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leds: Add mc13783 LED support

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This add basic led support for Freescale MC13783 PMIC.

Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Philippe Rétornaz 2010-05-19 09:24:31 +02:00 committed by Richard Purdie
parent 1e653accf7
commit 7fdcef8a41
5 changed files with 481 additions and 0 deletions
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7
drivers/leds/Kconfig
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@ -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

1
drivers/leds/Makefile
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@ -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

403
drivers/leds/leds-mc13783.c Normal file
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@ -0,0 +1,403 @@
/*
* 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");

4
drivers/mfd/mc13783-core.c
View File

@ -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;
}

66
include/linux/mfd/mc13783.h
View File

@ -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;
};