TWL4030 LEDdriver A(LEDA) is used here to control the LCD backlight
Signed-off-by: Arun C <[EMAIL PROTECTED]>
---
drivers/video/omap/lcd_omap3evm.c | 39 +++++++++++++++++++++++++++++++++---
1 files changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/video/omap/lcd_omap3evm.c
b/drivers/video/omap/lcd_omap3evm.c
index 5d2ed04..f5a1477 100644
--- a/drivers/video/omap/lcd_omap3evm.c
+++ b/drivers/video/omap/lcd_omap3evm.c
@@ -45,6 +45,12 @@
#define ENABLE_VPLL2_DEDICATED 0x05
#define ENABLE_VPLL2_DEV_GRP 0xE0
+#define TWL_LED_LEDEN 0x00
+#define TWL_PWMA_PWMAON 0x00
+#define TWL_PWMA_PWMAOFF 0x01
+
+static unsigned int bklight_level;
+
static int omap3evm_panel_init(struct lcd_panel *panel,
struct omapfb_device *fbdev)
{
@@ -60,10 +66,10 @@ static int omap3evm_panel_init(struct lcd_panel *panel,
omap_set_gpio_direction(LCD_PANEL_RESB, 0);
omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 0);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 1);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 0);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 1);
+ twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
+ bklight_level = 100;
omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
omap_set_gpio_dataout(LCD_PANEL_INI, 1);
@@ -94,6 +100,28 @@ static unsigned long
omap3evm_panel_get_caps(struct lcd_panel *panel)
return 0;
}
+static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
+ unsigned int level)
+{
+ u8 c;
+ if ((level >= 0) && (level <= 100)) {
+ c = (125 * (100 - level)) / 100 + 2;
+ twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
+ bklight_level = level;
+ }
+ return 0;
+}
+
+static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
+{
+ return bklight_level;
+}
+
+static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
+{
+ return 100;
+}
+
struct lcd_panel omap3evm_panel = {
.name = "omap3evm",
.config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
@@ -117,6 +145,9 @@ struct lcd_panel omap3evm_panel = {
.enable = omap3evm_panel_enable,
.disable = omap3evm_panel_disable,
.get_caps = omap3evm_panel_get_caps,
+ .set_bklight_level = omap3evm_bklight_setlevel,
+ .get_bklight_level = omap3evm_bklight_getlevel,
+ .get_bklight_max = omap3evm_bklight_getmaxlevel,
};
static int omap3evm_panel_probe(struct platform_device *pdev)
--
1.5.5.3
From 92a1094c65e90ae0f0fe5b970f733d584d2f7201 Mon Sep 17 00:00:00 2001
From: Arun C <[EMAIL PROTECTED]>
Date: Tue, 1 Jul 2008 16:54:55 +0530
Subject: [PATCH] This patch adds backlight control for omap3evm
TWL4030 LEDdriver A(LEDA) is used here to control the LCD backlight
Signed-off-by: Arun C <[EMAIL PROTECTED]>
---
drivers/video/omap/lcd_omap3evm.c | 39 +++++++++++++++++++++++++++++++++---
1 files changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/video/omap/lcd_omap3evm.c b/drivers/video/omap/lcd_omap3evm.c
index 5d2ed04..f5a1477 100644
--- a/drivers/video/omap/lcd_omap3evm.c
+++ b/drivers/video/omap/lcd_omap3evm.c
@@ -45,6 +45,12 @@
#define ENABLE_VPLL2_DEDICATED 0x05
#define ENABLE_VPLL2_DEV_GRP 0xE0
+#define TWL_LED_LEDEN 0x00
+#define TWL_PWMA_PWMAON 0x00
+#define TWL_PWMA_PWMAOFF 0x01
+
+static unsigned int bklight_level;
+
static int omap3evm_panel_init(struct lcd_panel *panel,
struct omapfb_device *fbdev)
{
@@ -60,10 +66,10 @@ static int omap3evm_panel_init(struct lcd_panel *panel,
omap_set_gpio_direction(LCD_PANEL_RESB, 0);
omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 0);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 1);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 0);
- twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 1);
+ twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
+ bklight_level = 100;
omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
omap_set_gpio_dataout(LCD_PANEL_INI, 1);
@@ -94,6 +100,28 @@ static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
return 0;
}
+static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
+ unsigned int level)
+{
+ u8 c;
+ if ((level >= 0) && (level <= 100)) {
+ c = (125 * (100 - level)) / 100 + 2;
+ twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
+ bklight_level = level;
+ }
+ return 0;
+}
+
+static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
+{
+ return bklight_level;
+}
+
+static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
+{
+ return 100;
+}
+
struct lcd_panel omap3evm_panel = {
.name = "omap3evm",
.config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
@@ -117,6 +145,9 @@ struct lcd_panel omap3evm_panel = {
.enable = omap3evm_panel_enable,
.disable = omap3evm_panel_disable,
.get_caps = omap3evm_panel_get_caps,
+ .set_bklight_level = omap3evm_bklight_setlevel,
+ .get_bklight_level = omap3evm_bklight_getlevel,
+ .get_bklight_max = omap3evm_bklight_getmaxlevel,
};
static int omap3evm_panel_probe(struct platform_device *pdev)
--
1.5.5.3
