[PATCH] imxfb: add the possibility to control PWMR
From: Eric Bénard <hidden>
Date: 2010-06-25 07:53:20
this adds the possibility to enable/disable the backlight through the PWMR register, as offered in mx3fb. Signed-off-by: Eric Bénard <redacted> --- arch/arm/plat-mxc/include/mach/imxfb.h | 1 + drivers/video/imxfb.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-mxc/include/mach/imxfb.h b/arch/arm/plat-mxc/include/mach/imxfb.h
index 5263506..3c24778 100644
--- a/arch/arm/plat-mxc/include/mach/imxfb.h
+++ b/arch/arm/plat-mxc/include/mach/imxfb.h@@ -67,6 +67,7 @@ struct imx_fb_platform_data { u_int pwmr; u_int lscr1; u_int dmacr; + u_int backlight_level; u_char * fixed_screen_cpu; dma_addr_t fixed_screen_dma;
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index b4b6dec..9451200 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c@@ -169,6 +169,7 @@ struct imxfb_info { u_int pwmr; u_int lscr1; u_int dmacr; + u_int backlight_level; u_int cmap_inverse:1, cmap_static:1, unused:30;
@@ -302,6 +303,14 @@ static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, return ret; } +static void imx_fb_set_brightness(struct imxfb_info *fbi, uint8_t value) +{ + pr_debug("%s: value = %d\n", __func__, value); + /* This might be board-specific */ + writel((fbi->pwmr & ~0xFF) | value, fbi->regs + LCDC_PWMR); + return; +} + static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi) { struct imx_fb_videomode *m;
@@ -470,12 +479,16 @@ static void imxfb_enable_controller(struct imxfb_info *fbi) fbi->backlight_power(1); if (fbi->lcd_power) fbi->lcd_power(1); + if (fbi->backlight_level) + imx_fb_set_brightness(fbi, fbi->backlight_level); } static void imxfb_disable_controller(struct imxfb_info *fbi) { pr_debug("Disabling LCD controller\n"); + if (fbi->backlight_level) + imx_fb_set_brightness(fbi, 0); if (fbi->backlight_power) fbi->backlight_power(0); if (fbi->lcd_power)
@@ -660,6 +673,7 @@ static int __init imxfb_init_fbinfo(struct platform_device *pdev) fbi->pwmr = pdata->pwmr; fbi->lcd_power = pdata->lcd_power; fbi->backlight_power = pdata->backlight_power; + fbi->backlight_level = pdata->backlight_level; for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++) info->fix.smem_len = max_t(size_t, info->fix.smem_len,
--
1.6.3.3