leds: add LED driver for Network Space v2 LEDs

This patch add a LED class driver for the dual-GPIO LEDs found on the Network Space v2 board (and parents). This include Internet Space v2, Network Space (Max) v2 and d2 Network v2 boards. This dual-GPIO LED is wired to a CPLD and can blink in relation with the SATA activity. The driver expose this capability through a "sata" sysfs attribute. Signed-off-by: Simon Guinot <sguinot@lacie.com> Signed-off-by: Nicolas Pitre <nico@fluxnic.net>

leds: add LED driver for Network Space v2 LEDs
This patch add a LED class driver for the dual-GPIO LEDs found on the Network Space v2 board (and parents). This include Internet Space v2, Network Space (Max) v2 and d2 Network v2 boards. This dual-GPIO LED is wired to a CPLD and can blink in relation with the SATA activity. The driver expose this capability through a "sata" sysfs attribute. Signed-off-by: Simon Guinot <sguinot@lacie.com> Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Simon Guinot · Nicolas Pitre
1 parent b6a044ff57
Showing 4 changed files with 374 additions and 0 deletions Side-by-side Diff
arch/arm/mach-kirkwood/include/mach/leds-ns2.h
drivers/leds/Kconfig
drivers/leds/Makefile
drivers/leds/leds-ns2.c
+/*
+ * arch/arm/mach-kirkwood/include/mach/leds-ns2.h
+ *
+ * Platform data structure for Network Space v2 LED driver
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __MACH_LEDS_NS2_H
+#define __MACH_LEDS_NS2_H
+
+struct ns2_led {
+	const char	*name;
+	const char	*default_trigger;
+	unsigned	cmd;
+	unsigned	slow;
+};
+
+struct ns2_led_platform_data {
+	int		num_leds;
+	struct ns2_led	*leds;
+};
+
+#endif /* __MACH_LEDS_NS2_H */
@@ -302,6 +302,15 @@
 	  This option enable support for on-chip LED drivers found
 	  on Freescale Semiconductor MC13783 PMIC.
  
+config LEDS_NS2
+	tristate "LED support for Network Space v2 GPIO LEDs"
+	depends on MACH_NETSPACE_V2 || MACH_INETSPACE_V2 || MACH_NETSPACE_MAX_V2
+	default y
+	help
+	  This option enable support for the dual-GPIO LED found on the
+	  Network Space v2 board (and parents). This include Internet Space v2,
+	  Network Space (Max) v2 and d2 Network v2 boards.
+
 config LEDS_TRIGGERS
 	bool "LED Trigger support"
 	help
@@ -37,6 +37,7 @@
 obj-$(CONFIG_LEDS_ADP5520)		+= leds-adp5520.o
 obj-$(CONFIG_LEDS_DELL_NETBOOKS)	+= dell-led.o
 obj-$(CONFIG_LEDS_MC13783)		+= leds-mc13783.o
+obj-$(CONFIG_LEDS_NS2)			+= leds-ns2.o
  
 # LED SPI Drivers
 obj-$(CONFIG_LEDS_DAC124S085)		+= leds-dac124s085.o
+/*
+ * 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/leds.h>
+#include <mach/leds-ns2.h>
+
+/*
+ * The Network Space v2 dual-GPIO LED is wired to a CPLD and can blink in
+ * relation with the SATA activity. This capability is exposed through the
+ * "sata" sysfs attribute.
+ *
+ * The following array detail the different LED registers and the combination
+ * of their possible values:
+ *
+ *  cmd_led   |  slow_led  | /SATA active | LED state
+ *            |            |              |
+ *     1      |     0      |      x       |  off
+ *     -      |     1      |      x       |  on
+ *     0      |     0      |      1       |  on
+ *     0      |     0      |      0       |  blink (rate 300ms)
+ */
+
+enum ns2_led_modes {
+	NS_V2_LED_OFF,
+	NS_V2_LED_ON,
+	NS_V2_LED_SATA,
+};
+
+struct ns2_led_mode_value {
+	enum ns2_led_modes	mode;
+	int			cmd_level;
+	int			slow_level;
+};
+
+static struct ns2_led_mode_value ns2_led_modval[] = {
+	{ NS_V2_LED_OFF	, 1, 0 },
+	{ NS_V2_LED_ON	, 0, 1 },
+	{ NS_V2_LED_ON	, 1, 1 },
+	{ NS_V2_LED_SATA, 0, 0 },
+};
+
+struct ns2_led_data {
+	struct led_classdev	cdev;
+	unsigned		cmd;
+	unsigned		slow;
+	unsigned char		sata; /* True when SATA mode active. */
+	rwlock_t		rw_lock; /* Lock GPIOs. */
+};
+
+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;
+
+	read_lock(&led_dat->rw_lock);
+
+	cmd_level = gpio_get_value(led_dat->cmd);
+	slow_level = gpio_get_value(led_dat->slow);
+
+	for (i = 0; i < ARRAY_SIZE(ns2_led_modval); i++) {
+		if (cmd_level == ns2_led_modval[i].cmd_level &&
+		    slow_level == ns2_led_modval[i].slow_level) {
+			*mode = ns2_led_modval[i].mode;
+			ret = 0;
+			break;
+		}
+	}
+
+	read_unlock(&led_dat->rw_lock);
+
+	return ret;
+}
+
+static void ns2_led_set_mode(struct ns2_led_data *led_dat,
+			     enum ns2_led_modes mode)
+{
+	int i;
+
+	write_lock(&led_dat->rw_lock);
+
+	for (i = 0; i < ARRAY_SIZE(ns2_led_modval); i++) {
+		if (mode == ns2_led_modval[i].mode) {
+			gpio_set_value(led_dat->cmd,
+				       ns2_led_modval[i].cmd_level);
+			gpio_set_value(led_dat->slow,
+				       ns2_led_modval[i].slow_level);
+		}
+	}
+
+	write_unlock(&led_dat->rw_lock);
+}
+
+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 ssize_t ns2_led_sata_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buff, size_t count)
+{
+	int ret;
+	unsigned long enable;
+	enum ns2_led_modes mode;
+	struct ns2_led_data *led_dat = dev_get_drvdata(dev);
+
+	ret = strict_strtoul(buff, 10, &enable);
+	if (ret < 0)
+		return ret;
+
+	enable = !!enable;
+
+	if (led_dat->sata == enable)
+		return count;
+
+	ret = ns2_led_get_mode(led_dat, &mode);
+	if (ret < 0)
+		return ret;
+
+	if (enable && mode == NS_V2_LED_ON)
+		ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
+	if (!enable && mode == NS_V2_LED_SATA)
+		ns2_led_set_mode(led_dat, NS_V2_LED_ON);
+
+	led_dat->sata = enable;
+
+	return count;
+}
+
+static ssize_t ns2_led_sata_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct ns2_led_data *led_dat = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%d\n", led_dat->sata);
+}
+
+static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);
+
+static int __devinit
+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 = gpio_request(template->cmd, template->name);
+	if (ret == 0) {
+		ret = gpio_direction_output(template->cmd,
+					    gpio_get_value(template->cmd));
+		if (ret)
+			gpio_free(template->cmd);
+	}
+	if (ret) {
+		dev_err(&pdev->dev, "%s: failed to setup command GPIO\n",
+			template->name);
+	}
+
+	ret = gpio_request(template->slow, template->name);
+	if (ret == 0) {
+		ret = gpio_direction_output(template->slow,
+					    gpio_get_value(template->slow));
+		if (ret)
+			gpio_free(template->slow);
+	}
+	if (ret) {
+		dev_err(&pdev->dev, "%s: failed to setup slow GPIO\n",
+			template->name);
+		goto err_free_cmd;
+	}
+
+	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.brightness_set = ns2_led_set;
+	led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+	led_dat->cmd = template->cmd;
+	led_dat->slow = template->slow;
+
+	ret = ns2_led_get_mode(led_dat, &mode);
+	if (ret < 0)
+		goto err_free_slow;
+
+	/* 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)
+		goto err_free_slow;
+
+	dev_set_drvdata(led_dat->cdev.dev, led_dat);
+	ret = device_create_file(led_dat->cdev.dev, &dev_attr_sata);
+	if (ret < 0)
+		goto err_free_cdev;
+
+	return 0;
+
+err_free_cdev:
+	led_classdev_unregister(&led_dat->cdev);
+err_free_slow:
+	gpio_free(led_dat->slow);
+err_free_cmd:
+	gpio_free(led_dat->cmd);
+
+	return ret;
+}
+
+static void __devexit delete_ns2_led(struct ns2_led_data *led_dat)
+{
+	device_remove_file(led_dat->cdev.dev, &dev_attr_sata);
+	led_classdev_unregister(&led_dat->cdev);
+	gpio_free(led_dat->cmd);
+	gpio_free(led_dat->slow);
+}
+
+static int __devinit ns2_led_probe(struct platform_device *pdev)
+{
+	struct ns2_led_platform_data *pdata = pdev->dev.platform_data;
+	struct ns2_led_data *leds_data;
+	int i;
+	int ret;
+
+	if (!pdata)
+		return -EINVAL;
+
+	leds_data = kzalloc(sizeof(struct ns2_led_data) *
+			    pdata->num_leds, GFP_KERNEL);
+	if (!leds_data)
+		return -ENOMEM;
+
+	for (i = 0; i < pdata->num_leds; i++) {
+		ret = create_ns2_led(pdev, &leds_data[i], &pdata->leds[i]);
+		if (ret < 0)
+			goto err;
+
+	}
+
+	platform_set_drvdata(pdev, leds_data);
+
+	return 0;
+
+err:
+	for (i = i - 1; i >= 0; i--)
+		delete_ns2_led(&leds_data[i]);
+
+	kfree(leds_data);
+
+	return ret;
+}
+
+static int __devexit ns2_led_remove(struct platform_device *pdev)
+{
+	int i;
+	struct ns2_led_platform_data *pdata = pdev->dev.platform_data;
+	struct ns2_led_data *leds_data;
+
+	leds_data = platform_get_drvdata(pdev);
+
+	for (i = 0; i < pdata->num_leds; i++)
+		delete_ns2_led(&leds_data[i]);
+
+	kfree(leds_data);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver ns2_led_driver = {
+	.probe		= ns2_led_probe,
+	.remove		= __devexit_p(ns2_led_remove),
+	.driver		= {
+		.name	= "leds-ns2",
+		.owner	= THIS_MODULE,
+	},
+};
+MODULE_ALIAS("platform:leds-ns2");
+
+static int __init ns2_led_init(void)
+{
+	return platform_driver_register(&ns2_led_driver);
+}
+
+static void __exit ns2_led_exit(void)
+{
+	platform_driver_unregister(&ns2_led_driver);
+}
+
+module_init(ns2_led_init);
+module_exit(ns2_led_exit);
+
+MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
+MODULE_DESCRIPTION("Network Space v2 LED driver");
+MODULE_LICENSE("GPL");
	1	+/*
	2	+ * arch/arm/mach-kirkwood/include/mach/leds-ns2.h
	3	+ *
	4	+ * Platform data structure for Network Space v2 LED driver
	5	+ *
	6	+ * This file is licensed under the terms of the GNU General Public
	7	+ * License version 2. This program is licensed "as is" without any
	8	+ * warranty of any kind, whether express or implied.
	9	+ */
	10	+
	11	+#ifndef __MACH_LEDS_NS2_H
	12	+#define __MACH_LEDS_NS2_H
	13	+
	14	+struct ns2_led {
	15	+ const char *name;
	16	+ const char *default_trigger;
	17	+ unsigned cmd;
	18	+ unsigned slow;
	19	+};
	20	+
	21	+struct ns2_led_platform_data {
	22	+ int num_leds;
	23	+ struct ns2_led *leds;
	24	+};
	25	+
	26	+#endif /* __MACH_LEDS_NS2_H */
...	...	@@ -302,6 +302,15 @@
302	302	This option enable support for on-chip LED drivers found
303	303	on Freescale Semiconductor MC13783 PMIC.
304	304
	305	+config LEDS_NS2
	306	+ tristate "LED support for Network Space v2 GPIO LEDs"
	307	+ depends on MACH_NETSPACE_V2 \|\| MACH_INETSPACE_V2 \|\| MACH_NETSPACE_MAX_V2
	308	+ default y
	309	+ help
	310	+ This option enable support for the dual-GPIO LED found on the
	311	+ Network Space v2 board (and parents). This include Internet Space v2,
	312	+ Network Space (Max) v2 and d2 Network v2 boards.
	313	+
305	314	config LEDS_TRIGGERS
306	315	bool "LED Trigger support"
307	316	help
...	...	@@ -37,6 +37,7 @@
37	37	obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o
38	38	obj-$(CONFIG_LEDS_DELL_NETBOOKS) += dell-led.o
39	39	obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
	40	+obj-$(CONFIG_LEDS_NS2) += leds-ns2.o
40	41
41	42	# LED SPI Drivers
42	43	obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
	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>
	26	+#include <linux/init.h>
	27	+#include <linux/platform_device.h>
	28	+#include <linux/slab.h>
	29	+#include <linux/gpio.h>
	30	+#include <linux/leds.h>
	31	+#include <mach/leds-ns2.h>
	32	+
	33	+/*
	34	+ * The Network Space v2 dual-GPIO LED is wired to a CPLD and can blink in
	35	+ * relation with the SATA activity. This capability is exposed through the
	36	+ * "sata" sysfs attribute.
	37	+ *
	38	+ * The following array detail the different LED registers and the combination
	39	+ * of their possible values:
	40	+ *
	41	+ * cmd_led \| slow_led \| /SATA active \| LED state
	42	+ * \| \| \|
	43	+ * 1 \| 0 \| x \| off
	44	+ * - \| 1 \| x \| on
	45	+ * 0 \| 0 \| 1 \| on
	46	+ * 0 \| 0 \| 0 \| blink (rate 300ms)
	47	+ */
	48	+
	49	+enum ns2_led_modes {
	50	+ NS_V2_LED_OFF,
	51	+ NS_V2_LED_ON,
	52	+ NS_V2_LED_SATA,
	53	+};
	54	+
	55	+struct ns2_led_mode_value {
	56	+ enum ns2_led_modes mode;
	57	+ int cmd_level;
	58	+ int slow_level;
	59	+};
	60	+
	61	+static struct ns2_led_mode_value ns2_led_modval[] = {
	62	+ { NS_V2_LED_OFF , 1, 0 },
	63	+ { NS_V2_LED_ON , 0, 1 },
	64	+ { NS_V2_LED_ON , 1, 1 },
	65	+ { NS_V2_LED_SATA, 0, 0 },
	66	+};
	67	+
	68	+struct ns2_led_data {
	69	+ struct led_classdev cdev;
	70	+ unsigned cmd;
	71	+ unsigned slow;
	72	+ unsigned char sata; /* True when SATA mode active. */
	73	+ rwlock_t rw_lock; /* Lock GPIOs. */
	74	+};
	75	+
	76	+static int ns2_led_get_mode(struct ns2_led_data *led_dat,
	77	+ enum ns2_led_modes *mode)
	78	+{
	79	+ int i;
	80	+ int ret = -EINVAL;
	81	+ int cmd_level;
	82	+ int slow_level;
	83	+
	84	+ read_lock(&led_dat->rw_lock);
	85	+
	86	+ cmd_level = gpio_get_value(led_dat->cmd);
	87	+ slow_level = gpio_get_value(led_dat->slow);
	88	+
	89	+ for (i = 0; i < ARRAY_SIZE(ns2_led_modval); i++) {
	90	+ if (cmd_level == ns2_led_modval[i].cmd_level &&
	91	+ slow_level == ns2_led_modval[i].slow_level) {
	92	+ *mode = ns2_led_modval[i].mode;
	93	+ ret = 0;
	94	+ break;
	95	+ }
	96	+ }
	97	+
	98	+ read_unlock(&led_dat->rw_lock);
	99	+
	100	+ return ret;
	101	+}
	102	+
	103	+static void ns2_led_set_mode(struct ns2_led_data *led_dat,
	104	+ enum ns2_led_modes mode)
	105	+{
	106	+ int i;
	107	+
	108	+ write_lock(&led_dat->rw_lock);
	109	+
	110	+ for (i = 0; i < ARRAY_SIZE(ns2_led_modval); i++) {
	111	+ if (mode == ns2_led_modval[i].mode) {
	112	+ gpio_set_value(led_dat->cmd,
	113	+ ns2_led_modval[i].cmd_level);
	114	+ gpio_set_value(led_dat->slow,
	115	+ ns2_led_modval[i].slow_level);
	116	+ }
	117	+ }
	118	+
	119	+ write_unlock(&led_dat->rw_lock);
	120	+}
	121	+
	122	+static void ns2_led_set(struct led_classdev *led_cdev,
	123	+ enum led_brightness value)
	124	+{
	125	+ struct ns2_led_data *led_dat =
	126	+ container_of(led_cdev, struct ns2_led_data, cdev);
	127	+ enum ns2_led_modes mode;
	128	+
	129	+ if (value == LED_OFF)
	130	+ mode = NS_V2_LED_OFF;
	131	+ else if (led_dat->sata)
	132	+ mode = NS_V2_LED_SATA;
	133	+ else
	134	+ mode = NS_V2_LED_ON;
	135	+
	136	+ ns2_led_set_mode(led_dat, mode);
	137	+}
	138	+
	139	+static ssize_t ns2_led_sata_store(struct device *dev,
	140	+ struct device_attribute *attr,
	141	+ const char *buff, size_t count)
	142	+{
	143	+ int ret;
	144	+ unsigned long enable;
	145	+ enum ns2_led_modes mode;
	146	+ struct ns2_led_data *led_dat = dev_get_drvdata(dev);
	147	+
	148	+ ret = strict_strtoul(buff, 10, &enable);
	149	+ if (ret < 0)
	150	+ return ret;
	151	+
	152	+ enable = !!enable;
	153	+
	154	+ if (led_dat->sata == enable)
	155	+ return count;
	156	+
	157	+ ret = ns2_led_get_mode(led_dat, &mode);
	158	+ if (ret < 0)
	159	+ return ret;
	160	+
	161	+ if (enable && mode == NS_V2_LED_ON)
	162	+ ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
	163	+ if (!enable && mode == NS_V2_LED_SATA)
	164	+ ns2_led_set_mode(led_dat, NS_V2_LED_ON);
	165	+
	166	+ led_dat->sata = enable;
	167	+
	168	+ return count;
	169	+}
	170	+
	171	+static ssize_t ns2_led_sata_show(struct device *dev,
	172	+ struct device_attribute attr, char buf)
	173	+{
	174	+ struct ns2_led_data *led_dat = dev_get_drvdata(dev);
	175	+
	176	+ return sprintf(buf, "%d\n", led_dat->sata);
	177	+}
	178	+
	179	+static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);
	180	+
	181	+static int __devinit
	182	+create_ns2_led(struct platform_device pdev, struct ns2_led_data led_dat,
	183	+ const struct ns2_led *template)
	184	+{
	185	+ int ret;
	186	+ enum ns2_led_modes mode;
	187	+
	188	+ ret = gpio_request(template->cmd, template->name);
	189	+ if (ret == 0) {
	190	+ ret = gpio_direction_output(template->cmd,
	191	+ gpio_get_value(template->cmd));
	192	+ if (ret)
	193	+ gpio_free(template->cmd);
	194	+ }
	195	+ if (ret) {
	196	+ dev_err(&pdev->dev, "%s: failed to setup command GPIO\n",
	197	+ template->name);
	198	+ }
	199	+
	200	+ ret = gpio_request(template->slow, template->name);
	201	+ if (ret == 0) {
	202	+ ret = gpio_direction_output(template->slow,
	203	+ gpio_get_value(template->slow));
	204	+ if (ret)
	205	+ gpio_free(template->slow);
	206	+ }
	207	+ if (ret) {
	208	+ dev_err(&pdev->dev, "%s: failed to setup slow GPIO\n",
	209	+ template->name);
	210	+ goto err_free_cmd;
	211	+ }
	212	+
	213	+ rwlock_init(&led_dat->rw_lock);
	214	+
	215	+ led_dat->cdev.name = template->name;
	216	+ led_dat->cdev.default_trigger = template->default_trigger;
	217	+ led_dat->cdev.blink_set = NULL;
	218	+ led_dat->cdev.brightness_set = ns2_led_set;
	219	+ led_dat->cdev.flags \|= LED_CORE_SUSPENDRESUME;
	220	+ led_dat->cmd = template->cmd;
	221	+ led_dat->slow = template->slow;
	222	+
	223	+ ret = ns2_led_get_mode(led_dat, &mode);
	224	+ if (ret < 0)
	225	+ goto err_free_slow;
	226	+
	227	+ /* Set LED initial state. */
	228	+ led_dat->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
	229	+ led_dat->cdev.brightness =
	230	+ (mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;
	231	+
	232	+ ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
	233	+ if (ret < 0)
	234	+ goto err_free_slow;
	235	+
	236	+ dev_set_drvdata(led_dat->cdev.dev, led_dat);
	237	+ ret = device_create_file(led_dat->cdev.dev, &dev_attr_sata);
	238	+ if (ret < 0)
	239	+ goto err_free_cdev;
	240	+
	241	+ return 0;
	242	+
	243	+err_free_cdev:
	244	+ led_classdev_unregister(&led_dat->cdev);
	245	+err_free_slow:
	246	+ gpio_free(led_dat->slow);
	247	+err_free_cmd:
	248	+ gpio_free(led_dat->cmd);
	249	+
	250	+ return ret;
	251	+}
	252	+
	253	+static void __devexit delete_ns2_led(struct ns2_led_data *led_dat)
	254	+{
	255	+ device_remove_file(led_dat->cdev.dev, &dev_attr_sata);
	256	+ led_classdev_unregister(&led_dat->cdev);
	257	+ gpio_free(led_dat->cmd);
	258	+ gpio_free(led_dat->slow);
	259	+}
	260	+
	261	+static int __devinit ns2_led_probe(struct platform_device *pdev)
	262	+{
	263	+ struct ns2_led_platform_data *pdata = pdev->dev.platform_data;
	264	+ struct ns2_led_data *leds_data;
	265	+ int i;
	266	+ int ret;
	267	+
	268	+ if (!pdata)
	269	+ return -EINVAL;
	270	+
	271	+ leds_data = kzalloc(sizeof(struct ns2_led_data) *
	272	+ pdata->num_leds, GFP_KERNEL);
	273	+ if (!leds_data)
	274	+ return -ENOMEM;
	275	+
	276	+ for (i = 0; i < pdata->num_leds; i++) {
	277	+ ret = create_ns2_led(pdev, &leds_data[i], &pdata->leds[i]);
	278	+ if (ret < 0)
	279	+ goto err;
	280	+
	281	+ }
	282	+
	283	+ platform_set_drvdata(pdev, leds_data);
	284	+
	285	+ return 0;
	286	+
	287	+err:
	288	+ for (i = i - 1; i >= 0; i--)
	289	+ delete_ns2_led(&leds_data[i]);
	290	+
	291	+ kfree(leds_data);
	292	+
	293	+ return ret;
	294	+}
	295	+
	296	+static int __devexit ns2_led_remove(struct platform_device *pdev)
	297	+{
	298	+ int i;
	299	+ struct ns2_led_platform_data *pdata = pdev->dev.platform_data;
	300	+ struct ns2_led_data *leds_data;
	301	+
	302	+ leds_data = platform_get_drvdata(pdev);
	303	+
	304	+ for (i = 0; i < pdata->num_leds; i++)
	305	+ delete_ns2_led(&leds_data[i]);
	306	+
	307	+ kfree(leds_data);
	308	+ platform_set_drvdata(pdev, NULL);
	309	+
	310	+ return 0;
	311	+}
	312	+
	313	+static struct platform_driver ns2_led_driver = {
	314	+ .probe = ns2_led_probe,
	315	+ .remove = __devexit_p(ns2_led_remove),
	316	+ .driver = {
	317	+ .name = "leds-ns2",
	318	+ .owner = THIS_MODULE,
	319	+ },
	320	+};
	321	+MODULE_ALIAS("platform:leds-ns2");
	322	+
	323	+static int __init ns2_led_init(void)
	324	+{
	325	+ return platform_driver_register(&ns2_led_driver);
	326	+}
	327	+
	328	+static void __exit ns2_led_exit(void)
	329	+{
	330	+ platform_driver_unregister(&ns2_led_driver);
	331	+}
	332	+
	333	+module_init(ns2_led_init);
	334	+module_exit(ns2_led_exit);
	335	+
	336	+MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
	337	+MODULE_DESCRIPTION("Network Space v2 LED driver");
	338	+MODULE_LICENSE("GPL");