This adds regulator support to enable/disable the LCD voltage, using 'lcd-supply' as regulator name.
Signed-off-by: Alexander Stein <[email protected]> --- .../devicetree/bindings/video/atmel,lcdc.txt | 3 +++ drivers/video/fbdev/atmel_lcdfb.c | 20 ++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/Documentation/devicetree/bindings/video/atmel,lcdc.txt b/Documentation/devicetree/bindings/video/atmel,lcdc.txt index 1ec175eddca8..5ae0faf443c3 100644 --- a/Documentation/devicetree/bindings/video/atmel,lcdc.txt +++ b/Documentation/devicetree/bindings/video/atmel,lcdc.txt @@ -20,6 +20,9 @@ Required nodes: - default-mode: a videomode within the display with timing parameters as specified below. +Optional properties: +- lcd-supply: Regulator for LCD supply voltage. + Example: fb0: fb@0x00500000 { diff --git a/drivers/video/fbdev/atmel_lcdfb.c b/drivers/video/fbdev/atmel_lcdfb.c index d36e830d6fc6..59fd2e062d4f 100644 --- a/drivers/video/fbdev/atmel_lcdfb.c +++ b/drivers/video/fbdev/atmel_lcdfb.c @@ -24,6 +24,7 @@ #include <linux/of_device.h> #include <linux/of_gpio.h> #include <video/of_display_timing.h> +#include <linux/regulator/consumer.h> #include <video/videomode.h> #include <mach/cpu.h> @@ -60,6 +61,7 @@ struct atmel_lcdfb_info { struct atmel_lcdfb_pdata pdata; struct atmel_lcdfb_config *config; + struct regulator *reg_lcd; }; struct atmel_lcdfb_power_ctrl_gpio { @@ -302,10 +304,24 @@ static void init_contrast(struct atmel_lcdfb_info *sinfo) static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int on) { + int ret; struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; if (pdata->atmel_lcdfb_power_control) pdata->atmel_lcdfb_power_control(pdata, on); + else if (sinfo->reg_lcd) { + if (on) { + ret = regulator_enable(sinfo->reg_lcd); + if (ret) + dev_err(&sinfo->pdev->dev, + "lcd regulator enable failed: %d\n", ret); + } else { + ret = regulator_disable(sinfo->reg_lcd); + if (ret) + dev_err(&sinfo->pdev->dev, + "lcd regulator disable failed: %d\n", ret); + } + } } static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = { @@ -1192,6 +1208,10 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev) if (!sinfo->config) goto free_info; + sinfo->reg_lcd = devm_regulator_get(&pdev->dev, "lcd"); + if (IS_ERR(sinfo->reg_lcd)) + sinfo->reg_lcd = NULL; + info->flags = ATMEL_LCDFB_FBINFO_DEFAULT; info->pseudo_palette = sinfo->pseudo_palette; info->fbops = &atmel_lcdfb_ops; -- 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
