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>
diff --git a/drivers/video/fbdev/atmel_lcdfb.c b/drivers/video/fbdev/atmel_lcdfb.c
index 92640d4..10d0380 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_pdata pdata;
struct atmel_lcdfb_config *config;
+ struct regulator *reg_lcd;
};
struct atmel_lcdfb_power_ctrl_gpio {
@@ -302,10 +304,24 @@
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 = {
@@ -1193,6 +1209,10 @@
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;