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Commit 7fdcef8a authored by Philippe Rétornaz's avatar Philippe Rétornaz Committed by Richard Purdie
Browse files

leds: Add mc13783 LED support 



This add basic led support for Freescale MC13783 PMIC.

Signed-off-by: default avatarPhilippe Rétornaz <philippe.retornaz@epfl.ch>
Signed-off-by: default avatarRichard Purdie <rpurdie@linux.intel.com>
parent 1e653acc

drivers/leds/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -295,6 +295,13 @@ config LEDS_DELL_NETBOOKS 
	  This adds support for the Latitude 2100 and similar

	  notebooks that have an external LED.



config LEDS_MC13783

	tristate "LED Support for MC13783 PMIC"

	depends on MFD_MC13783

	help

	  This option enable support for on-chip LED drivers found

	  on Freescale Semiconductor MC13783 PMIC.



config LEDS_TRIGGERS

	bool "LED Trigger support"

	help

drivers/leds/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o 
obj-$(CONFIG_LEDS_LT3593)		+= leds-lt3593.o

obj-$(CONFIG_LEDS_ADP5520)		+= leds-adp5520.o

obj-$(CONFIG_LEDS_DELL_NETBOOKS)	+= dell-led.o

obj-$(CONFIG_LEDS_MC13783)		+= leds-mc13783.o



# LED SPI Drivers

obj-$(CONFIG_LEDS_DAC124S085)		+= leds-dac124s085.o

drivers/leds/leds-mc13783.c

0 → 100644
+403 −0
Original line number Diff line number Diff line 
/*

 * 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/mc13783.h>

#include <linux/slab.h>



struct mc13783_led {

	struct led_classdev	cdev;

	struct work_struct	work;

	struct mc13783		*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;

	}



	mc13783_lock(led->master);



	mc13783_reg_rmw(led->master, reg, mask, value);



	mc13783_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;

	}



	mc13783_lock(led->master);



	ret = mc13783_reg_rmw(led->master, reg, mask << shift,

						value << shift);



	mc13783_unlock(led->master);

	return ret;

}



static int __devinit mc13783_leds_prepare(struct platform_device *pdev)

{

	struct mc13783_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);

	struct mc13783 *dev = dev_get_drvdata(pdev->dev.parent);

	int ret = 0;

	int reg = 0;



	mc13783_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 = mc13783_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 = mc13783_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 = mc13783_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 = mc13783_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 = mc13783_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 = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_0, reg);



out:

	mc13783_unlock(dev);

	return ret;

}



static int __devinit mc13783_led_probe(struct platform_device *pdev)

{

	struct mc13783_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);

	struct mc13783_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) {

		dev_err(&pdev->dev, "Invalid led count %d\n", pdata->num_leds);

		return -EINVAL;

	}



	led = kzalloc(sizeof(*led) * pdata->num_leds, 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 mc13783_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);

	struct mc13783_led *led = platform_get_drvdata(pdev);

	struct mc13783 *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);

	}



	mc13783_lock(dev);



	mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_0, 0);

	mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_1, 0);

	mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_2, 0);

	mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_3, 0);

	mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_4, 0);

	mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_5, 0);



	mc13783_unlock(dev);



	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),

};



static int __init mc13783_led_init(void)

{

	return platform_driver_register(&mc13783_led_driver);

}

module_init(mc13783_led_init);



static void __exit mc13783_led_exit(void)

{

	platform_driver_unregister(&mc13783_led_driver);

}

module_exit(mc13783_led_exit);



MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC");

MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:mc13783-led");

drivers/mfd/mc13783-core.c

+4 −0
Original line number Diff line number Diff line
@@ -679,6 +679,10 @@ static int mc13783_probe(struct spi_device *spi) 
	if (pdata->flags & MC13783_USE_TOUCHSCREEN)

		mc13783_add_subdevice(mc13783, "mc13783-ts");



	if (pdata->flags & MC13783_USE_LED)

		mc13783_add_subdevice_pdata(mc13783, "mc13783-led",

					pdata->leds, sizeof(*pdata->leds));



	return 0;

}

include/linux/mfd/mc13783.h

+66 −0
Original line number Diff line number Diff line
@@ -64,6 +64,70 @@ static inline int mc13783_ackirq(struct mc13783 *mc13783, int irq) 
					MC13783_ADC0_TSMOD1 | \

					MC13783_ADC0_TSMOD2)



struct mc13783_led_platform_data {

#define MC13783_LED_MD		0

#define MC13783_LED_AD		1

#define MC13783_LED_KP		2

#define MC13783_LED_R1		3

#define MC13783_LED_G1		4

#define MC13783_LED_B1		5

#define MC13783_LED_R2		6

#define MC13783_LED_G2		7

#define MC13783_LED_B2		8

#define MC13783_LED_R3		9

#define MC13783_LED_G3		10

#define MC13783_LED_B3		11

#define MC13783_LED_MAX MC13783_LED_B3

	int id;

	const char *name;

	const char *default_trigger;



/* Three or two bits current selection depending on the led */

	char max_current;

};



struct mc13783_leds_platform_data {

	int num_leds;

	struct mc13783_led_platform_data *led;



#define MC13783_LED_TRIODE_MD	(1 << 0)

#define MC13783_LED_TRIODE_AD	(1 << 1)

#define MC13783_LED_TRIODE_KP	(1 << 2)

#define MC13783_LED_BOOST_EN	(1 << 3)

#define MC13783_LED_TC1HALF	(1 << 4)

#define MC13783_LED_SLEWLIMTC	(1 << 5)

#define MC13783_LED_SLEWLIMBL	(1 << 6)

#define MC13783_LED_TRIODE_TC1	(1 << 7)

#define MC13783_LED_TRIODE_TC2	(1 << 8)

#define MC13783_LED_TRIODE_TC3	(1 << 9)

	int flags;



#define MC13783_LED_AB_DISABLED		0

#define MC13783_LED_AB_MD1		1

#define MC13783_LED_AB_MD12		2

#define MC13783_LED_AB_MD123		3

#define MC13783_LED_AB_MD1234		4

#define MC13783_LED_AB_MD1234_AD1	5

#define MC13783_LED_AB_MD1234_AD12	6

#define MC13783_LED_AB_MD1_AD		7

	char abmode;



#define MC13783_LED_ABREF_200MV	0

#define MC13783_LED_ABREF_400MV	1

#define MC13783_LED_ABREF_600MV	2

#define MC13783_LED_ABREF_800MV	3

	char abref;



#define MC13783_LED_PERIOD_10MS		0

#define MC13783_LED_PERIOD_100MS	1

#define MC13783_LED_PERIOD_500MS	2

#define MC13783_LED_PERIOD_2S		3

	char bl_period;

	char tc1_period;

	char tc2_period;

	char tc3_period;

};



/* to be cleaned up */

struct regulator_init_data;
@@ -80,12 +144,14 @@ struct mc13783_regulator_platform_data { 
struct mc13783_platform_data {

	int num_regulators;

	struct mc13783_regulator_init_data *regulators;

	struct mc13783_leds_platform_data *leds;



#define MC13783_USE_TOUCHSCREEN (1 << 0)

#define MC13783_USE_CODEC	(1 << 1)

#define MC13783_USE_ADC		(1 << 2)

#define MC13783_USE_RTC		(1 << 3)

#define MC13783_USE_REGULATOR	(1 << 4)

#define MC13783_USE_LED		(1 << 5)

	unsigned int flags;

};