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Message-Id: <1336461627-30315-9-git-send-email-eric@eukrea.com>
Date: Tue, 8 May 2012 09:20:24 +0200
From: Eric Bénard <eric@...rea.com>
To: Sascha Hauer <kernel@...gutronix.de>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Eric Bénard <eric@...rea.com>
Subject: [PATCH 09/12] ARM: imx: eukrea_mbimxsd: add backlight and lcd support
From: Denis Carikli <denis@...rea.com>
Signed-off-by: Eric Bénard <eric@...rea.com>
Cc: Sascha Hauer <kernel@...gutronix.de>
---
arch/arm/mach-imx/eukrea_mbimxsd-baseboard.c | 74 ++++++++++++++++++++++++++
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 bc89bb6..920e42a 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));
--
1.7.7.6
--
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