video/atmel_lcdfb: Introduce regulator support
This adds regulator support to enable/disable the LCD voltage, using 'lcd-supply' as regulator name. Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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@ -20,6 +20,9 @@ Required nodes:
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- default-mode: a videomode within the display with timing parameters
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as specified below.
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Optional properties:
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- lcd-supply: Regulator for LCD supply voltage.
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Example:
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fb0: fb@0x00500000 {
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@ -24,6 +24,7 @@
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <video/of_display_timing.h>
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#include <linux/regulator/consumer.h>
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#include <video/videomode.h>
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#include <mach/cpu.h>
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@ -60,6 +61,7 @@ struct atmel_lcdfb_info {
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struct atmel_lcdfb_pdata pdata;
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struct atmel_lcdfb_config *config;
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struct regulator *reg_lcd;
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};
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struct atmel_lcdfb_power_ctrl_gpio {
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@ -302,10 +304,24 @@ static void init_contrast(struct atmel_lcdfb_info *sinfo)
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static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int on)
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{
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int ret;
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struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
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if (pdata->atmel_lcdfb_power_control)
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pdata->atmel_lcdfb_power_control(pdata, on);
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else if (sinfo->reg_lcd) {
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if (on) {
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ret = regulator_enable(sinfo->reg_lcd);
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if (ret)
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dev_err(&sinfo->pdev->dev,
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"lcd regulator enable failed: %d\n", ret);
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} else {
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ret = regulator_disable(sinfo->reg_lcd);
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if (ret)
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dev_err(&sinfo->pdev->dev,
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"lcd regulator disable failed: %d\n", ret);
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}
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}
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}
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static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
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@ -1193,6 +1209,10 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
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if (!sinfo->config)
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goto free_info;
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sinfo->reg_lcd = devm_regulator_get(&pdev->dev, "lcd");
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if (IS_ERR(sinfo->reg_lcd))
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sinfo->reg_lcd = NULL;
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info->flags = ATMEL_LCDFB_FBINFO_DEFAULT;
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info->pseudo_palette = sinfo->pseudo_palette;
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info->fbops = &atmel_lcdfb_ops;
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