davinci: Add platform support for da850/omap-l138 GLCD

This patch adds platform support for the graphic display
(Sharp LK043T1DG01) found on DA850/OMAP-L138 based EVM.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 52bfe4cba25c..b1df784ed702 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -17,6 +17,7 @@
 #include <linux/console.h>
 #include <linux/i2c.h>
 #include <linux/i2c/at24.h>
+#include <linux/gpio.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -29,6 +30,9 @@
 #define DA850_EVM_PHY_MASK              0x1
 #define DA850_EVM_MDIO_FREQUENCY        2200000 /* PHY bus frequency */
 
+#define DA850_LCD_BL_PIN                GPIO_TO_PIN(2, 15)
+#define DA850_LCD_PWR_PIN               GPIO_TO_PIN(8, 10)
+
 static struct davinci_i2c_platform_data da850_evm_i2c_0_pdata = {
         .bus_freq       = 100,  /* kHz */
         .bus_delay      = 0,    /* usec */
@@ -59,6 +63,37 @@ static struct snd_platform_data da850_evm_snd_data = {
         .rxnumevt       = 1,
 };
 
+static int da850_lcd_hw_init(void)
+{
+        int status;
+
+        status = gpio_request(DA850_LCD_BL_PIN, "lcd bl\n");
+        if (status < 0)
+                return status;
+
+        status = gpio_request(DA850_LCD_PWR_PIN, "lcd pwr\n");
+        if (status < 0) {
+                gpio_free(DA850_LCD_BL_PIN);
+                return status;
+        }
+
+        gpio_direction_output(DA850_LCD_BL_PIN, 0);
+        gpio_direction_output(DA850_LCD_PWR_PIN, 0);
+
+        /* disable lcd backlight */
+        gpio_set_value(DA850_LCD_BL_PIN, 0);
+
+        /* disable lcd power */
+        gpio_set_value(DA850_LCD_PWR_PIN, 0);
+
+        /* enable lcd power */
+        gpio_set_value(DA850_LCD_PWR_PIN, 1);
+
+        /* enable lcd backlight */
+        gpio_set_value(DA850_LCD_BL_PIN, 1);
+
+        return 0;
+}
 
 static __init void da850_evm_init(void)
 {
@@ -115,6 +150,21 @@ static __init void da850_evm_init(void)
                                 ret);
 
         da8xx_init_mcasp(0, &da850_evm_snd_data);
+
+        ret = da8xx_pinmux_setup(da850_lcdcntl_pins);
+        if (ret)
+                pr_warning("da850_evm_init: lcdcntl mux setup failed: %d\n",
+                                ret);
+
+        ret = da850_lcd_hw_init();
+        if (ret)
+                pr_warning("da850_evm_init: lcd initialization failed: %d\n",
+                                ret);
+
+        ret = da8xx_register_lcdc();
+        if (ret)
+                pr_warning("da850_evm_init: lcdc registration failed: %d\n",
+                                ret);
 }
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE