diff options
| author | Michael Welling <mwelling@ieee.org> | 2014-07-04 02:26:36 (GMT) |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-07-30 11:13:33 (GMT) |
| commit | d7aa64c32bdcb2c1bc5932b3d2927863ae31ccbc (patch) | |
| tree | 21e7ef73ea70e319bdf7ad8a1c0ffd338ff6c903 | |
| parent | d10715be03bd8bad59ddc50236cb140c3bd73c7b (diff) | |
| download | linux-d7aa64c32bdcb2c1bc5932b3d2927863ae31ccbc.tar.xz | |
drivers: video: fbdev: atmel_lcdfb.c: Add ability to inverted backlight PWM.
The code has a variable to change the polarity of the PWM backlight control but
it was not being initialized. This patch adds a devicetree entry to set the
variable if required.
Signed-off-by: Michael Welling <mwelling@ieee.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
| -rw-r--r-- | Documentation/devicetree/bindings/video/atmel,lcdc.txt | 1 | ||||
| -rw-r--r-- | drivers/video/fbdev/atmel_lcdfb.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/video/atmel,lcdc.txt b/Documentation/devicetree/bindings/video/atmel,lcdc.txt index 1ec175e..b75af94 100644 --- a/Documentation/devicetree/bindings/video/atmel,lcdc.txt +++ b/Documentation/devicetree/bindings/video/atmel,lcdc.txt @@ -46,6 +46,7 @@ Required properties (as per of_videomode_helper): Optional properties (as per of_videomode_helper): - atmel,lcdcon-backlight: enable backlight + - atmel,lcdcon-backlight-inverted: invert backlight PWM polarity - atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG" - atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed) diff --git a/drivers/video/fbdev/atmel_lcdfb.c b/drivers/video/fbdev/atmel_lcdfb.c index e683b6e..010443f 100644 --- a/drivers/video/fbdev/atmel_lcdfb.c +++ b/drivers/video/fbdev/atmel_lcdfb.c @@ -290,7 +290,7 @@ static void init_contrast(struct atmel_lcdfb_info *sinfo) /* contrast pwm can be 'inverted' */ if (pdata->lcdcon_pol_negative) - contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE); + contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE); /* have some default contrast/backlight settings */ lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr); @@ -1095,6 +1095,7 @@ static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo) pdata->lcd_wiring_mode = ret; pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight"); + pdata->lcdcon_pol_negative = of_property_read_bool(display_np, "atmel,lcdcon-backlight-inverted"); timings = of_get_display_timings(display_np); if (!timings) { |