static int da903x_backlight_probe(struct platform_device *pdev)
{
struct da9034_backlight_pdata *pdata = pdev->dev.platform_data;
struct da903x_backlight_data *data;
struct backlight_device *bl;
struct backlight_properties props;
int max_brightness;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
switch (pdev->id) {
case DA9030_ID_WLED:
max_brightness = DA9030_MAX_BRIGHTNESS;
break;
case DA9034_ID_WLED:
max_brightness = DA9034_MAX_BRIGHTNESS;
break;
default:
dev_err(&pdev->dev, "invalid backlight device ID(%d)\n",
pdev->id);
kfree(data);
return -EINVAL;
}
data->id = pdev->id;
data->da903x_dev = pdev->dev.parent;
data->current_brightness = 0;
/* adjust the WLED output current */
if (pdata)
da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2,
DA9034_WLED_ISET(pdata->output_current));
props.type = BACKLIGHT_RAW;
props.max_brightness = max_brightness;
bl = backlight_device_register(pdev->name, data->da903x_dev, data,
&da903x_backlight_ops, &props);
if (IS_ERR(bl)) {
dev_err(&pdev->dev, "failed to register backlight\n");
kfree(data);
return PTR_ERR(bl);
}
bl->props.brightness = max_brightness;
platform_set_drvdata(pdev, bl);
backlight_update_status(bl);
return 0;
}
static int da903x_backlight_set(struct backlight_device *bl, int brightness)
{
struct da903x_backlight_data *data = bl_get_data(bl);
struct device *dev = data->da903x_dev;
uint8_t val;
int ret = 0;
switch (data->id) {
case DA9034_ID_WLED:
ret = da903x_update(dev, DA9034_WLED_CONTROL1,
brightness, 0x7f);
if (ret)
return ret;
if (data->current_brightness && brightness == 0)
ret = da903x_clr_bits(dev,
DA9034_WLED_CONTROL2,
DA9034_WLED_BOOST_EN);
if (data->current_brightness == 0 && brightness)
ret = da903x_set_bits(dev,
DA9034_WLED_CONTROL2,
DA9034_WLED_BOOST_EN);
break;
case DA9030_ID_WLED:
val = DA9030_WLED_TRIM(brightness);
val |= brightness ? DA9030_WLED_CP_EN : 0;
ret = da903x_write(dev, DA9030_WLED_CONTROL, val);
break;
}
if (ret)
return ret;
data->current_brightness = brightness;
return 0;
}
static int da903x_backlight_probe(struct platform_device *pdev)
{
struct da9034_backlight_pdata *pdata = pdev->dev.platform_data;
struct da903x_backlight_data *data;
struct backlight_device *bl;
struct backlight_properties props;
int max_brightness;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
switch (pdev->id) {
case DA9030_ID_WLED:
max_brightness = DA9030_MAX_BRIGHTNESS;
break;
case DA9034_ID_WLED:
max_brightness = DA9034_MAX_BRIGHTNESS;
break;
default:
dev_err(&pdev->dev, "invalid backlight device ID(%d)\n",
pdev->id);
kfree(data);
return -EINVAL;
}
data->id = pdev->id;
data->da903x_dev = pdev->dev.parent;
data->current_brightness = 0;
/* adjust the WLED output current */
if (pdata)
da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2,
DA9034_WLED_ISET(pdata->output_current));
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