lcd: add corgibl_limit_intensity() to corgi_lcd
This is not generic enough, added here for backward compatibility.
And make this an individual commit so future revert will be a bit
easier.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c
index bf69e50..068f148 100644
--- a/drivers/video/backlight/corgi_lcd.c
+++ b/drivers/video/backlight/corgi_lcd.c
@@ -86,6 +86,7 @@
struct lcd_device *lcd_dev;
struct backlight_device *bl_dev;
+ int limit_mask;
int intensity;
int power;
int mode;
@@ -97,6 +98,11 @@
static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val);
+static struct corgi_lcd *the_corgi_lcd;
+static unsigned long corgibl_flags;
+#define CORGIBL_SUSPENDED 0x01
+#define CORGIBL_BATTLOW 0x02
+
/*
* This is only a psuedo I2C interface. We can't use the standard kernel
* routines as the interface is write only. We just assume the data is acked...
@@ -413,9 +419,25 @@
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
+ if (corgibl_flags & CORGIBL_SUSPENDED)
+ intensity = 0;
+ if (corgibl_flags & CORGIBL_BATTLOW)
+ intensity &= lcd->limit_mask;
+
return corgi_bl_set_intensity(lcd, intensity);
}
+void corgibl_limit_intensity(int limit)
+{
+ if (limit)
+ corgibl_flags |= CORGIBL_BATTLOW;
+ else
+ corgibl_flags &= ~CORGIBL_BATTLOW;
+
+ backlight_update_status(the_corgi_lcd->bl_dev);
+}
+EXPORT_SYMBOL(corgibl_limit_intensity);
+
static struct backlight_ops corgi_bl_ops = {
.get_brightness = corgi_bl_get_intensity,
.update_status = corgi_bl_update_status,
@@ -426,6 +448,7 @@
{
struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
+ corgibl_flags |= CORGIBL_SUSPENDED;
corgi_bl_set_intensity(lcd, 0);
corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
return 0;
@@ -435,6 +458,7 @@
{
struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
+ corgibl_flags &= ~CORGIBL_SUSPENDED;
corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
backlight_update_status(lcd->bl_dev);
return 0;
@@ -488,6 +512,9 @@
dev_set_drvdata(&spi->dev, lcd);
corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
backlight_update_status(lcd->bl_dev);
+
+ lcd->limit_mask = pdata->limit_mask;
+ the_corgi_lcd = lcd;
return 0;
err_unregister_lcd: