[linux-2.6-block.git] / drivers / leds / leds-ns2.c

/*
 * 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>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#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		cmd;
	unsigned		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 num_leds = 0;

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

	leds = devm_kzalloc(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 ret, i, num_modes;
		struct ns2_led_modval *modval;

		ret = of_get_named_gpio(child, "cmd-gpio", 0);
		if (ret < 0)
			return ret;
		led->cmd = ret;
		ret = of_get_named_gpio(child, "slow-gpio", 0);
		if (ret < 0)
			return ret;
		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");
			return -EINVAL;
		}

		num_modes = ret / 3;
		modval = devm_kzalloc(dev,
				      num_modes * sizeof(struct ns2_led_modval),
				      GFP_KERNEL);
		if (!modval)
			return -ENOMEM;

		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;
}

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");
Commit	Line	Data
11efe71f SG	1	/*
	2	* leds-ns2.c - Driver for the Network Space v2 (and parents) dual-GPIO LED
	3	*
	4	* Copyright (C) 2010 LaCie
	5	*
	6	* Author: Simon Guinot <sguinot@lacie.com>
	7	*
	8	* Based on leds-gpio.c by Raphael Assenat <raph@8d.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*/
	24
	25	#include <linux/kernel.h>
11efe71f SG	26	#include <linux/platform_device.h>
	27	#include <linux/slab.h>
	28	#include <linux/gpio.h>
	29	#include <linux/leds.h>
54f4dedb	30	#include <linux/module.h>
c02cecb9	31	#include <linux/platform_data/leds-kirkwood-ns2.h>
c68f46dd	32	#include <linux/of.h>
72052fcc	33	#include <linux/of_gpio.h>
4b90432d	34	#include "leds.h"
11efe71f SG	35
11efe71f SG	36	/*
f7fafd08 VD	37	* The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
	38	* modes are available: off, on and SATA activity blinking. The LED modes are
	39	* controlled through two GPIOs (command and slow): each combination of values
	40	* for the command/slow GPIOs corresponds to a LED mode.
11efe71f SG	41	*/
11efe71f SG	42
11efe71f SG	43	struct ns2_led_data {
	44	struct led_classdev cdev;
	45	unsigned cmd;
	46	unsigned slow;
4b90432d	47	bool can_sleep;
11efe71f SG	48	unsigned char sata; /* True when SATA mode active. */
11efe71f SG	49	rwlock_t rw_lock; /* Lock GPIOs. */
f7fafd08 VD	50	int num_modes;
f7fafd08 VD	51	struct ns2_led_modval *modval;
11efe71f SG	52	};
	53
	54	static int ns2_led_get_mode(struct ns2_led_data *led_dat,
	55	enum ns2_led_modes *mode)
	56	{
	57	int i;
	58	int ret = -EINVAL;
	59	int cmd_level;
	60	int slow_level;
	61
4b90432d SG	62	cmd_level = gpio_get_value_cansleep(led_dat->cmd);
4b90432d SG	63	slow_level = gpio_get_value_cansleep(led_dat->slow);
11efe71f	64
f7fafd08 VD	65	for (i = 0; i < led_dat->num_modes; i++) {
	66	if (cmd_level == led_dat->modval[i].cmd_level &&
	67	slow_level == led_dat->modval[i].slow_level) {
	68	*mode = led_dat->modval[i].mode;
11efe71f SG	69	ret = 0;
	70	break;
	71	}
	72	}
	73
11efe71f SG	74	return ret;
	75	}
	76
	77	static void ns2_led_set_mode(struct ns2_led_data *led_dat,
	78	enum ns2_led_modes mode)
	79	{
	80	int i;
4b90432d	81	bool found = false;
f539dfed	82	unsigned long flags;
11efe71f	83
4b90432d	84	for (i = 0; i < led_dat->num_modes; i++)
f7fafd08	85	if (mode == led_dat->modval[i].mode) {
4b90432d SG	86	found = true;
4b90432d SG	87	break;
11efe71f	88	}
4b90432d SG	89
	90	if (!found)
	91	return;
	92
	93	write_lock_irqsave(&led_dat->rw_lock, flags);
	94
	95	if (!led_dat->can_sleep) {
	96	gpio_set_value(led_dat->cmd,
	97	led_dat->modval[i].cmd_level);
	98	gpio_set_value(led_dat->slow,
	99	led_dat->modval[i].slow_level);
	100	goto exit_unlock;
11efe71f SG	101	}
11efe71f SG	102
c29e650b JA	103	gpio_set_value_cansleep(led_dat->cmd, led_dat->modval[i].cmd_level);
c29e650b JA	104	gpio_set_value_cansleep(led_dat->slow, led_dat->modval[i].slow_level);
4b90432d SG	105
4b90432d SG	106	exit_unlock:
f539dfed	107	write_unlock_irqrestore(&led_dat->rw_lock, flags);
11efe71f SG	108	}
	109
	110	static void ns2_led_set(struct led_classdev *led_cdev,
	111	enum led_brightness value)
	112	{
	113	struct ns2_led_data *led_dat =
	114	container_of(led_cdev, struct ns2_led_data, cdev);
	115	enum ns2_led_modes mode;
	116
	117	if (value == LED_OFF)
	118	mode = NS_V2_LED_OFF;
	119	else if (led_dat->sata)
	120	mode = NS_V2_LED_SATA;
	121	else
	122	mode = NS_V2_LED_ON;
	123
	124	ns2_led_set_mode(led_dat, mode);
	125	}
	126
c29e650b JA	127	static int ns2_led_set_blocking(struct led_classdev *led_cdev,
	128	enum led_brightness value)
	129	{
	130	ns2_led_set(led_cdev, value);
	131	return 0;
	132	}
	133
11efe71f SG	134	static ssize_t ns2_led_sata_store(struct device *dev,
	135	struct device_attribute *attr,
	136	const char *buff, size_t count)
	137	{
e5971bbc SG	138	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	139	struct ns2_led_data *led_dat =
	140	container_of(led_cdev, struct ns2_led_data, cdev);
11efe71f SG	141	int ret;
11efe71f SG	142	unsigned long enable;
11efe71f	143
3874350c	144	ret = kstrtoul(buff, 10, &enable);
11efe71f SG	145	if (ret < 0)
	146	return ret;
	147
	148	enable = !!enable;
	149
	150	if (led_dat->sata == enable)
4b90432d	151	goto exit;
11efe71f	152
4b90432d SG	153	led_dat->sata = enable;
	154
	155	if (!led_get_brightness(led_cdev))
	156	goto exit;
11efe71f	157
4b90432d	158	if (enable)
11efe71f	159	ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
4b90432d	160	else
11efe71f SG	161	ns2_led_set_mode(led_dat, NS_V2_LED_ON);
11efe71f SG	162
4b90432d	163	exit:
11efe71f SG	164	return count;
	165	}
	166
	167	static ssize_t ns2_led_sata_show(struct device *dev,
	168	struct device_attribute attr, char buf)
	169	{
e5971bbc SG	170	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	171	struct ns2_led_data *led_dat =
	172	container_of(led_cdev, struct ns2_led_data, cdev);
11efe71f SG	173
	174	return sprintf(buf, "%d\n", led_dat->sata);
	175	}
	176
	177	static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);
	178
475f8548 JH	179	static struct attribute *ns2_led_attrs[] = {
	180	&dev_attr_sata.attr,
	181	NULL
	182	};
	183	ATTRIBUTE_GROUPS(ns2_led);
	184
98ea1ea2	185	static int
11efe71f SG	186	create_ns2_led(struct platform_device pdev, struct ns2_led_data led_dat,
	187	const struct ns2_led *template)
	188	{
	189	int ret;
	190	enum ns2_led_modes mode;
	191
04195823	192	ret = devm_gpio_request_one(&pdev->dev, template->cmd,
4b90432d	193	gpio_get_value_cansleep(template->cmd) ?
9d04cbaa	194	GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
31c3dc74	195	template->name);
11efe71f SG	196	if (ret) {
	197	dev_err(&pdev->dev, "%s: failed to setup command GPIO\n",
	198	template->name);
31c3dc74	199	return ret;
11efe71f SG	200	}
11efe71f SG	201
04195823	202	ret = devm_gpio_request_one(&pdev->dev, template->slow,
4b90432d	203	gpio_get_value_cansleep(template->slow) ?
9d04cbaa	204	GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
31c3dc74	205	template->name);
11efe71f SG	206	if (ret) {
	207	dev_err(&pdev->dev, "%s: failed to setup slow GPIO\n",
	208	template->name);
04195823	209	return ret;
11efe71f SG	210	}
	211
	212	rwlock_init(&led_dat->rw_lock);
	213
	214	led_dat->cdev.name = template->name;
	215	led_dat->cdev.default_trigger = template->default_trigger;
	216	led_dat->cdev.blink_set = NULL;
11efe71f	217	led_dat->cdev.flags \|= LED_CORE_SUSPENDRESUME;
475f8548	218	led_dat->cdev.groups = ns2_led_groups;
11efe71f SG	219	led_dat->cmd = template->cmd;
11efe71f SG	220	led_dat->slow = template->slow;
4b90432d SG	221	led_dat->can_sleep = gpio_cansleep(led_dat->cmd) \|
4b90432d SG	222	gpio_cansleep(led_dat->slow);
c29e650b JA	223	if (led_dat->can_sleep)
	224	led_dat->cdev.brightness_set_blocking = ns2_led_set_blocking;
	225	else
	226	led_dat->cdev.brightness_set = ns2_led_set;
f7fafd08 VD	227	led_dat->modval = template->modval;
f7fafd08 VD	228	led_dat->num_modes = template->num_modes;
11efe71f SG	229
	230	ret = ns2_led_get_mode(led_dat, &mode);
	231	if (ret < 0)
04195823	232	return ret;
11efe71f SG	233
	234	/* Set LED initial state. */
	235	led_dat->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
	236	led_dat->cdev.brightness =
	237	(mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;
	238
	239	ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
	240	if (ret < 0)
04195823	241	return ret;
11efe71f	242
11efe71f	243	return 0;
11efe71f SG	244	}
11efe71f SG	245
b8cd742a	246	static void delete_ns2_led(struct ns2_led_data *led_dat)
11efe71f	247	{
11efe71f	248	led_classdev_unregister(&led_dat->cdev);
11efe71f SG	249	}
11efe71f SG	250
72052fcc SG	251	#ifdef CONFIG_OF_GPIO
	252	/*
	253	* Translate OpenFirmware node properties into platform_data.
	254	*/
cf4af012	255	static int
72052fcc SG	256	ns2_leds_get_of_pdata(struct device dev, struct ns2_led_platform_data pdata)
	257	{
	258	struct device_node *np = dev->of_node;
	259	struct device_node *child;
f7fafd08	260	struct ns2_led led, leds;
72052fcc	261	int num_leds = 0;
72052fcc SG	262
	263	num_leds = of_get_child_count(np);
	264	if (!num_leds)
	265	return -ENODEV;
	266
	267	leds = devm_kzalloc(dev, num_leds * sizeof(struct ns2_led),
	268	GFP_KERNEL);
	269	if (!leds)
	270	return -ENOMEM;
	271
f7fafd08	272	led = leds;
72052fcc SG	273	for_each_child_of_node(np, child) {
72052fcc SG	274	const char *string;
f7fafd08 VD	275	int ret, i, num_modes;
f7fafd08 VD	276	struct ns2_led_modval *modval;
72052fcc SG	277
	278	ret = of_get_named_gpio(child, "cmd-gpio", 0);
	279	if (ret < 0)
	280	return ret;
f7fafd08	281	led->cmd = ret;
72052fcc SG	282	ret = of_get_named_gpio(child, "slow-gpio", 0);
	283	if (ret < 0)
	284	return ret;
f7fafd08	285	led->slow = ret;
72052fcc	286	ret = of_property_read_string(child, "label", &string);
f7fafd08	287	led->name = (ret == 0) ? string : child->name;
72052fcc SG	288	ret = of_property_read_string(child, "linux,default-trigger",
	289	&string);
	290	if (ret == 0)
f7fafd08 VD	291	led->default_trigger = string;
	292
	293	ret = of_property_count_u32_elems(child, "modes-map");
	294	if (ret < 0 \|\| ret % 3) {
	295	dev_err(dev,
	296	"Missing or malformed modes-map property\n");
	297	return -EINVAL;
	298	}
	299
	300	num_modes = ret / 3;
	301	modval = devm_kzalloc(dev,
	302	num_modes * sizeof(struct ns2_led_modval),
	303	GFP_KERNEL);
	304	if (!modval)
	305	return -ENOMEM;
	306
	307	for (i = 0; i < num_modes; i++) {
	308	of_property_read_u32_index(child,
	309	"modes-map", 3 * i,
	310	(u32 *) &modval[i].mode);
	311	of_property_read_u32_index(child,
	312	"modes-map", 3 * i + 1,
	313	(u32 *) &modval[i].cmd_level);
	314	of_property_read_u32_index(child,
	315	"modes-map", 3 * i + 2,
	316	(u32 *) &modval[i].slow_level);
	317	}
	318
	319	led->num_modes = num_modes;
	320	led->modval = modval;
72052fcc	321
f7fafd08	322	led++;
72052fcc SG	323	}
	324
	325	pdata->leds = leds;
	326	pdata->num_leds = num_leds;
	327
	328	return 0;
	329	}
	330
	331	static const struct of_device_id of_ns2_leds_match[] = {
	332	{ .compatible = "lacie,ns2-leds", },
	333	{},
	334	};
98f9cc7f	335	MODULE_DEVICE_TABLE(of, of_ns2_leds_match);
72052fcc SG	336	#endif /* CONFIG_OF_GPIO */
72052fcc SG	337
3de1929b SG	338	struct ns2_led_priv {
	339	int num_leds;
	340	struct ns2_led_data leds_data[];
	341	};
	342
	343	static inline int sizeof_ns2_led_priv(int num_leds)
	344	{
	345	return sizeof(struct ns2_led_priv) +
	346	(sizeof(struct ns2_led_data) * num_leds);
	347	}
	348
98ea1ea2	349	static int ns2_led_probe(struct platform_device *pdev)
11efe71f	350	{
87aae1ea	351	struct ns2_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
3de1929b	352	struct ns2_led_priv *priv;
11efe71f SG	353	int i;
	354	int ret;
	355
72052fcc SG	356	#ifdef CONFIG_OF_GPIO
	357	if (!pdata) {
	358	pdata = devm_kzalloc(&pdev->dev,
	359	sizeof(struct ns2_led_platform_data),
	360	GFP_KERNEL);
	361	if (!pdata)
	362	return -ENOMEM;
	363
	364	ret = ns2_leds_get_of_pdata(&pdev->dev, pdata);
	365	if (ret)
	366	return ret;
	367	}
	368	#else
11efe71f SG	369	if (!pdata)
11efe71f SG	370	return -EINVAL;
72052fcc	371	#endif /* CONFIG_OF_GPIO */
11efe71f	372
3de1929b SG	373	priv = devm_kzalloc(&pdev->dev,
	374	sizeof_ns2_led_priv(pdata->num_leds), GFP_KERNEL);
	375	if (!priv)
11efe71f	376	return -ENOMEM;
3de1929b	377	priv->num_leds = pdata->num_leds;
11efe71f	378
3de1929b SG	379	for (i = 0; i < priv->num_leds; i++) {
	380	ret = create_ns2_led(pdev, &priv->leds_data[i],
	381	&pdata->leds[i]);
a209f766 BW	382	if (ret < 0) {
a209f766 BW	383	for (i = i - 1; i >= 0; i--)
3de1929b	384	delete_ns2_led(&priv->leds_data[i]);
a209f766 BW	385	return ret;
a209f766 BW	386	}
11efe71f SG	387	}
11efe71f SG	388
3de1929b	389	platform_set_drvdata(pdev, priv);
11efe71f SG	390
11efe71f SG	391	return 0;
11efe71f SG	392	}
11efe71f SG	393
678e8a6b	394	static int ns2_led_remove(struct platform_device *pdev)
11efe71f SG	395	{
11efe71f SG	396	int i;
3de1929b	397	struct ns2_led_priv *priv;
11efe71f	398
3de1929b	399	priv = platform_get_drvdata(pdev);
11efe71f	400
3de1929b SG	401	for (i = 0; i < priv->num_leds; i++)
3de1929b SG	402	delete_ns2_led(&priv->leds_data[i]);
11efe71f	403
11efe71f SG	404	return 0;
	405	}
	406
	407	static struct platform_driver ns2_led_driver = {
	408	.probe = ns2_led_probe,
df07cf81	409	.remove = ns2_led_remove,
11efe71f	410	.driver = {
72052fcc	411	.name = "leds-ns2",
72052fcc	412	.of_match_table = of_match_ptr(of_ns2_leds_match),
11efe71f SG	413	},
11efe71f SG	414	};
11efe71f	415
892a8843	416	module_platform_driver(ns2_led_driver);
11efe71f SG	417
	418	MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
	419	MODULE_DESCRIPTION("Network Space v2 LED driver");
	420	MODULE_LICENSE("GPL");
892a8843	421	MODULE_ALIAS("platform:leds-ns2");