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backlight: lp855x_bl: simplify bl_get_brightness()

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Getting the brightness value is not critical, no need to read the actual
register value.  To simplify it, just return the 'bl->props.brightness'
value.  Then, lp855x_read_byte() can be removed, not used any more.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kim, Milo 2013-02-21 16:44:07 -08:00 committed by Linus Torvalds
parent 26e8ccc223
commit 9e9cdc8969
1 changed files with 0 additions and 24 deletions
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24
drivers/video/backlight/lp855x_bl.c
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@ -66,20 +66,6 @@ struct lp855x {
struct pwm_device *pwm;
};
static int lp855x_read_byte(struct lp855x *lp, u8 reg, u8 *data)
{
int ret;
ret = i2c_smbus_read_byte_data(lp->client, reg);
if (ret < 0) {
dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
return ret;
}
*data = (u8)ret;
return 0;
}
static int lp855x_write_byte(struct lp855x *lp, u8 reg, u8 data)
{
return i2c_smbus_write_byte_data(lp->client, reg, data);
@ -274,16 +260,6 @@ static int lp855x_bl_update_status(struct backlight_device *bl)
static int lp855x_bl_get_brightness(struct backlight_device *bl)
{
struct lp855x *lp = bl_get_data(bl);
enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode;
if (mode == REGISTER_BASED) {
u8 val = 0;
lp855x_read_byte(lp, lp->cfg->reg_brightness, &val);
bl->props.brightness = val;
}
return bl->props.brightness;
}