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

// 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 <[email protected]>
 *
 * Based on leds-gpio.c by Raphael Assenat <[email protected]>
 */

#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 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 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_kcalloc(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 <[email protected]>");
MODULE_DESCRIPTION("Network Space v2 LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:leds-ns2");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
11efe71f SG	2	/*
	3	* leds-ns2.c - Driver for the Network Space v2 (and parents) dual-GPIO LED
	4	*
	5	* Copyright (C) 2010 LaCie
	6	*
	7	* Author: Simon Guinot <[email protected]>
	8	*
	9	* Based on leds-gpio.c by Raphael Assenat <[email protected]>
11efe71f SG	10	*/
	11
	12	#include <linux/kernel.h>
11efe71f SG	13	#include <linux/platform_device.h>
	14	#include <linux/slab.h>
	15	#include <linux/gpio.h>
	16	#include <linux/leds.h>
54f4dedb	17	#include <linux/module.h>
c02cecb9	18	#include <linux/platform_data/leds-kirkwood-ns2.h>
c68f46dd	19	#include <linux/of.h>
72052fcc	20	#include <linux/of_gpio.h>
4b90432d	21	#include "leds.h"
11efe71f SG	22
11efe71f SG	23	/*
f7fafd08 VD	24	* The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
	25	* modes are available: off, on and SATA activity blinking. The LED modes are
	26	* controlled through two GPIOs (command and slow): each combination of values
	27	* for the command/slow GPIOs corresponds to a LED mode.
11efe71f SG	28	*/
11efe71f SG	29
11efe71f SG	30	struct ns2_led_data {
11efe71f SG	31	struct led_classdev cdev;
2224f2ff KEP	32	unsigned int cmd;
2224f2ff KEP	33	unsigned int slow;
4b90432d	34	bool can_sleep;
11efe71f SG	35	unsigned char sata; /* True when SATA mode active. */
11efe71f SG	36	rwlock_t rw_lock; /* Lock GPIOs. */
f7fafd08 VD	37	int num_modes;
f7fafd08 VD	38	struct ns2_led_modval *modval;
11efe71f SG	39	};
	40
	41	static int ns2_led_get_mode(struct ns2_led_data *led_dat,
	42	enum ns2_led_modes *mode)
	43	{
	44	int i;
	45	int ret = -EINVAL;
	46	int cmd_level;
	47	int slow_level;
	48
4b90432d SG	49	cmd_level = gpio_get_value_cansleep(led_dat->cmd);
4b90432d SG	50	slow_level = gpio_get_value_cansleep(led_dat->slow);
11efe71f	51
f7fafd08 VD	52	for (i = 0; i < led_dat->num_modes; i++) {
	53	if (cmd_level == led_dat->modval[i].cmd_level &&
	54	slow_level == led_dat->modval[i].slow_level) {
	55	*mode = led_dat->modval[i].mode;
11efe71f SG	56	ret = 0;
	57	break;
	58	}
	59	}
	60
11efe71f SG	61	return ret;
	62	}
	63
	64	static void ns2_led_set_mode(struct ns2_led_data *led_dat,
	65	enum ns2_led_modes mode)
	66	{
	67	int i;
4b90432d	68	bool found = false;
f539dfed	69	unsigned long flags;
11efe71f	70
4b90432d	71	for (i = 0; i < led_dat->num_modes; i++)
f7fafd08	72	if (mode == led_dat->modval[i].mode) {
4b90432d SG	73	found = true;
4b90432d SG	74	break;
11efe71f	75	}
4b90432d SG	76
	77	if (!found)
	78	return;
	79
	80	write_lock_irqsave(&led_dat->rw_lock, flags);
	81
	82	if (!led_dat->can_sleep) {
	83	gpio_set_value(led_dat->cmd,
	84	led_dat->modval[i].cmd_level);
	85	gpio_set_value(led_dat->slow,
	86	led_dat->modval[i].slow_level);
	87	goto exit_unlock;
11efe71f SG	88	}
11efe71f SG	89
c29e650b JA	90	gpio_set_value_cansleep(led_dat->cmd, led_dat->modval[i].cmd_level);
c29e650b JA	91	gpio_set_value_cansleep(led_dat->slow, led_dat->modval[i].slow_level);
4b90432d SG	92
4b90432d SG	93	exit_unlock:
f539dfed	94	write_unlock_irqrestore(&led_dat->rw_lock, flags);
11efe71f SG	95	}
	96
	97	static void ns2_led_set(struct led_classdev *led_cdev,
	98	enum led_brightness value)
	99	{
	100	struct ns2_led_data *led_dat =
	101	container_of(led_cdev, struct ns2_led_data, cdev);
	102	enum ns2_led_modes mode;
	103
	104	if (value == LED_OFF)
	105	mode = NS_V2_LED_OFF;
	106	else if (led_dat->sata)
	107	mode = NS_V2_LED_SATA;
	108	else
	109	mode = NS_V2_LED_ON;
	110
	111	ns2_led_set_mode(led_dat, mode);
	112	}
	113
c29e650b JA	114	static int ns2_led_set_blocking(struct led_classdev *led_cdev,
	115	enum led_brightness value)
	116	{
	117	ns2_led_set(led_cdev, value);
	118	return 0;
	119	}
	120
11efe71f SG	121	static ssize_t ns2_led_sata_store(struct device *dev,
	122	struct device_attribute *attr,
	123	const char *buff, size_t count)
	124	{
e5971bbc SG	125	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	126	struct ns2_led_data *led_dat =
	127	container_of(led_cdev, struct ns2_led_data, cdev);
11efe71f SG	128	int ret;
11efe71f SG	129	unsigned long enable;
11efe71f	130
3874350c	131	ret = kstrtoul(buff, 10, &enable);
11efe71f SG	132	if (ret < 0)
	133	return ret;
	134
	135	enable = !!enable;
	136
	137	if (led_dat->sata == enable)
4b90432d	138	goto exit;
11efe71f	139
4b90432d SG	140	led_dat->sata = enable;
	141
	142	if (!led_get_brightness(led_cdev))
	143	goto exit;
11efe71f	144
4b90432d	145	if (enable)
11efe71f	146	ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
4b90432d	147	else
11efe71f SG	148	ns2_led_set_mode(led_dat, NS_V2_LED_ON);
11efe71f SG	149
4b90432d	150	exit:
11efe71f SG	151	return count;
	152	}
	153
	154	static ssize_t ns2_led_sata_show(struct device *dev,
	155	struct device_attribute attr, char buf)
	156	{
e5971bbc SG	157	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	158	struct ns2_led_data *led_dat =
	159	container_of(led_cdev, struct ns2_led_data, cdev);
11efe71f SG	160
	161	return sprintf(buf, "%d\n", led_dat->sata);
	162	}
	163
	164	static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);
	165
475f8548 JH	166	static struct attribute *ns2_led_attrs[] = {
	167	&dev_attr_sata.attr,
	168	NULL
	169	};
	170	ATTRIBUTE_GROUPS(ns2_led);
	171
98ea1ea2	172	static int
11efe71f SG	173	create_ns2_led(struct platform_device pdev, struct ns2_led_data led_dat,
	174	const struct ns2_led *template)
	175	{
	176	int ret;
	177	enum ns2_led_modes mode;
	178
04195823	179	ret = devm_gpio_request_one(&pdev->dev, template->cmd,
4b90432d	180	gpio_get_value_cansleep(template->cmd) ?
9d04cbaa	181	GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
31c3dc74	182	template->name);
11efe71f SG	183	if (ret) {
	184	dev_err(&pdev->dev, "%s: failed to setup command GPIO\n",
	185	template->name);
31c3dc74	186	return ret;
11efe71f SG	187	}
11efe71f SG	188
04195823	189	ret = devm_gpio_request_one(&pdev->dev, template->slow,
4b90432d	190	gpio_get_value_cansleep(template->slow) ?
9d04cbaa	191	GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
31c3dc74	192	template->name);
11efe71f SG	193	if (ret) {
	194	dev_err(&pdev->dev, "%s: failed to setup slow GPIO\n",
	195	template->name);
04195823	196	return ret;
11efe71f SG	197	}
	198
	199	rwlock_init(&led_dat->rw_lock);
	200
	201	led_dat->cdev.name = template->name;
	202	led_dat->cdev.default_trigger = template->default_trigger;
	203	led_dat->cdev.blink_set = NULL;
11efe71f	204	led_dat->cdev.flags \|= LED_CORE_SUSPENDRESUME;
475f8548	205	led_dat->cdev.groups = ns2_led_groups;
11efe71f SG	206	led_dat->cmd = template->cmd;
11efe71f SG	207	led_dat->slow = template->slow;
4b90432d SG	208	led_dat->can_sleep = gpio_cansleep(led_dat->cmd) \|
4b90432d SG	209	gpio_cansleep(led_dat->slow);
c29e650b JA	210	if (led_dat->can_sleep)
	211	led_dat->cdev.brightness_set_blocking = ns2_led_set_blocking;
	212	else
	213	led_dat->cdev.brightness_set = ns2_led_set;
f7fafd08 VD	214	led_dat->modval = template->modval;
f7fafd08 VD	215	led_dat->num_modes = template->num_modes;
11efe71f SG	216
	217	ret = ns2_led_get_mode(led_dat, &mode);
	218	if (ret < 0)
04195823	219	return ret;
11efe71f SG	220
	221	/* Set LED initial state. */
	222	led_dat->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
	223	led_dat->cdev.brightness =
	224	(mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;
	225
	226	ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
	227	if (ret < 0)
04195823	228	return ret;
11efe71f	229
11efe71f	230	return 0;
11efe71f SG	231	}
11efe71f SG	232
b8cd742a	233	static void delete_ns2_led(struct ns2_led_data *led_dat)
11efe71f	234	{
11efe71f	235	led_classdev_unregister(&led_dat->cdev);
11efe71f SG	236	}
11efe71f SG	237
72052fcc SG	238	#ifdef CONFIG_OF_GPIO
	239	/*
	240	* Translate OpenFirmware node properties into platform_data.
	241	*/
cf4af012	242	static int
72052fcc SG	243	ns2_leds_get_of_pdata(struct device dev, struct ns2_led_platform_data pdata)
	244	{
	245	struct device_node *np = dev->of_node;
	246	struct device_node *child;
f7fafd08	247	struct ns2_led led, leds;
72052fcc	248	int num_leds = 0;
72052fcc SG	249
	250	num_leds = of_get_child_count(np);
	251	if (!num_leds)
	252	return -ENODEV;
	253
a86854d0	254	leds = devm_kcalloc(dev, num_leds, sizeof(struct ns2_led),
72052fcc SG	255	GFP_KERNEL);
	256	if (!leds)
	257	return -ENOMEM;
	258
f7fafd08	259	led = leds;
72052fcc SG	260	for_each_child_of_node(np, child) {
72052fcc SG	261	const char *string;
f7fafd08 VD	262	int ret, i, num_modes;
f7fafd08 VD	263	struct ns2_led_modval *modval;
72052fcc SG	264
	265	ret = of_get_named_gpio(child, "cmd-gpio", 0);
	266	if (ret < 0)
	267	return ret;
f7fafd08	268	led->cmd = ret;
72052fcc SG	269	ret = of_get_named_gpio(child, "slow-gpio", 0);
	270	if (ret < 0)
	271	return ret;
f7fafd08	272	led->slow = ret;
72052fcc	273	ret = of_property_read_string(child, "label", &string);
f7fafd08	274	led->name = (ret == 0) ? string : child->name;
72052fcc SG	275	ret = of_property_read_string(child, "linux,default-trigger",
	276	&string);
	277	if (ret == 0)
f7fafd08 VD	278	led->default_trigger = string;
	279
	280	ret = of_property_count_u32_elems(child, "modes-map");
	281	if (ret < 0 \|\| ret % 3) {
	282	dev_err(dev,
	283	"Missing or malformed modes-map property\n");
	284	return -EINVAL;
	285	}
	286
	287	num_modes = ret / 3;
a86854d0 KC	288	modval = devm_kcalloc(dev,
	289	num_modes,
	290	sizeof(struct ns2_led_modval),
f7fafd08 VD	291	GFP_KERNEL);
	292	if (!modval)
	293	return -ENOMEM;
	294
	295	for (i = 0; i < num_modes; i++) {
	296	of_property_read_u32_index(child,
	297	"modes-map", 3 * i,
	298	(u32 *) &modval[i].mode);
	299	of_property_read_u32_index(child,
	300	"modes-map", 3 * i + 1,
	301	(u32 *) &modval[i].cmd_level);
	302	of_property_read_u32_index(child,
	303	"modes-map", 3 * i + 2,
	304	(u32 *) &modval[i].slow_level);
	305	}
	306
	307	led->num_modes = num_modes;
	308	led->modval = modval;
72052fcc	309
f7fafd08	310	led++;
72052fcc SG	311	}
	312
	313	pdata->leds = leds;
	314	pdata->num_leds = num_leds;
	315
	316	return 0;
	317	}
	318
	319	static const struct of_device_id of_ns2_leds_match[] = {
	320	{ .compatible = "lacie,ns2-leds", },
	321	{},
	322	};
98f9cc7f	323	MODULE_DEVICE_TABLE(of, of_ns2_leds_match);
72052fcc SG	324	#endif /* CONFIG_OF_GPIO */
72052fcc SG	325
3de1929b SG	326	struct ns2_led_priv {
	327	int num_leds;
	328	struct ns2_led_data leds_data[];
	329	};
	330
	331	static inline int sizeof_ns2_led_priv(int num_leds)
	332	{
	333	return sizeof(struct ns2_led_priv) +
	334	(sizeof(struct ns2_led_data) * num_leds);
	335	}
	336
98ea1ea2	337	static int ns2_led_probe(struct platform_device *pdev)
11efe71f	338	{
87aae1ea	339	struct ns2_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
3de1929b	340	struct ns2_led_priv *priv;
11efe71f SG	341	int i;
	342	int ret;
	343
72052fcc SG	344	#ifdef CONFIG_OF_GPIO
	345	if (!pdata) {
	346	pdata = devm_kzalloc(&pdev->dev,
	347	sizeof(struct ns2_led_platform_data),
	348	GFP_KERNEL);
	349	if (!pdata)
	350	return -ENOMEM;
	351
	352	ret = ns2_leds_get_of_pdata(&pdev->dev, pdata);
	353	if (ret)
	354	return ret;
	355	}
	356	#else
11efe71f SG	357	if (!pdata)
11efe71f SG	358	return -EINVAL;
72052fcc	359	#endif /* CONFIG_OF_GPIO */
11efe71f	360
3de1929b SG	361	priv = devm_kzalloc(&pdev->dev,
	362	sizeof_ns2_led_priv(pdata->num_leds), GFP_KERNEL);
	363	if (!priv)
11efe71f	364	return -ENOMEM;
3de1929b	365	priv->num_leds = pdata->num_leds;
11efe71f	366
3de1929b SG	367	for (i = 0; i < priv->num_leds; i++) {
	368	ret = create_ns2_led(pdev, &priv->leds_data[i],
	369	&pdata->leds[i]);
a209f766 BW	370	if (ret < 0) {
a209f766 BW	371	for (i = i - 1; i >= 0; i--)
3de1929b	372	delete_ns2_led(&priv->leds_data[i]);
a209f766 BW	373	return ret;
a209f766 BW	374	}
11efe71f SG	375	}
11efe71f SG	376
3de1929b	377	platform_set_drvdata(pdev, priv);
11efe71f SG	378
11efe71f SG	379	return 0;
11efe71f SG	380	}
11efe71f SG	381
678e8a6b	382	static int ns2_led_remove(struct platform_device *pdev)
11efe71f SG	383	{
11efe71f SG	384	int i;
3de1929b	385	struct ns2_led_priv *priv;
11efe71f	386
3de1929b	387	priv = platform_get_drvdata(pdev);
11efe71f	388
3de1929b SG	389	for (i = 0; i < priv->num_leds; i++)
3de1929b SG	390	delete_ns2_led(&priv->leds_data[i]);
11efe71f	391
11efe71f SG	392	return 0;
	393	}
	394
	395	static struct platform_driver ns2_led_driver = {
	396	.probe = ns2_led_probe,
df07cf81	397	.remove = ns2_led_remove,
11efe71f	398	.driver = {
72052fcc	399	.name = "leds-ns2",
72052fcc	400	.of_match_table = of_match_ptr(of_ns2_leds_match),
11efe71f SG	401	},
11efe71f SG	402	};
11efe71f	403
892a8843	404	module_platform_driver(ns2_led_driver);
11efe71f SG	405
	406	MODULE_AUTHOR("Simon Guinot <[email protected]>");
	407	MODULE_DESCRIPTION("Network Space v2 LED driver");
	408	MODULE_LICENSE("GPL");
892a8843	409	MODULE_ALIAS("platform:leds-ns2");