pcf50633-backlight.patch

Move backlight support out of pcf50633 driver. backlight
support now uses corgibl aka generic backlight support.

Set
CONFIG_BACKLIGHT_CORGI=y to use it.

1 files changed, 50 insertions, 10 deletions

diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index 96f4502b2b2..a0cebaec1b9 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -46,7 +46,7 @@
 #include <linux/mtd/physmap.h>
 
 #include <linux/i2c.h>
-
+#include <linux/backlight.h>
 #include <linux/regulator/machine.h>
 
 #include <linux/pcf50633.h>
@@ -683,8 +683,6 @@ struct pcf50633_platform_data gta02_pcf_pdata = {
 			},
 		},
 	},
-	.defer_resume_backlight = 1,
-	.resume_backlight_ramp_speed = 5,
 	.attach_child_devices = gta02_pcf50633_attach_child_devices,
 	.regulator_registered = gta02_pcf50633_regulator_registered,
 
@@ -984,24 +982,66 @@ static struct s3c2410_ts_mach_info gta02_ts_cfg = {
 	},
 };
 
+/* Backlight control */
+
+static void gta02_bl_set_intensity(int intensity)
+{
+	struct pcf50633_data *pcf = gta02_pcf_pdata.pcf;
+
+	int old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
+	int ret;
+
+	if (!(pcf50633_reg_read(pcf, PCF50633_REG_LEDENA) & 3))
+		old_intensity = 0;
+
+	/*
+	 * The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
+	 * if seen, you have to re-enable the LED unit
+	 */
+	if (!intensity || !old_intensity)
+		pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0);
+
+	if (!intensity) /* illegal to set LEDOUT to 0 */
+		ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
+	else
+		ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
+			       intensity);
+
+	if (intensity)
+		pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 2);
+}
+
+static struct generic_bl_info gta02_bl_info = {
+	.name 			= "gta02-bl",
+	.max_intensity 		= 0xff,
+	.default_intensity 	= 0xff,
+	.set_bl_intensity 	= gta02_bl_set_intensity,
+};
+
+static struct platform_device gta02_bl_dev = {
+	.name		  = "generic-bl",
+	.id		  = 1,
+	.dev = {
+		.platform_data = &gta02_bl_info,
+	},
+};
+
 /* SPI: LCM control interface attached to Glamo3362 */
 
 static void gta02_jbt6k74_reset(int devidx, int level)
 {
 	glamo_lcm_reset(level);
-}
+}	
 
-/* finally bring up deferred backlight resume now LCM is resumed itself */
-
-static void gta02_jbt6k74_resuming(int devidx)
+static void gta02_jbt6k74_probe_completed(struct device *dev)
 {
-	pcf50633_backlight_resume(gta02_pcf_pdata.pcf);
+	gta02_bl_dev.dev.parent = dev;
+	platform_device_register(&gta02_bl_dev);
 }
 
-
 const struct jbt6k74_platform_data jbt6k74_pdata = {
 	.reset		= gta02_jbt6k74_reset,
-	.resuming	= gta02_jbt6k74_resuming,
+	.probe_completed = gta02_jbt6k74_probe_completed,
 };
 
 static struct spi_board_info gta02_spi_board_info[] = {