[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / leds / leds-mc13783.c

/*
 * LEDs driver for Freescale MC13783
 *
 * Copyright (C) 2010 Philippe Rétornaz
 *
 * Based on leds-da903x:
 * Copyright (C) 2008 Compulab, Ltd.
 *      Mike Rapoport <mike@compulab.co.il>
 *
 * Copyright (C) 2006-2008 Marvell International Ltd.
 *      Eric Miao <eric.miao@marvell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/workqueue.h>
#include <linux/mfd/mc13xxx.h>
#include <linux/slab.h>

struct mc13783_led {
	struct led_classdev	cdev;
	struct work_struct	work;
	struct mc13xxx		*master;
	enum led_brightness	new_brightness;
	int			id;
};

#define MC13783_REG_LED_CONTROL_0	51
#define MC13783_LED_C0_ENABLE_BIT	(1 << 0)
#define MC13783_LED_C0_TRIODE_MD_BIT	(1 << 7)
#define MC13783_LED_C0_TRIODE_AD_BIT	(1 << 8)
#define MC13783_LED_C0_TRIODE_KP_BIT	(1 << 9)
#define MC13783_LED_C0_BOOST_BIT	(1 << 10)
#define MC13783_LED_C0_ABMODE_MASK	0x7
#define MC13783_LED_C0_ABMODE		11
#define MC13783_LED_C0_ABREF_MASK	0x3
#define MC13783_LED_C0_ABREF		14

#define MC13783_REG_LED_CONTROL_1	52
#define MC13783_LED_C1_TC1HALF_BIT	(1 << 18)

#define MC13783_REG_LED_CONTROL_2	53
#define MC13783_LED_C2_BL_P_MASK	0xf
#define MC13783_LED_C2_MD_P		9
#define MC13783_LED_C2_AD_P		13
#define MC13783_LED_C2_KP_P		17
#define MC13783_LED_C2_BL_C_MASK	0x7
#define MC13783_LED_C2_MD_C		0
#define MC13783_LED_C2_AD_C		3
#define MC13783_LED_C2_KP_C		6

#define MC13783_REG_LED_CONTROL_3	54
#define MC13783_LED_C3_TC_P		6
#define MC13783_LED_C3_TC_P_MASK	0x1f

#define MC13783_REG_LED_CONTROL_4	55
#define MC13783_REG_LED_CONTROL_5	56

#define MC13783_LED_Cx_PERIOD		21
#define MC13783_LED_Cx_PERIOD_MASK	0x3
#define MC13783_LED_Cx_SLEWLIM_BIT      (1 << 23)
#define MC13783_LED_Cx_TRIODE_TC_BIT	(1 << 23)
#define MC13783_LED_Cx_TC_C_MASK	0x3

static void mc13783_led_work(struct work_struct *work)
{
	struct mc13783_led *led = container_of(work, struct mc13783_led, work);
	int reg = 0;
	int mask = 0;
	int value = 0;
	int bank, off, shift;

	switch (led->id) {
	case MC13783_LED_MD:
		reg = MC13783_REG_LED_CONTROL_2;
		mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_MD_P;
		value = (led->new_brightness >> 4) << MC13783_LED_C2_MD_P;
		break;
	case MC13783_LED_AD:
		reg = MC13783_REG_LED_CONTROL_2;
		mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_AD_P;
		value = (led->new_brightness >> 4) << MC13783_LED_C2_AD_P;
		break;
	case MC13783_LED_KP:
		reg = MC13783_REG_LED_CONTROL_2;
		mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_KP_P;
		value = (led->new_brightness >> 4) << MC13783_LED_C2_KP_P;
		break;
	case MC13783_LED_R1:
	case MC13783_LED_G1:
	case MC13783_LED_B1:
	case MC13783_LED_R2:
	case MC13783_LED_G2:
	case MC13783_LED_B2:
	case MC13783_LED_R3:
	case MC13783_LED_G3:
	case MC13783_LED_B3:
		off = led->id - MC13783_LED_R1;
		bank = off/3;
		reg = MC13783_REG_LED_CONTROL_3 + off/3;
		shift = (off - bank * 3) * 5 + MC13783_LED_C3_TC_P;
		value = (led->new_brightness >> 3) << shift;
		mask = MC13783_LED_C3_TC_P_MASK << shift;
		break;
	}

	mc13xxx_lock(led->master);

	mc13xxx_reg_rmw(led->master, reg, mask, value);

	mc13xxx_unlock(led->master);
}

static void mc13783_led_set(struct led_classdev *led_cdev,
			   enum led_brightness value)
{
	struct mc13783_led *led;

	led = container_of(led_cdev, struct mc13783_led, cdev);
	led->new_brightness = value;
	schedule_work(&led->work);
}

static int mc13783_led_setup(struct mc13783_led *led, int max_current)
{
	int shift = 0;
	int mask = 0;
	int value = 0;
	int reg = 0;
	int ret, bank;

	switch (led->id) {
	case MC13783_LED_MD:
		shift = MC13783_LED_C2_MD_C;
		mask = MC13783_LED_C2_BL_C_MASK;
		value = max_current & MC13783_LED_C2_BL_C_MASK;
		reg = MC13783_REG_LED_CONTROL_2;
		break;
	case MC13783_LED_AD:
		shift = MC13783_LED_C2_AD_C;
		mask = MC13783_LED_C2_BL_C_MASK;
		value = max_current & MC13783_LED_C2_BL_C_MASK;
		reg = MC13783_REG_LED_CONTROL_2;
		break;
	case MC13783_LED_KP:
		shift = MC13783_LED_C2_KP_C;
		mask = MC13783_LED_C2_BL_C_MASK;
		value = max_current & MC13783_LED_C2_BL_C_MASK;
		reg = MC13783_REG_LED_CONTROL_2;
		break;
	case MC13783_LED_R1:
	case MC13783_LED_G1:
	case MC13783_LED_B1:
	case MC13783_LED_R2:
	case MC13783_LED_G2:
	case MC13783_LED_B2:
	case MC13783_LED_R3:
	case MC13783_LED_G3:
	case MC13783_LED_B3:
		bank = (led->id - MC13783_LED_R1)/3;
		reg = MC13783_REG_LED_CONTROL_3 + bank;
		shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
		mask = MC13783_LED_Cx_TC_C_MASK;
		value = max_current & MC13783_LED_Cx_TC_C_MASK;
		break;
	}

	mc13xxx_lock(led->master);

	ret = mc13xxx_reg_rmw(led->master, reg, mask << shift,
						value << shift);

	mc13xxx_unlock(led->master);
	return ret;
}

static int mc13783_leds_prepare(struct platform_device *pdev)
{
	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
	int ret = 0;
	int reg = 0;

	mc13xxx_lock(dev);

	if (pdata->flags & MC13783_LED_TC1HALF)
		reg |= MC13783_LED_C1_TC1HALF_BIT;

	if (pdata->flags & MC13783_LED_SLEWLIMTC)
		reg |= MC13783_LED_Cx_SLEWLIM_BIT;

	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, reg);
	if (ret)
		goto out;

	reg = (pdata->bl_period & MC13783_LED_Cx_PERIOD_MASK) <<
							MC13783_LED_Cx_PERIOD;

	if (pdata->flags & MC13783_LED_SLEWLIMBL)
		reg |= MC13783_LED_Cx_SLEWLIM_BIT;

	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg);
	if (ret)
		goto out;

	reg = (pdata->tc1_period & MC13783_LED_Cx_PERIOD_MASK) <<
							MC13783_LED_Cx_PERIOD;

	if (pdata->flags & MC13783_LED_TRIODE_TC1)
		reg |= MC13783_LED_Cx_TRIODE_TC_BIT;

	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, reg);
	if (ret)
		goto out;

	reg = (pdata->tc2_period & MC13783_LED_Cx_PERIOD_MASK) <<
							MC13783_LED_Cx_PERIOD;

	if (pdata->flags & MC13783_LED_TRIODE_TC2)
		reg |= MC13783_LED_Cx_TRIODE_TC_BIT;

	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, reg);
	if (ret)
		goto out;

	reg = (pdata->tc3_period & MC13783_LED_Cx_PERIOD_MASK) <<
							MC13783_LED_Cx_PERIOD;

	if (pdata->flags & MC13783_LED_TRIODE_TC3)
		reg |= MC13783_LED_Cx_TRIODE_TC_BIT;

	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, reg);
	if (ret)
		goto out;

	reg = MC13783_LED_C0_ENABLE_BIT;
	if (pdata->flags & MC13783_LED_TRIODE_MD)
		reg |= MC13783_LED_C0_TRIODE_MD_BIT;
	if (pdata->flags & MC13783_LED_TRIODE_AD)
		reg |= MC13783_LED_C0_TRIODE_AD_BIT;
	if (pdata->flags & MC13783_LED_TRIODE_KP)
		reg |= MC13783_LED_C0_TRIODE_KP_BIT;
	if (pdata->flags & MC13783_LED_BOOST_EN)
		reg |= MC13783_LED_C0_BOOST_BIT;

	reg |= (pdata->abmode & MC13783_LED_C0_ABMODE_MASK) <<
							MC13783_LED_C0_ABMODE;
	reg |= (pdata->abref & MC13783_LED_C0_ABREF_MASK) <<
							MC13783_LED_C0_ABREF;

	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, reg);

out:
	mc13xxx_unlock(dev);
	return ret;
}

static int mc13783_led_probe(struct platform_device *pdev)
{
	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct mc13xxx_led_platform_data *led_cur;
	struct mc13783_led *led, *led_dat;
	int ret, i;
	int init_led = 0;

	if (pdata == NULL) {
		dev_err(&pdev->dev, "missing platform data\n");
		return -ENODEV;
	}

	if (pdata->num_leds < 1 || pdata->num_leds > (MC13783_LED_MAX + 1)) {
		dev_err(&pdev->dev, "Invalid led count %d\n", pdata->num_leds);
		return -EINVAL;
	}

	led = devm_kzalloc(&pdev->dev, pdata->num_leds * sizeof(*led),
				GFP_KERNEL);
	if (led == NULL) {
		dev_err(&pdev->dev, "failed to alloc memory\n");
		return -ENOMEM;
	}

	ret = mc13783_leds_prepare(pdev);
	if (ret) {
		dev_err(&pdev->dev, "unable to init led driver\n");
		return ret;
	}

	for (i = 0; i < pdata->num_leds; i++) {
		led_dat = &led[i];
		led_cur = &pdata->led[i];

		if (led_cur->id > MC13783_LED_MAX || led_cur->id < 0) {
			dev_err(&pdev->dev, "invalid id %d\n", led_cur->id);
			ret = -EINVAL;
			goto err_register;
		}

		if (init_led & (1 << led_cur->id)) {
			dev_err(&pdev->dev, "led %d already initialized\n",
					led_cur->id);
			ret = -EINVAL;
			goto err_register;
		}

		init_led |= 1 << led_cur->id;
		led_dat->cdev.name = led_cur->name;
		led_dat->cdev.default_trigger = led_cur->default_trigger;
		led_dat->cdev.brightness_set = mc13783_led_set;
		led_dat->cdev.brightness = LED_OFF;
		led_dat->id = led_cur->id;
		led_dat->master = dev_get_drvdata(pdev->dev.parent);

		INIT_WORK(&led_dat->work, mc13783_led_work);

		ret = led_classdev_register(pdev->dev.parent, &led_dat->cdev);
		if (ret) {
			dev_err(&pdev->dev, "failed to register led %d\n",
					led_dat->id);
			goto err_register;
		}

		ret = mc13783_led_setup(led_dat, led_cur->max_current);
		if (ret) {
			dev_err(&pdev->dev, "unable to init led %d\n",
					led_dat->id);
			i++;
			goto err_register;
		}
	}

	platform_set_drvdata(pdev, led);
	return 0;

err_register:
	for (i = i - 1; i >= 0; i--) {
		led_classdev_unregister(&led[i].cdev);
		cancel_work_sync(&led[i].work);
	}

	return ret;
}

static int mc13783_led_remove(struct platform_device *pdev)
{
	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct mc13783_led *led = platform_get_drvdata(pdev);
	struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
	int i;

	for (i = 0; i < pdata->num_leds; i++) {
		led_classdev_unregister(&led[i].cdev);
		cancel_work_sync(&led[i].work);
	}

	mc13xxx_lock(dev);

	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, 0);
	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, 0);
	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, 0);
	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, 0);
	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, 0);
	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, 0);

	mc13xxx_unlock(dev);

	platform_set_drvdata(pdev, NULL);
	return 0;
}

static struct platform_driver mc13783_led_driver = {
	.driver	= {
		.name	= "mc13783-led",
		.owner	= THIS_MODULE,
	},
	.probe		= mc13783_led_probe,
	.remove		= mc13783_led_remove,
};

module_platform_driver(mc13783_led_driver);

MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC");
MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mc13783-led");
Commit	Line	Data
7fdcef8a PR	1	/*
	2	* LEDs driver for Freescale MC13783
	3	*
	4	* Copyright (C) 2010 Philippe Rétornaz
	5	*
	6	* Based on leds-da903x:
	7	* Copyright (C) 2008 Compulab, Ltd.
	8	* Mike Rapoport <mike@compulab.co.il>
	9	*
	10	* Copyright (C) 2006-2008 Marvell International Ltd.
	11	* Eric Miao <eric.miao@marvell.com>
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License version 2 as
	15	* published by the Free Software Foundation.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/kernel.h>
	20	#include <linux/init.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/leds.h>
	23	#include <linux/workqueue.h>
f3ca0782	24	#include <linux/mfd/mc13xxx.h>
7fdcef8a PR	25	#include <linux/slab.h>
	26
	27	struct mc13783_led {
	28	struct led_classdev cdev;
	29	struct work_struct work;
f3ca0782	30	struct mc13xxx *master;
7fdcef8a PR	31	enum led_brightness new_brightness;
	32	int id;
	33	};
	34
	35	#define MC13783_REG_LED_CONTROL_0 51
	36	#define MC13783_LED_C0_ENABLE_BIT (1 << 0)
	37	#define MC13783_LED_C0_TRIODE_MD_BIT (1 << 7)
	38	#define MC13783_LED_C0_TRIODE_AD_BIT (1 << 8)
	39	#define MC13783_LED_C0_TRIODE_KP_BIT (1 << 9)
	40	#define MC13783_LED_C0_BOOST_BIT (1 << 10)
	41	#define MC13783_LED_C0_ABMODE_MASK 0x7
	42	#define MC13783_LED_C0_ABMODE 11
	43	#define MC13783_LED_C0_ABREF_MASK 0x3
	44	#define MC13783_LED_C0_ABREF 14
	45
	46	#define MC13783_REG_LED_CONTROL_1 52
	47	#define MC13783_LED_C1_TC1HALF_BIT (1 << 18)
	48
	49	#define MC13783_REG_LED_CONTROL_2 53
	50	#define MC13783_LED_C2_BL_P_MASK 0xf
	51	#define MC13783_LED_C2_MD_P 9
	52	#define MC13783_LED_C2_AD_P 13
	53	#define MC13783_LED_C2_KP_P 17
	54	#define MC13783_LED_C2_BL_C_MASK 0x7
	55	#define MC13783_LED_C2_MD_C 0
	56	#define MC13783_LED_C2_AD_C 3
	57	#define MC13783_LED_C2_KP_C 6
	58
	59	#define MC13783_REG_LED_CONTROL_3 54
	60	#define MC13783_LED_C3_TC_P 6
	61	#define MC13783_LED_C3_TC_P_MASK 0x1f
	62
	63	#define MC13783_REG_LED_CONTROL_4 55
	64	#define MC13783_REG_LED_CONTROL_5 56
	65
	66	#define MC13783_LED_Cx_PERIOD 21
	67	#define MC13783_LED_Cx_PERIOD_MASK 0x3
	68	#define MC13783_LED_Cx_SLEWLIM_BIT (1 << 23)
	69	#define MC13783_LED_Cx_TRIODE_TC_BIT (1 << 23)
	70	#define MC13783_LED_Cx_TC_C_MASK 0x3
	71
	72	static void mc13783_led_work(struct work_struct *work)
	73	{
	74	struct mc13783_led *led = container_of(work, struct mc13783_led, work);
	75	int reg = 0;
	76	int mask = 0;
	77	int value = 0;
	78	int bank, off, shift;
	79
	80	switch (led->id) {
	81	case MC13783_LED_MD:
	82	reg = MC13783_REG_LED_CONTROL_2;
	83	mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_MD_P;
	84	value = (led->new_brightness >> 4) << MC13783_LED_C2_MD_P;
	85	break;
	86	case MC13783_LED_AD:
	87	reg = MC13783_REG_LED_CONTROL_2;
	88	mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_AD_P;
	89	value = (led->new_brightness >> 4) << MC13783_LED_C2_AD_P;
	90	break;
	91	case MC13783_LED_KP:
	92	reg = MC13783_REG_LED_CONTROL_2;
	93	mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_KP_P;
	94	value = (led->new_brightness >> 4) << MC13783_LED_C2_KP_P;
95	break;
96	case MC13783_LED_R1:
97	case MC13783_LED_G1:
98	case MC13783_LED_B1:
99	case MC13783_LED_R2:
100	case MC13783_LED_G2:
101	case MC13783_LED_B2:
102	case MC13783_LED_R3:
103	case MC13783_LED_G3:
104	case MC13783_LED_B3:
105	off = led->id - MC13783_LED_R1;
106	bank = off/3;
107	reg = MC13783_REG_LED_CONTROL_3 + off/3;
108	shift = (off - bank * 3) * 5 + MC13783_LED_C3_TC_P;
109	value = (led->new_brightness >> 3) << shift;
110	mask = MC13783_LED_C3_TC_P_MASK << shift;
111	break;
112	}
113
f3ca0782	114	mc13xxx_lock(led->master);
7fdcef8a	115
f3ca0782	116	mc13xxx_reg_rmw(led->master, reg, mask, value);
7fdcef8a	117
f3ca0782	118	mc13xxx_unlock(led->master);
7fdcef8a PR	119	}
	120
	121	static void mc13783_led_set(struct led_classdev *led_cdev,
	122	enum led_brightness value)
	123	{
	124	struct mc13783_led *led;
	125
	126	led = container_of(led_cdev, struct mc13783_led, cdev);
	127	led->new_brightness = value;
	128	schedule_work(&led->work);
	129	}
	130
98ea1ea2	131	static int mc13783_led_setup(struct mc13783_led *led, int max_current)
7fdcef8a PR	132	{
	133	int shift = 0;
	134	int mask = 0;
	135	int value = 0;
	136	int reg = 0;
	137	int ret, bank;
	138
	139	switch (led->id) {
	140	case MC13783_LED_MD:
	141	shift = MC13783_LED_C2_MD_C;
	142	mask = MC13783_LED_C2_BL_C_MASK;
	143	value = max_current & MC13783_LED_C2_BL_C_MASK;
	144	reg = MC13783_REG_LED_CONTROL_2;
	145	break;
	146	case MC13783_LED_AD:
	147	shift = MC13783_LED_C2_AD_C;
	148	mask = MC13783_LED_C2_BL_C_MASK;
	149	value = max_current & MC13783_LED_C2_BL_C_MASK;
	150	reg = MC13783_REG_LED_CONTROL_2;
	151	break;
	152	case MC13783_LED_KP:
	153	shift = MC13783_LED_C2_KP_C;
	154	mask = MC13783_LED_C2_BL_C_MASK;
	155	value = max_current & MC13783_LED_C2_BL_C_MASK;
	156	reg = MC13783_REG_LED_CONTROL_2;
	157	break;
	158	case MC13783_LED_R1:
	159	case MC13783_LED_G1:
	160	case MC13783_LED_B1:
	161	case MC13783_LED_R2:
	162	case MC13783_LED_G2:
	163	case MC13783_LED_B2:
	164	case MC13783_LED_R3:
	165	case MC13783_LED_G3:
	166	case MC13783_LED_B3:
	167	bank = (led->id - MC13783_LED_R1)/3;
	168	reg = MC13783_REG_LED_CONTROL_3 + bank;
	169	shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
	170	mask = MC13783_LED_Cx_TC_C_MASK;
	171	value = max_current & MC13783_LED_Cx_TC_C_MASK;
	172	break;
	173	}
	174
f3ca0782	175	mc13xxx_lock(led->master);
7fdcef8a	176
f3ca0782	177	ret = mc13xxx_reg_rmw(led->master, reg, mask << shift,
7fdcef8a PR	178	value << shift);
7fdcef8a PR	179
f3ca0782	180	mc13xxx_unlock(led->master);
7fdcef8a PR	181	return ret;
	182	}
	183
98ea1ea2	184	static int mc13783_leds_prepare(struct platform_device *pdev)
7fdcef8a	185	{
52b7ad3a	186	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
f3ca0782	187	struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
7fdcef8a PR	188	int ret = 0;
	189	int reg = 0;
	190
f3ca0782	191	mc13xxx_lock(dev);
7fdcef8a PR	192
	193	if (pdata->flags & MC13783_LED_TC1HALF)
	194	reg \|= MC13783_LED_C1_TC1HALF_BIT;
	195
	196	if (pdata->flags & MC13783_LED_SLEWLIMTC)
	197	reg \|= MC13783_LED_Cx_SLEWLIM_BIT;
	198
f3ca0782	199	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, reg);
7fdcef8a PR	200	if (ret)
	201	goto out;
	202
	203	reg = (pdata->bl_period & MC13783_LED_Cx_PERIOD_MASK) <<
	204	MC13783_LED_Cx_PERIOD;
	205
	206	if (pdata->flags & MC13783_LED_SLEWLIMBL)
	207	reg \|= MC13783_LED_Cx_SLEWLIM_BIT;
	208
f3ca0782	209	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg);
7fdcef8a PR	210	if (ret)
	211	goto out;
	212
	213	reg = (pdata->tc1_period & MC13783_LED_Cx_PERIOD_MASK) <<
	214	MC13783_LED_Cx_PERIOD;
	215
	216	if (pdata->flags & MC13783_LED_TRIODE_TC1)
	217	reg \|= MC13783_LED_Cx_TRIODE_TC_BIT;
	218
f3ca0782	219	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, reg);
7fdcef8a PR	220	if (ret)
	221	goto out;
	222
	223	reg = (pdata->tc2_period & MC13783_LED_Cx_PERIOD_MASK) <<
	224	MC13783_LED_Cx_PERIOD;
	225
	226	if (pdata->flags & MC13783_LED_TRIODE_TC2)
	227	reg \|= MC13783_LED_Cx_TRIODE_TC_BIT;
	228
f3ca0782	229	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, reg);
7fdcef8a PR	230	if (ret)
	231	goto out;
	232
	233	reg = (pdata->tc3_period & MC13783_LED_Cx_PERIOD_MASK) <<
	234	MC13783_LED_Cx_PERIOD;
	235
	236	if (pdata->flags & MC13783_LED_TRIODE_TC3)
6eab04a8	237	reg \|= MC13783_LED_Cx_TRIODE_TC_BIT;
7fdcef8a	238
f3ca0782	239	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, reg);
7fdcef8a PR	240	if (ret)
	241	goto out;
	242
	243	reg = MC13783_LED_C0_ENABLE_BIT;
	244	if (pdata->flags & MC13783_LED_TRIODE_MD)
	245	reg \|= MC13783_LED_C0_TRIODE_MD_BIT;
	246	if (pdata->flags & MC13783_LED_TRIODE_AD)
	247	reg \|= MC13783_LED_C0_TRIODE_AD_BIT;
	248	if (pdata->flags & MC13783_LED_TRIODE_KP)
	249	reg \|= MC13783_LED_C0_TRIODE_KP_BIT;
	250	if (pdata->flags & MC13783_LED_BOOST_EN)
	251	reg \|= MC13783_LED_C0_BOOST_BIT;
	252
	253	reg \|= (pdata->abmode & MC13783_LED_C0_ABMODE_MASK) <<
	254	MC13783_LED_C0_ABMODE;
	255	reg \|= (pdata->abref & MC13783_LED_C0_ABREF_MASK) <<
	256	MC13783_LED_C0_ABREF;
	257
f3ca0782	258	ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, reg);
7fdcef8a PR	259
7fdcef8a PR	260	out:
f3ca0782	261	mc13xxx_unlock(dev);
7fdcef8a PR	262	return ret;
	263	}
	264
98ea1ea2	265	static int mc13783_led_probe(struct platform_device *pdev)
7fdcef8a	266	{
52b7ad3a SO	267	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
52b7ad3a SO	268	struct mc13xxx_led_platform_data *led_cur;
7fdcef8a PR	269	struct mc13783_led led, led_dat;
	270	int ret, i;
	271	int init_led = 0;
	272
	273	if (pdata == NULL) {
	274	dev_err(&pdev->dev, "missing platform data\n");
	275	return -ENODEV;
	276	}
	277
3b080945	278	if (pdata->num_leds < 1 \|\| pdata->num_leds > (MC13783_LED_MAX + 1)) {
7fdcef8a PR	279	dev_err(&pdev->dev, "Invalid led count %d\n", pdata->num_leds);
	280	return -EINVAL;
	281	}
	282
a44cdd2c BW	283	led = devm_kzalloc(&pdev->dev, pdata->num_leds * sizeof(*led),
a44cdd2c BW	284	GFP_KERNEL);
7fdcef8a PR	285	if (led == NULL) {
	286	dev_err(&pdev->dev, "failed to alloc memory\n");
	287	return -ENOMEM;
	288	}
	289
	290	ret = mc13783_leds_prepare(pdev);
	291	if (ret) {
	292	dev_err(&pdev->dev, "unable to init led driver\n");
a44cdd2c	293	return ret;
7fdcef8a PR	294	}
	295
	296	for (i = 0; i < pdata->num_leds; i++) {
	297	led_dat = &led[i];
	298	led_cur = &pdata->led[i];
	299
	300	if (led_cur->id > MC13783_LED_MAX \|\| led_cur->id < 0) {
	301	dev_err(&pdev->dev, "invalid id %d\n", led_cur->id);
	302	ret = -EINVAL;
	303	goto err_register;
	304	}
	305
	306	if (init_led & (1 << led_cur->id)) {
	307	dev_err(&pdev->dev, "led %d already initialized\n",
	308	led_cur->id);
	309	ret = -EINVAL;
	310	goto err_register;
	311	}
	312
	313	init_led \|= 1 << led_cur->id;
	314	led_dat->cdev.name = led_cur->name;
	315	led_dat->cdev.default_trigger = led_cur->default_trigger;
	316	led_dat->cdev.brightness_set = mc13783_led_set;
	317	led_dat->cdev.brightness = LED_OFF;
	318	led_dat->id = led_cur->id;
	319	led_dat->master = dev_get_drvdata(pdev->dev.parent);
	320
	321	INIT_WORK(&led_dat->work, mc13783_led_work);
	322
	323	ret = led_classdev_register(pdev->dev.parent, &led_dat->cdev);
	324	if (ret) {
	325	dev_err(&pdev->dev, "failed to register led %d\n",
	326	led_dat->id);
	327	goto err_register;
	328	}
	329
	330	ret = mc13783_led_setup(led_dat, led_cur->max_current);
	331	if (ret) {
	332	dev_err(&pdev->dev, "unable to init led %d\n",
	333	led_dat->id);
	334	i++;
	335	goto err_register;
	336	}
	337	}
	338
	339	platform_set_drvdata(pdev, led);
	340	return 0;
	341
	342	err_register:
	343	for (i = i - 1; i >= 0; i--) {
	344	led_classdev_unregister(&led[i].cdev);
	345	cancel_work_sync(&led[i].work);
	346	}
	347
7fdcef8a PR	348	return ret;
	349	}
	350
678e8a6b	351	static int mc13783_led_remove(struct platform_device *pdev)
7fdcef8a	352	{
52b7ad3a	353	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
7fdcef8a	354	struct mc13783_led *led = platform_get_drvdata(pdev);
f3ca0782	355	struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
7fdcef8a PR	356	int i;
	357
	358	for (i = 0; i < pdata->num_leds; i++) {
	359	led_classdev_unregister(&led[i].cdev);
	360	cancel_work_sync(&led[i].work);
	361	}
	362
f3ca0782	363	mc13xxx_lock(dev);
7fdcef8a	364
f3ca0782 DJ	365	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, 0);
	366	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, 0);
	367	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, 0);
	368	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, 0);
	369	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, 0);
	370	mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, 0);
7fdcef8a	371
f3ca0782	372	mc13xxx_unlock(dev);
7fdcef8a	373
317dfb14	374	platform_set_drvdata(pdev, NULL);
7fdcef8a PR	375	return 0;
	376	}
	377
	378	static struct platform_driver mc13783_led_driver = {
	379	.driver = {
	380	.name = "mc13783-led",
	381	.owner = THIS_MODULE,
	382	},
	383	.probe = mc13783_led_probe,
df07cf81	384	.remove = mc13783_led_remove,
7fdcef8a PR	385	};
7fdcef8a PR	386
892a8843	387	module_platform_driver(mc13783_led_driver);
7fdcef8a PR	388
	389	MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC");
	390	MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
	391	MODULE_LICENSE("GPL");
	392	MODULE_ALIAS("platform:mc13783-led");