391 строка
10 KiB
C
391 строка
10 KiB
C
/*
|
|
* 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>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
|
|
struct adp5520_bl {
|
|
struct device *master;
|
|
struct adp5520_backlight_platform_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, ADP5520_BL_CONTROL,
|
|
ADP5520_BL_AUTO_ADJ);
|
|
ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
|
|
brightness);
|
|
} else {
|
|
/*
|
|
* MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
|
|
* restore daylight l3 sysfs brightness
|
|
*/
|
|
ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
|
|
data->cached_daylight_max);
|
|
ret |= adp5520_set_bits(master, ADP5520_BL_CONTROL,
|
|
ADP5520_BL_AUTO_ADJ);
|
|
}
|
|
} else {
|
|
ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX, brightness);
|
|
}
|
|
|
|
if (data->current_brightness && brightness == 0)
|
|
ret |= adp5520_set_bits(master,
|
|
ADP5520_MODE_STATUS, ADP5520_DIM_EN);
|
|
else if (data->current_brightness == 0 && brightness)
|
|
ret |= adp5520_clr_bits(master,
|
|
ADP5520_MODE_STATUS, ADP5520_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, ADP5520_BL_VALUE, ®_val);
|
|
|
|
return error ? data->current_brightness : reg_val;
|
|
}
|
|
|
|
static const 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_platform_data *pdata = data->pdata;
|
|
int ret = 0;
|
|
|
|
ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
|
|
pdata->l1_daylight_max);
|
|
ret |= adp5520_write(master, ADP5520_DAYLIGHT_DIM,
|
|
pdata->l1_daylight_dim);
|
|
|
|
if (pdata->en_ambl_sens) {
|
|
data->cached_daylight_max = pdata->l1_daylight_max;
|
|
ret |= adp5520_write(master, ADP5520_OFFICE_MAX,
|
|
pdata->l2_office_max);
|
|
ret |= adp5520_write(master, ADP5520_OFFICE_DIM,
|
|
pdata->l2_office_dim);
|
|
ret |= adp5520_write(master, ADP5520_DARK_MAX,
|
|
pdata->l3_dark_max);
|
|
ret |= adp5520_write(master, ADP5520_DARK_DIM,
|
|
pdata->l3_dark_dim);
|
|
ret |= adp5520_write(master, ADP5520_L2_TRIP,
|
|
pdata->l2_trip);
|
|
ret |= adp5520_write(master, ADP5520_L2_HYS,
|
|
pdata->l2_hyst);
|
|
ret |= adp5520_write(master, ADP5520_L3_TRIP,
|
|
pdata->l3_trip);
|
|
ret |= adp5520_write(master, ADP5520_L3_HYS,
|
|
pdata->l3_hyst);
|
|
ret |= adp5520_write(master, ADP5520_ALS_CMPR_CFG,
|
|
ALS_CMPR_CFG_VAL(pdata->abml_filt,
|
|
ADP5520_L3_EN));
|
|
}
|
|
|
|
ret |= adp5520_write(master, ADP5520_BL_CONTROL,
|
|
BL_CTRL_VAL(pdata->fade_led_law,
|
|
pdata->en_ambl_sens));
|
|
|
|
ret |= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in,
|
|
pdata->fade_out));
|
|
|
|
ret |= adp5520_set_bits(master, ADP5520_MODE_STATUS,
|
|
ADP5520_BL_EN | ADP5520_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 ret;
|
|
uint8_t reg_val;
|
|
|
|
mutex_lock(&data->lock);
|
|
ret = adp5520_read(data->master, reg, ®_val);
|
|
mutex_unlock(&data->lock);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
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 = kstrtoul(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, ADP5520_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, ADP5520_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, ADP5520_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, ADP5520_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, ADP5520_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);
|
|
int ret;
|
|
|
|
ret = kstrtoul(buf, 10, &data->cached_daylight_max);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return adp5520_store(dev, buf, count, ADP5520_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, ADP5520_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, ADP5520_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, ADP5520_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, ADP5520_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, ADP5520_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, ADP5520_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 adp5520_bl_probe(struct platform_device *pdev)
|
|
{
|
|
struct backlight_properties props;
|
|
struct backlight_device *bl;
|
|
struct adp5520_bl *data;
|
|
int ret = 0;
|
|
|
|
data = devm_kzalloc(&pdev->dev, 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");
|
|
return -ENODEV;
|
|
}
|
|
|
|
data->id = pdev->id;
|
|
data->current_brightness = 0;
|
|
|
|
mutex_init(&data->lock);
|
|
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
props.type = BACKLIGHT_RAW;
|
|
props.max_brightness = ADP5020_MAX_BRIGHTNESS;
|
|
bl = backlight_device_register(pdev->name, data->master, data,
|
|
&adp5520_bl_ops, &props);
|
|
if (IS_ERR(bl)) {
|
|
dev_err(&pdev->dev, "failed to register backlight\n");
|
|
return PTR_ERR(bl);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, bl);
|
|
ret |= adp5520_bl_setup(bl);
|
|
backlight_update_status(bl);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int 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, ADP5520_MODE_STATUS, ADP5520_BL_EN);
|
|
|
|
if (data->pdata->en_ambl_sens)
|
|
sysfs_remove_group(&bl->dev.kobj,
|
|
&adp5520_bl_attr_group);
|
|
|
|
backlight_device_unregister(bl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int adp5520_bl_suspend(struct device *dev)
|
|
{
|
|
struct backlight_device *bl = dev_get_drvdata(dev);
|
|
|
|
return adp5520_bl_set(bl, 0);
|
|
}
|
|
|
|
static int adp5520_bl_resume(struct device *dev)
|
|
{
|
|
struct backlight_device *bl = dev_get_drvdata(dev);
|
|
|
|
backlight_update_status(bl);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(adp5520_bl_pm_ops, adp5520_bl_suspend,
|
|
adp5520_bl_resume);
|
|
|
|
static struct platform_driver adp5520_bl_driver = {
|
|
.driver = {
|
|
.name = "adp5520-backlight",
|
|
.owner = THIS_MODULE,
|
|
.pm = &adp5520_bl_pm_ops,
|
|
},
|
|
.probe = adp5520_bl_probe,
|
|
.remove = adp5520_bl_remove,
|
|
};
|
|
|
|
module_platform_driver(adp5520_bl_driver);
|
|
|
|
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
|
MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:adp5520-backlight");
|