ARM: imx: eukrea_mbimxsd: add backlight and lcd support

Signed-off-by: Eric Bénard <eric@eukrea.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 74 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/eukrea_mbimxsd-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd-baseboard.c
index bc89bb6430e8..920e42a9389f 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd-baseboard.c
@@ -28,6 +28,8 @@
 #include <linux/platform_device.h>
 #include <linux/input.h>
 #include <linux/i2c.h>
+#include <video/platform_lcd.h>
+#include <linux/backlight.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -71,10 +73,57 @@ static iomux_v3_cfg_t eukrea_mbimxsd_pads[] = {
         MX51_PAD_AUD3_BB_RXD__AUD3_RXD,
         MX51_PAD_AUD3_BB_CK__AUD3_TXC,
         MX51_PAD_AUD3_BB_FS__AUD3_TXFS,
+        /* LCD Backlight */
+        MX51_PAD_DI1_D1_CS__GPIO3_4,
+        /* LCD RST */
+        MX51_PAD_CSI1_D9__GPIO3_13,
 };
 
 #define GPIO_LED1       IMX_GPIO_NR(3, 30)
 #define GPIO_SWITCH1    IMX_GPIO_NR(3, 31)
+#define GPIO_LCDRST     IMX_GPIO_NR(3, 13)
+#define GPIO_LCDBL      IMX_GPIO_NR(3, 4)
+
+static void eukrea_mbimxsd51_lcd_power_set(struct plat_lcd_data *pd,
+                                   unsigned int power)
+{
+        if (power)
+                gpio_direction_output(GPIO_LCDRST, 1);
+        else
+                gpio_direction_output(GPIO_LCDRST, 0);
+}
+
+static struct plat_lcd_data eukrea_mbimxsd51_lcd_power_data = {
+        .set_power              = eukrea_mbimxsd51_lcd_power_set,
+};
+
+static struct platform_device eukrea_mbimxsd51_lcd_powerdev = {
+        .name                   = "platform-lcd",
+        .dev.platform_data      = &eukrea_mbimxsd51_lcd_power_data,
+};
+
+static void eukrea_mbimxsd51_bl_set_intensity(int intensity)
+{
+        if (intensity)
+                gpio_direction_output(GPIO_LCDBL, 1);
+        else
+                gpio_direction_output(GPIO_LCDBL, 0);
+}
+
+static struct generic_bl_info eukrea_mbimxsd51_bl_info = {
+        .name                   = "eukrea_mbimxsd51-bl",
+        .max_intensity          = 0xff,
+        .default_intensity      = 0xff,
+        .set_bl_intensity       = eukrea_mbimxsd51_bl_set_intensity,
+};
+
+static struct platform_device eukrea_mbimxsd51_bl_dev = {
+        .name                   = "generic-bl",
+        .id                     = 1,
+        .dev = {
+                .platform_data  = &eukrea_mbimxsd51_bl_info,
+        },
+};
 
 static const struct gpio_led eukrea_mbimxsd_leds[] __initconst = {
         {
@@ -122,6 +171,19 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
         .flags = IMX_SSI_SYN | IMX_SSI_NET | IMX_SSI_USE_I2S_SLAVE,
 };
 
+static int screen_type;
+
+static int __init eukrea_mbimxsd51_screen_type(char *options)
+{
+        if (!strcmp(options, "dvi"))
+                screen_type = 1;
+        else if (!strcmp(options, "tft"))
+                screen_type = 0;
+
+        return 0;
+}
+__setup("screen_type=", eukrea_mbimxsd51_screen_type);
+
 /*
  * system init for baseboard usage. Will be called by cpuimx51sd init.
  *
@@ -149,6 +211,18 @@ void __init eukrea_mbimxsd51_baseboard_init(void)
         gpio_direction_input(GPIO_SWITCH1);
         gpio_free(GPIO_SWITCH1);
 
+        gpio_request(GPIO_LCDRST, "LCDRST");
+        gpio_direction_output(GPIO_LCDRST, 0);
+        gpio_request(GPIO_LCDBL, "LCDBL");
+        gpio_direction_output(GPIO_LCDBL, 0);
+        if (!screen_type) {
+                platform_device_register(&eukrea_mbimxsd51_bl_dev);
+                platform_device_register(&eukrea_mbimxsd51_lcd_powerdev);
+        } else {
+                gpio_free(GPIO_LCDRST);
+                gpio_free(GPIO_LCDBL);
+        }
+
         i2c_register_board_info(0, eukrea_mbimxsd_i2c_devices,
                                 ARRAY_SIZE(eukrea_mbimxsd_i2c_devices));