backlight: lp855x_bl: simplify bl_get_brightness()

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>

diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index edd2041b1527703de5346981f8a95de800ecde29..7ae9ae6f4655999ccbdc1f7f91e73d52070e5e7c 100644 (file)
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -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;
 }