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atmel_lcd: Allow contrast polarity to be either positive or negative

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Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
This commit is contained in:
Alexander Stein 2010-07-20 08:55:40 +02:00 • committed by Anatolij Gustschin
parent 55b05237b9
commit cdfcedbf25
2 changed files with 3 additions and 1 deletions
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3
drivers/video/atmel_lcdfb.c
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@ -143,8 +143,9 @@ void lcd_ctrl_init(void *lcdbase)
/* Set contrast */
value = ATMEL_LCDC_PS_DIV8 |
ATMEL_LCDC_POL_POSITIVE |
ATMEL_LCDC_ENA_PWMENABLE;
if (!panel_info.vl_cont_pol_low)
value |= ATMEL_LCDC_POL_POSITIVE;
lcdc_writel(panel_info.mmio, ATMEL_LCDC_CONTRAST_CTR, value);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);

1
include/lcd.h
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@ -167,6 +167,7 @@ typedef struct vidinfo {
u_long vl_sync; /* Horizontal / vertical sync */
u_long vl_bpix; /* Bits per pixel, 0 = 1, 1 = 2, 2 = 4, 3 = 8, 4 = 16 */
u_long vl_tft; /* 0 = passive, 1 = TFT */
u_long vl_cont_pol_low; /* contrast polarity is low */
/* Horizontal control register. */
u_long vl_hsync_len; /* Length of horizontal sync */