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[linux] support increase/decrease in screen brightness

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Signed-off-by: Xiangfu Liu <xiangfu@sharism.cc>
This commit is contained in:
Xiangfu Liu 2010-11-10 00:29:19 +08:00
parent 32f2e8be45
commit eb8096a879
2 changed files with 13 additions and 16 deletions
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26
target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c
View File

@ -83,18 +83,19 @@ static int gpm940b0_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
return 0; return 0;
} }
/* int gpm940b0_bl_get_brightness(struct backlight_device *bl)
{
return bl->props.brightness;
}
int gpm940b0_bl_update_status(struct backlight_device *bl) int gpm940b0_bl_update_status(struct backlight_device *bl)
{ {
struct gpm940b0 *gpm940b0 = bl_get_data(bl); struct gpm940b0 *gpm940b0 = bl_get_data(bl);
gpm940b0->reg5 &= ~0x38; gpm940b0_write_reg(gpm940b0->spi, 0x3, (bl->props.brightness));
gpm940b0->reg5 |= ((bl->props.brightness << 3) & 0x38);
gpm940b0_write_reg(gpm940b0->spi, 0x5, gpm940b0->reg5);
return 0; return 0;
}*/ }
static ssize_t reg_write(struct device *dev, struct device_attribute *attr, static ssize_t reg_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count) const char *buf, size_t count)
@ -119,12 +120,10 @@ static struct lcd_ops gpm940b0_lcd_ops = {
.set_mode = gpm940b0_set_mode, .set_mode = gpm940b0_set_mode,
}; };
#if 0
static struct backlight_ops gpm940b0_bl_ops = { static struct backlight_ops gpm940b0_bl_ops = {
/* .get_brightness = gpm940b0_bl_get_brightness,*/ .get_brightness = gpm940b0_bl_get_brightness,
.update_status = gpm940b0_bl_update_status, .update_status = gpm940b0_bl_update_status,
}; };
#endif
static int __devinit gpm940b0_probe(struct spi_device *spi) static int __devinit gpm940b0_probe(struct spi_device *spi)
{ {
@ -154,7 +153,6 @@ static int __devinit gpm940b0_probe(struct spi_device *spi)
gpm940b0->lcd->props.max_contrast = 255; gpm940b0->lcd->props.max_contrast = 255;
#if 0
gpm940b0->bl = backlight_device_register("gpm940b0-bl", &spi->dev, gpm940b0, gpm940b0->bl = backlight_device_register("gpm940b0-bl", &spi->dev, gpm940b0,
&gpm940b0_bl_ops); &gpm940b0_bl_ops);
@ -163,11 +161,11 @@ static int __devinit gpm940b0_probe(struct spi_device *spi)
dev_err(&spi->dev, "Failed to register backlight device: %d\n", ret); dev_err(&spi->dev, "Failed to register backlight device: %d\n", ret);
gpm940b0->bl = NULL; gpm940b0->bl = NULL;
} else { } else {
gpm940b0->bl->props.max_brightness = 8; gpm940b0->bl->props.max_brightness = 255;
gpm940b0->bl->props.brightness = 0; gpm940b0->bl->props.brightness = 64;
gpm940b0->bl->props.power = FB_BLANK_UNBLANK; gpm940b0->bl->props.power = FB_BLANK_UNBLANK;
} }
#endif backlight_update_status(gpm940b0->bl);
ret = device_create_file(&spi->dev, &dev_attr_reg); ret = device_create_file(&spi->dev, &dev_attr_reg);
if (ret) if (ret)
@ -190,10 +188,8 @@ err_free_gpm940b0:
static int __devexit gpm940b0_remove(struct spi_device *spi) static int __devexit gpm940b0_remove(struct spi_device *spi)
{ {
struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi); struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
#if 0
if (gpm940b0->bl) if (gpm940b0->bl)
backlight_device_unregister(gpm940b0->bl); backlight_device_unregister(gpm940b0->bl);
#endif
lcd_device_unregister(gpm940b0->lcd); lcd_device_unregister(gpm940b0->lcd);

3
target/linux/xburst/qi_lb60/config-2.6.32
View File

@ -1,3 +1,4 @@
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_BATTERY_JZ4740=y CONFIG_BATTERY_JZ4740=y
CONFIG_CMDLINE="root=/dev/ram0 rootfstype=ramfs console=ttyS0,57600 console=tty0 mem=32M" CONFIG_CMDLINE="root=/dev/ram0 rootfstype=ramfs console=ttyS0,57600 console=tty0 mem=32M"
@ -19,4 +20,4 @@ CONFIG_SPI=y
CONFIG_SPI_BITBANG=y CONFIG_SPI_BITBANG=y
CONFIG_SPI_GPIO=y CONFIG_SPI_GPIO=y
CONFIG_SPI_MASTER=y CONFIG_SPI_MASTER=y
CONFIG_USB_ETH_RNDIS=n # CONFIG_USB_ETH_RNDIS is not set