leds: driver for DA9052/53 PMIC v2
LED Driver for Dialog Semiconductor DA9052/53 PMICs. [akpm@linux-foundation.org: make led_reg static] Signed-off-by: David Dajun Chen <dchen@diasemi.com> Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Bryan Wu <bryan.wu@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Родитель
5bc9ad774c
Коммит
5ba736311b
|
@ -259,6 +259,14 @@ config LEDS_DA903X
|
|||
This option enables support for on-chip LED drivers found
|
||||
on Dialog Semiconductor DA9030/DA9034 PMICs.
|
||||
|
||||
config LEDS_DA9052
|
||||
tristate "Dialog DA9052/DA9053 LEDS"
|
||||
depends on LEDS_CLASS
|
||||
depends on PMIC_DA9052
|
||||
help
|
||||
This option enables support for on-chip LED drivers found
|
||||
on Dialog Semiconductor DA9052-BC and DA9053-AA/Bx PMICs.
|
||||
|
||||
config LEDS_DAC124S085
|
||||
tristate "LED Support for DAC124S085 SPI DAC"
|
||||
depends on LEDS_CLASS
|
||||
|
|
|
@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
|
|||
obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
|
||||
obj-$(CONFIG_LEDS_PCA9633) += leds-pca9633.o
|
||||
obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
|
||||
obj-$(CONFIG_LEDS_DA9052) += leds-da9052.o
|
||||
obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
|
||||
obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
|
||||
obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
|
||||
|
|
|
@ -0,0 +1,214 @@
|
|||
/*
|
||||
* LED Driver for Dialog DA9052 PMICs.
|
||||
*
|
||||
* Copyright(c) 2012 Dialog Semiconductor Ltd.
|
||||
*
|
||||
* Author: David Dajun Chen <dchen@diasemi.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.
|
||||
*
|
||||
*/
|
||||
|
||||
#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/slab.h>
|
||||
|
||||
#include <linux/mfd/da9052/reg.h>
|
||||
#include <linux/mfd/da9052/da9052.h>
|
||||
#include <linux/mfd/da9052/pdata.h>
|
||||
|
||||
#define DA9052_OPENDRAIN_OUTPUT 2
|
||||
#define DA9052_SET_HIGH_LVL_OUTPUT (1 << 3)
|
||||
#define DA9052_MASK_UPPER_NIBBLE 0xF0
|
||||
#define DA9052_MASK_LOWER_NIBBLE 0x0F
|
||||
#define DA9052_NIBBLE_SHIFT 4
|
||||
#define DA9052_MAX_BRIGHTNESS 0x5f
|
||||
|
||||
struct da9052_led {
|
||||
struct led_classdev cdev;
|
||||
struct work_struct work;
|
||||
struct da9052 *da9052;
|
||||
unsigned char led_index;
|
||||
unsigned char id;
|
||||
int brightness;
|
||||
};
|
||||
|
||||
static unsigned char led_reg[] = {
|
||||
DA9052_LED_CONT_4_REG,
|
||||
DA9052_LED_CONT_5_REG,
|
||||
};
|
||||
|
||||
static int da9052_set_led_brightness(struct da9052_led *led)
|
||||
{
|
||||
u8 val;
|
||||
int error;
|
||||
|
||||
val = (led->brightness & 0x7f) | DA9052_LED_CONT_DIM;
|
||||
|
||||
error = da9052_reg_write(led->da9052, led_reg[led->led_index], val);
|
||||
if (error < 0)
|
||||
dev_err(led->da9052->dev, "Failed to set led brightness, %d\n",
|
||||
error);
|
||||
return error;
|
||||
}
|
||||
|
||||
static void da9052_led_work(struct work_struct *work)
|
||||
{
|
||||
struct da9052_led *led = container_of(work, struct da9052_led, work);
|
||||
|
||||
da9052_set_led_brightness(led);
|
||||
}
|
||||
|
||||
static void da9052_led_set(struct led_classdev *led_cdev,
|
||||
enum led_brightness value)
|
||||
{
|
||||
struct da9052_led *led;
|
||||
|
||||
led = container_of(led_cdev, struct da9052_led, cdev);
|
||||
led->brightness = value;
|
||||
schedule_work(&led->work);
|
||||
}
|
||||
|
||||
static int da9052_configure_leds(struct da9052 *da9052)
|
||||
{
|
||||
int error;
|
||||
unsigned char register_value = DA9052_OPENDRAIN_OUTPUT
|
||||
| DA9052_SET_HIGH_LVL_OUTPUT;
|
||||
|
||||
error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
|
||||
DA9052_MASK_LOWER_NIBBLE,
|
||||
register_value);
|
||||
|
||||
if (error < 0) {
|
||||
dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
|
||||
error);
|
||||
return error;
|
||||
}
|
||||
|
||||
error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
|
||||
DA9052_MASK_UPPER_NIBBLE,
|
||||
register_value << DA9052_NIBBLE_SHIFT);
|
||||
if (error < 0)
|
||||
dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
|
||||
error);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
static int __devinit da9052_led_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct da9052_pdata *pdata;
|
||||
struct da9052 *da9052;
|
||||
struct led_platform_data *pled;
|
||||
struct da9052_led *led = NULL;
|
||||
int error = -ENODEV;
|
||||
int i;
|
||||
|
||||
da9052 = dev_get_drvdata(pdev->dev.parent);
|
||||
pdata = da9052->dev->platform_data;
|
||||
if (pdata == NULL) {
|
||||
dev_err(&pdev->dev, "No platform data\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
pled = pdata->pled;
|
||||
if (pled == NULL) {
|
||||
dev_err(&pdev->dev, "No platform data for LED\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
led = devm_kzalloc(&pdev->dev,
|
||||
sizeof(struct da9052_led) * pled->num_leds,
|
||||
GFP_KERNEL);
|
||||
if (led == NULL) {
|
||||
dev_err(&pdev->dev, "Failed to alloc memory\n");
|
||||
error = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
for (i = 0; i < pled->num_leds; i++) {
|
||||
led[i].cdev.name = pled->leds[i].name;
|
||||
led[i].cdev.brightness_set = da9052_led_set;
|
||||
led[i].cdev.brightness = LED_OFF;
|
||||
led[i].cdev.max_brightness = DA9052_MAX_BRIGHTNESS;
|
||||
led[i].brightness = LED_OFF;
|
||||
led[i].led_index = pled->leds[i].flags;
|
||||
led[i].da9052 = dev_get_drvdata(pdev->dev.parent);
|
||||
INIT_WORK(&led[i].work, da9052_led_work);
|
||||
|
||||
error = led_classdev_register(pdev->dev.parent, &led[i].cdev);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev, "Failed to register led %d\n",
|
||||
led[i].led_index);
|
||||
goto err_register;
|
||||
}
|
||||
|
||||
error = da9052_set_led_brightness(&led[i]);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev, "Unable to init led %d\n",
|
||||
led[i].led_index);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
error = da9052_configure_leds(led->da9052);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev, "Failed to configure GPIO LED%d\n", error);
|
||||
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:
|
||||
return error;
|
||||
}
|
||||
|
||||
static int __devexit da9052_led_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct da9052_led *led = platform_get_drvdata(pdev);
|
||||
struct da9052_pdata *pdata;
|
||||
struct da9052 *da9052;
|
||||
struct led_platform_data *pled;
|
||||
int i;
|
||||
|
||||
da9052 = dev_get_drvdata(pdev->dev.parent);
|
||||
pdata = da9052->dev->platform_data;
|
||||
pled = pdata->pled;
|
||||
|
||||
for (i = 0; i < pled->num_leds; i++) {
|
||||
led[i].brightness = 0;
|
||||
da9052_set_led_brightness(&led[i]);
|
||||
led_classdev_unregister(&led[i].cdev);
|
||||
cancel_work_sync(&led[i].work);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver da9052_led_driver = {
|
||||
.driver = {
|
||||
.name = "da9052-leds",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = da9052_led_probe,
|
||||
.remove = __devexit_p(da9052_led_remove),
|
||||
};
|
||||
|
||||
module_platform_driver(da9052_led_driver);
|
||||
|
||||
MODULE_AUTHOR("Dialog Semiconductor Ltd <dchen@diasemi.com>");
|
||||
MODULE_DESCRIPTION("LED driver for Dialog DA9052 PMIC");
|
||||
MODULE_LICENSE("GPL");
|
Загрузка…
Ссылка в новой задаче