; i < priv->num_leds; i++)
	delete_ns2_led(&priv->leds_data[i]);

	return 0;
	}

	static struct platform_driver ns2_led_driver = {
	.probe = ns2_led_probe,
	.remove = ns2_led_remove,
	.driver = {
	.name = "leds-ns2",
	.of_match_table = of_match_ptr(of_ns2_leds_match),
	},
	};

	module_platform_driver(ns2_led_driver);

	MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
	MODULE_DESCRIPTION("Network Space v2 LED driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:leds-ns2");