drivers/leds/leds-mc13783.c - kernel/msm-4.9 - Gitiles

 /*
  * 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 __devinit 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 __devinit 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 __devinit 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 = kcalloc(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");
 		goto err_free;
 	}

 	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);
 	}

 err_free:
 	kfree(led);
 	return ret;
 }

 static int __devexit 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);
 	kfree(led);
 	return 0;
 }

 static struct platform_driver mc13783_led_driver = {
 	.driver	= {
 		.name	= "mc13783-led",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= mc13783_led_probe,
 	.remove		= __devexit_p(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");
	/*
	* 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 __devinit 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 __devinit 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 __devinit 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 = kcalloc(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");
	goto err_free;
	}

	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);
	}

	err_free:
	kfree(led);
	return ret;
	}

	static int __devexit 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);
	kfree(led);
	return 0;
	}

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