backlight: new driver for ADP5520/ADP5501 MFD PMICs
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Michael Hennerich
Richard Purdie
parent
89dfc28ccb
commit
a7998cecf5
@ -251,3 +251,14 @@ config BACKLIGHT_ADX
|
||||
help
|
||||
Say Y to enable the backlight driver on Avionic Design Xanthos-based
|
||||
boards.
|
||||
|
||||
config BACKLIGHT_ADP5520
|
||||
tristate "Backlight Driver for ADP5520/ADP5501 using WLED"
|
||||
depends on BACKLIGHT_CLASS_DEVICE && PMIC_ADP5520
|
||||
help
|
||||
If you have a LCD backlight connected to the BST/BL_SNK output of
|
||||
ADP5520 or ADP5501, say Y here to enable this driver.
|
||||
|
||||
To compile this driver as a module, choose M here: the module will
|
||||
be called adp5520_bl.
|
||||
|
||||
|
||||
@ -27,3 +27,5 @@ obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o
|
||||
obj-$(CONFIG_BACKLIGHT_SAHARA) += kb3886_bl.o
|
||||
obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o
|
||||
obj-$(CONFIG_BACKLIGHT_ADX) += adx_bl.o
|
||||
obj-$(CONFIG_BACKLIGHT_ADP5520) += adp5520_bl.o
|
||||
|
||||
|
||||
377
drivers/video/backlight/adp5520_bl.c
Normal file
377
drivers/video/backlight/adp5520_bl.c
Normal file
@ -0,0 +1,377 @@
|
||||
/*
|
||||
* Backlight driver for Analog Devices ADP5520/ADP5501 MFD PMICs
|
||||
*
|
||||
* Copyright 2009 Analog Devices Inc.
|
||||
*
|
||||
* Licensed under the GPL-2 or later.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/fb.h>
|
||||
#include <linux/backlight.h>
|
||||
#include <linux/mfd/adp5520.h>
|
||||
|
||||
struct adp5520_bl {
|
||||
struct device *master;
|
||||
struct adp5520_backlight_platfrom_data *pdata;
|
||||
struct mutex lock;
|
||||
unsigned long cached_daylight_max;
|
||||
int id;
|
||||
int current_brightness;
|
||||
};
|
||||
|
||||
static int adp5520_bl_set(struct backlight_device *bl, int brightness)
|
||||
{
|
||||
struct adp5520_bl *data = bl_get_data(bl);
|
||||
struct device *master = data->master;
|
||||
int ret = 0;
|
||||
|
||||
if (data->pdata->en_ambl_sens) {
|
||||
if ((brightness > 0) && (brightness < ADP5020_MAX_BRIGHTNESS)) {
|
||||
/* Disable Ambient Light auto adjust */
|
||||
ret |= adp5520_clr_bits(master, BL_CONTROL,
|
||||
BL_AUTO_ADJ);
|
||||
ret |= adp5520_write(master, DAYLIGHT_MAX, brightness);
|
||||
} else {
|
||||
/*
|
||||
* MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
|
||||
* restore daylight l3 sysfs brightness
|
||||
*/
|
||||
ret |= adp5520_write(master, DAYLIGHT_MAX,
|
||||
data->cached_daylight_max);
|
||||
ret |= adp5520_set_bits(master, BL_CONTROL,
|
||||
BL_AUTO_ADJ);
|
||||
}
|
||||
} else {
|
||||
ret |= adp5520_write(master, DAYLIGHT_MAX, brightness);
|
||||
}
|
||||
|
||||
if (data->current_brightness && brightness == 0)
|
||||
ret |= adp5520_set_bits(master,
|
||||
MODE_STATUS, DIM_EN);
|
||||
else if (data->current_brightness == 0 && brightness)
|
||||
ret |= adp5520_clr_bits(master,
|
||||
MODE_STATUS, DIM_EN);
|
||||
|
||||
if (!ret)
|
||||
data->current_brightness = brightness;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int adp5520_bl_update_status(struct backlight_device *bl)
|
||||
{
|
||||
int brightness = bl->props.brightness;
|
||||
if (bl->props.power != FB_BLANK_UNBLANK)
|
||||
brightness = 0;
|
||||
|
||||
if (bl->props.fb_blank != FB_BLANK_UNBLANK)
|
||||
brightness = 0;
|
||||
|
||||
return adp5520_bl_set(bl, brightness);
|
||||
}
|
||||
|
||||
static int adp5520_bl_get_brightness(struct backlight_device *bl)
|
||||
{
|
||||
struct adp5520_bl *data = bl_get_data(bl);
|
||||
int error;
|
||||
uint8_t reg_val;
|
||||
|
||||
error = adp5520_read(data->master, BL_VALUE, ®_val);
|
||||
|
||||
return error ? data->current_brightness : reg_val;
|
||||
}
|
||||
|
||||
static struct backlight_ops adp5520_bl_ops = {
|
||||
.update_status = adp5520_bl_update_status,
|
||||
.get_brightness = adp5520_bl_get_brightness,
|
||||
};
|
||||
|
||||
static int adp5520_bl_setup(struct backlight_device *bl)
|
||||
{
|
||||
struct adp5520_bl *data = bl_get_data(bl);
|
||||
struct device *master = data->master;
|
||||
struct adp5520_backlight_platfrom_data *pdata = data->pdata;
|
||||
int ret = 0;
|
||||
|
||||
ret |= adp5520_write(master, DAYLIGHT_MAX, pdata->l1_daylight_max);
|
||||
ret |= adp5520_write(master, DAYLIGHT_DIM, pdata->l1_daylight_dim);
|
||||
|
||||
if (pdata->en_ambl_sens) {
|
||||
data->cached_daylight_max = pdata->l1_daylight_max;
|
||||
ret |= adp5520_write(master, OFFICE_MAX, pdata->l2_office_max);
|
||||
ret |= adp5520_write(master, OFFICE_DIM, pdata->l2_office_dim);
|
||||
ret |= adp5520_write(master, DARK_MAX, pdata->l3_dark_max);
|
||||
ret |= adp5520_write(master, DARK_DIM, pdata->l3_dark_dim);
|
||||
ret |= adp5520_write(master, L2_TRIP, pdata->l2_trip);
|
||||
ret |= adp5520_write(master, L2_HYS, pdata->l2_hyst);
|
||||
ret |= adp5520_write(master, L3_TRIP, pdata->l3_trip);
|
||||
ret |= adp5520_write(master, L3_HYS, pdata->l3_hyst);
|
||||
ret |= adp5520_write(master, ALS_CMPR_CFG,
|
||||
ALS_CMPR_CFG_VAL(pdata->abml_filt, L3_EN));
|
||||
}
|
||||
|
||||
ret |= adp5520_write(master, BL_CONTROL,
|
||||
BL_CTRL_VAL(pdata->fade_led_law, pdata->en_ambl_sens));
|
||||
|
||||
ret |= adp5520_write(master, BL_FADE, FADE_VAL(pdata->fade_in,
|
||||
pdata->fade_out));
|
||||
|
||||
ret |= adp5520_set_bits(master, MODE_STATUS, BL_EN | DIM_EN);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t adp5520_show(struct device *dev, char *buf, int reg)
|
||||
{
|
||||
struct adp5520_bl *data = dev_get_drvdata(dev);
|
||||
int error;
|
||||
uint8_t reg_val;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
error = adp5520_read(data->master, reg, ®_val);
|
||||
mutex_unlock(&data->lock);
|
||||
|
||||
return sprintf(buf, "%u\n", reg_val);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_store(struct device *dev, const char *buf,
|
||||
size_t count, int reg)
|
||||
{
|
||||
struct adp5520_bl *data = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
int ret;
|
||||
|
||||
ret = strict_strtoul(buf, 10, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
adp5520_write(data->master, reg, val);
|
||||
mutex_unlock(&data->lock);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_dark_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp5520_show(dev, buf, DARK_MAX);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_dark_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
return adp5520_store(dev, buf, count, DARK_MAX);
|
||||
}
|
||||
static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
|
||||
adp5520_bl_dark_max_store);
|
||||
|
||||
static ssize_t adp5520_bl_office_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp5520_show(dev, buf, OFFICE_MAX);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_office_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
return adp5520_store(dev, buf, count, OFFICE_MAX);
|
||||
}
|
||||
static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
|
||||
adp5520_bl_office_max_store);
|
||||
|
||||
static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp5520_show(dev, buf, DAYLIGHT_MAX);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct adp5520_bl *data = dev_get_drvdata(dev);
|
||||
|
||||
strict_strtoul(buf, 10, &data->cached_daylight_max);
|
||||
return adp5520_store(dev, buf, count, DAYLIGHT_MAX);
|
||||
}
|
||||
static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
|
||||
adp5520_bl_daylight_max_store);
|
||||
|
||||
static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp5520_show(dev, buf, DARK_DIM);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
return adp5520_store(dev, buf, count, DARK_DIM);
|
||||
}
|
||||
static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
|
||||
adp5520_bl_dark_dim_store);
|
||||
|
||||
static ssize_t adp5520_bl_office_dim_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp5520_show(dev, buf, OFFICE_DIM);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_office_dim_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
return adp5520_store(dev, buf, count, OFFICE_DIM);
|
||||
}
|
||||
static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
|
||||
adp5520_bl_office_dim_store);
|
||||
|
||||
static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp5520_show(dev, buf, DAYLIGHT_DIM);
|
||||
}
|
||||
|
||||
static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
return adp5520_store(dev, buf, count, DAYLIGHT_DIM);
|
||||
}
|
||||
static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
|
||||
adp5520_bl_daylight_dim_store);
|
||||
|
||||
static struct attribute *adp5520_bl_attributes[] = {
|
||||
&dev_attr_dark_max.attr,
|
||||
&dev_attr_dark_dim.attr,
|
||||
&dev_attr_office_max.attr,
|
||||
&dev_attr_office_dim.attr,
|
||||
&dev_attr_daylight_max.attr,
|
||||
&dev_attr_daylight_dim.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group adp5520_bl_attr_group = {
|
||||
.attrs = adp5520_bl_attributes,
|
||||
};
|
||||
|
||||
static int __devinit adp5520_bl_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct backlight_device *bl;
|
||||
struct adp5520_bl *data;
|
||||
int ret = 0;
|
||||
|
||||
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
||||
if (data == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
data->master = pdev->dev.parent;
|
||||
data->pdata = pdev->dev.platform_data;
|
||||
|
||||
if (data->pdata == NULL) {
|
||||
dev_err(&pdev->dev, "missing platform data\n");
|
||||
kfree(data);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
data->id = pdev->id;
|
||||
data->current_brightness = 0;
|
||||
|
||||
mutex_init(&data->lock);
|
||||
|
||||
bl = backlight_device_register(pdev->name, data->master,
|
||||
data, &adp5520_bl_ops);
|
||||
if (IS_ERR(bl)) {
|
||||
dev_err(&pdev->dev, "failed to register backlight\n");
|
||||
kfree(data);
|
||||
return PTR_ERR(bl);
|
||||
}
|
||||
|
||||
bl->props.max_brightness =
|
||||
bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
|
||||
|
||||
if (data->pdata->en_ambl_sens)
|
||||
ret = sysfs_create_group(&bl->dev.kobj,
|
||||
&adp5520_bl_attr_group);
|
||||
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "failed to register sysfs\n");
|
||||
backlight_device_unregister(bl);
|
||||
kfree(data);
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, bl);
|
||||
ret |= adp5520_bl_setup(bl);
|
||||
backlight_update_status(bl);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit adp5520_bl_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct backlight_device *bl = platform_get_drvdata(pdev);
|
||||
struct adp5520_bl *data = bl_get_data(bl);
|
||||
|
||||
adp5520_clr_bits(data->master, MODE_STATUS, BL_EN);
|
||||
|
||||
if (data->pdata->en_ambl_sens)
|
||||
sysfs_remove_group(&bl->dev.kobj,
|
||||
&adp5520_bl_attr_group);
|
||||
|
||||
backlight_device_unregister(bl);
|
||||
kfree(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int adp5520_bl_suspend(struct platform_device *pdev,
|
||||
pm_message_t state)
|
||||
{
|
||||
struct backlight_device *bl = platform_get_drvdata(pdev);
|
||||
return adp5520_bl_set(bl, 0);
|
||||
}
|
||||
|
||||
static int adp5520_bl_resume(struct platform_device *pdev)
|
||||
{
|
||||
struct backlight_device *bl = platform_get_drvdata(pdev);
|
||||
|
||||
backlight_update_status(bl);
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define adp5520_bl_suspend NULL
|
||||
#define adp5520_bl_resume NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver adp5520_bl_driver = {
|
||||
.driver = {
|
||||
.name = "adp5520-backlight",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = adp5520_bl_probe,
|
||||
.remove = __devexit_p(adp5520_bl_remove),
|
||||
.suspend = adp5520_bl_suspend,
|
||||
.resume = adp5520_bl_resume,
|
||||
};
|
||||
|
||||
static int __init adp5520_bl_init(void)
|
||||
{
|
||||
return platform_driver_register(&adp5520_bl_driver);
|
||||
}
|
||||
module_init(adp5520_bl_init);
|
||||
|
||||
static void __exit adp5520_bl_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&adp5520_bl_driver);
|
||||
}
|
||||
module_exit(adp5520_bl_exit);
|
||||
|
||||
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
||||
MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:adp5520-backlight");
|
||||
Loading…
Reference in New Issue
Block a user