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backlight: update bl_brightness

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This commit is contained in:
lyx 2011-04-21 19:11:04 -07:00
commit 48d8ad46cf
1 changed files with 6 additions and 2 deletions
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8
drivers/video/backlight/wm831x_bl.c
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@ -24,6 +24,7 @@
#include <linux/delay.h>
#include <linux/ktime.h>
#define BL_SET 255
#define BL_MISC_VALUE 20
#define BL_INIT_VALUE 102
struct wm831x_backlight_data {
struct wm831x *wm831x;
@ -117,8 +118,11 @@ err:
static int wm831x_backlight_update_status(struct backlight_device *bl)
{
int brightness = bl->props.brightness;
if (brightness<=BL_INIT_VALUE) {
brightness = 111*brightness/51;
if (brightness<=BL_MISC_VALUE) {
brightness = 8*brightness;
}
else if (brightness<=BL_INIT_VALUE) {
brightness = 31*brightness/41 + 145;
}
else {
brightness = 33*brightness/153 + 200;