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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>
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d10715be03
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2 changed files with 3 additions and 1 deletions
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@ -46,6 +46,7 @@ Required properties (as per of_videomode_helper):
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Optional properties (as per of_videomode_helper):
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- atmel,lcdcon-backlight: enable backlight
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- atmel,lcdcon-backlight-inverted: invert backlight PWM polarity
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- atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG"
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- atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed)
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@ -290,7 +290,7 @@ static void init_contrast(struct atmel_lcdfb_info *sinfo)
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/* contrast pwm can be 'inverted' */
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if (pdata->lcdcon_pol_negative)
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contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE);
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contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE);
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/* have some default contrast/backlight settings */
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lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
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@ -1095,6 +1095,7 @@ static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
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pdata->lcd_wiring_mode = ret;
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pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight");
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pdata->lcdcon_pol_negative = of_property_read_bool(display_np, "atmel,lcdcon-backlight-inverted");
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timings = of_get_display_timings(display_np);
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if (!timings) {
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