ENGR00120621-2 i.MX28 LED support

1. Add platform support
2. Changed LED to control brightness by inactve couter

Signed-off-by: Yao Jeremy <r65161@freescale.com>
Signed-off-by: Fred.fan <r01011@freescale.com>
Signed-off-by: Alejandro Gonzalez <alex.gonzalez@digi.com>

6 files changed, 109 insertions, 6 deletions

diff --git a/arch/arm/mach-mx28/device.c b/arch/arm/mach-mx28/device.c
index 3ed83d0b99f4..1b6a08f7a193 100644
--- a/arch/arm/mach-mx28/device.c
+++ b/arch/arm/mach-mx28/device.c
@@ -751,6 +751,7 @@ static void __init mx28_init_ts(void)
 	;
 }
 #endif
+
 int __init mx28_device_init(void)
 {
 	mx28_init_dma();
@@ -765,7 +766,6 @@ int __init mx28_device_init(void)
 	mx28_init_kbd();
 	mx28_init_ts();
 	mx28_init_lcdif();
-
 	return 0;
 }
 
diff --git a/arch/arm/mach-mx28/mx28evk.c b/arch/arm/mach-mx28/mx28evk.c
index cf7eaaa23457..a449571a134c 100644
--- a/arch/arm/mach-mx28/mx28evk.c
+++ b/arch/arm/mach-mx28/mx28evk.c
@@ -19,6 +19,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/platform_device.h>
 
@@ -39,9 +40,53 @@ static void __init fixup_board(struct machine_desc *desc, struct tag *tags,
 	mx28_set_input_clk(24000000, 24000000, 32000, 50000000);
 }
 
+#if defined(CONFIG_LEDS_MXS) || defined(CONFIG_LEDS_MXS_MODULE)
+static struct mxs_pwm_led  mx28evk_led_pwm[2] = {
+	[0] = {
+		.name = "led-pwm0",
+		.pwm = 0,
+		},
+	[1] = {
+		.name = "led-pwm1",
+		.pwm = 1,
+		},
+};
+
+struct mxs_pwm_leds_plat_data mx28evk_led_data = {
+	.num = ARRAY_SIZE(mx28evk_led_pwm),
+	.leds = mx28evk_led_pwm,
+};
+
+static struct resource mx28evk_led_res = {
+	.flags = IORESOURCE_MEM,
+	.start = PWM_PHYS_ADDR,
+	.end   = PWM_PHYS_ADDR + 0x3FFF,
+};
+
+static void __init mx28evk_init_leds(void)
+{
+	struct platform_device *pdev;
+
+	pdev = mxs_get_device("mxs-leds", 0);
+	if (pdev == NULL || IS_ERR(pdev))
+		return;
+
+	pdev->resource = &mx28evk_led_res;
+	pdev->num_resources = 1;
+	pdev->dev.platform_data = &mx28evk_led_data;
+	mxs_add_device(pdev, 3);
+}
+#else
+static void __init mx28evk_init_leds(void)
+{
+	;
+}
+#endif
+
 static void __init mx28evk_device_init(void)
 {
 	/* Add mx28evk special code */
+	mx28evk_init_leds();
 }
 
 static void __init mx28evk_init_machine(void)
diff --git a/arch/arm/mach-mx28/mx28evk_pins.c b/arch/arm/mach-mx28/mx28evk_pins.c
index 7199c718f464..b8f98a20b51d 100644
--- a/arch/arm/mach-mx28/mx28evk_pins.c
+++ b/arch/arm/mach-mx28/mx28evk_pins.c
@@ -672,6 +672,28 @@ static struct pin_desc mx28evk_fixed_pins[] = {
 	 .drive	= 1,
 	 },
 #endif
+#if defined(CONFIG_LEDS_MXS) || defined(CONFIG_LEDS_MXS_MODULE)
+	{
+	 .name = "LEDS_PWM0",
+	 .id = PINID_AUART1_RX,
+	 .fun           = PIN_FUN3,
+	 .strength      = PAD_8MA,
+	 .voltage       = PAD_3_3V,
+	 .pullup        = 1,
+	 .drive         = 1,
+	 .pull          = 1,
+	 },
+	{
+	 .name = "LEDS_PWM1",
+	 .id = PINID_AUART1_TX,
+	 .fun           = PIN_FUN3,
+	 .strength      = PAD_8MA,
+	 .voltage       = PAD_3_3V,
+	 .pullup        = 1,
+	 .drive         = 1,
+	 .pull          = 1,
+	 },
+#endif
 };
 
 #if defined(CONFIG_FEC) || defined(CONFIG_FEC_MODULE)
diff --git a/arch/arm/plat-mxs/Kconfig b/arch/arm/plat-mxs/Kconfig
index 6c02d308f173..befd404a3f11 100644
--- a/arch/arm/plat-mxs/Kconfig
+++ b/arch/arm/plat-mxs/Kconfig
@@ -52,6 +52,12 @@ config MXS_LRADC
 	help
 	  Enable LRADC support
 
+config MXS_PWM_CHANNELS
+	int
+	default 8
+	help
+	  The number of pwm channel on Freescale MXS platform.
+
 menu "Freescale Application UART:"
 
 config MXS_AUART_DMA_SUPPORT
diff --git a/arch/arm/plat-mxs/device.c b/arch/arm/plat-mxs/device.c
index 165d3e0ad462..ae42a711057f 100644
--- a/arch/arm/plat-mxs/device.c
+++ b/arch/arm/plat-mxs/device.c
@@ -118,7 +118,7 @@ static struct platform_device mxs_i2c[] = {
 	 .name	= "mxs-i2c",
 	 .id	= 0,
 	 .dev = {
-		.dma_mask               = &common_dmamask,
+		.dma_mask	       = &common_dmamask,
 		.coherent_dma_mask      = DMA_BIT_MASK(32),
 		.release = mxs_nop_release,
 		},
@@ -129,7 +129,7 @@ static struct platform_device mxs_i2c[] = {
 	 .name	= "mxs-i2c",
 	 .id	= 1,
 	 .dev = {
-		.dma_mask               = &common_dmamask,
+		.dma_mask	       = &common_dmamask,
 		.coherent_dma_mask      = DMA_BIT_MASK(32),
 		.release = mxs_nop_release,
 		},
@@ -145,7 +145,7 @@ static struct platform_device mxs_mmc[] = {
 	 .name	= "mxs-mmc",
 	 .id	= 0,
 	 .dev = {
-		.dma_mask               = &common_dmamask,
+		.dma_mask	       = &common_dmamask,
 		.coherent_dma_mask      = DMA_BIT_MASK(32),
 		.release = mxs_nop_release,
 		},
@@ -154,7 +154,7 @@ static struct platform_device mxs_mmc[] = {
 	 .name	= "mxs-mmc",
 	 .id	= 1,
 	 .dev = {
-		.dma_mask               = &common_dmamask,
+		.dma_mask	       = &common_dmamask,
 		.coherent_dma_mask      = DMA_BIT_MASK(32),
 		.release = mxs_nop_release,
 		},
@@ -190,7 +190,7 @@ static struct platform_device mxs_fb = {
 	.name	= "mxs-fb",
 	.id	= 0,
 	.dev = {
-		.dma_mask               = &common_dmamask,
+		.dma_mask	       = &common_dmamask,
 		.coherent_dma_mask      = DMA_BIT_MASK(32),
 		.release = mxs_nop_release,
 		},
@@ -308,6 +308,16 @@ static struct platform_device mxs_auart[] = {
 };
 #endif
 
+#if defined(CONFIG_LEDS_MXS) || defined(CONFIG_LEDS_MXS_MODULE)
+static struct platform_device mxs_led = {
+	.name = "mxs-leds",
+	.id = 0,
+	.dev = {
+		 .release = mxs_nop_release,
+		 },
+};
+#endif
+
 static struct mxs_dev_lookup dev_lookup[] = {
 #if defined(CONFIG_SERIAL_MXS_DUART) || \
 	defined(CONFIG_SERIAL_MXS_DUART_MODULE)
@@ -413,6 +423,14 @@ static struct mxs_dev_lookup dev_lookup[] = {
 	 .pdev = mxs_auart,
 	 },
 #endif
+
+#if defined(CONFIG_LEDS_MXS) || defined(CONFIG_LEDS_MXS_MODULE)
+	{
+	 .name = "mxs-leds",
+	 .size = 1,
+	 .pdev = &mxs_led,
+	 },
+#endif
 };
 
 struct platform_device *mxs_get_device(char *name, int id)
diff --git a/arch/arm/plat-mxs/include/mach/device.h b/arch/arm/plat-mxs/include/mach/device.h
index a8b59a3a6c81..aaf61bfe067a 100644
--- a/arch/arm/plat-mxs/include/mach/device.h
+++ b/arch/arm/plat-mxs/include/mach/device.h
@@ -23,6 +23,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
+#include <linux/leds.h>
 
 #include <asm/mach/time.h>
 
@@ -94,6 +95,17 @@ struct mxs_auart_plat_data {
 	const char *clk;
 };
 
+struct mxs_pwm_led {
+	struct led_classdev dev;
+	const char *name;
+	unsigned int pwm;
+};
+
+struct mxs_pwm_leds_plat_data {
+	unsigned int num;
+	struct mxs_pwm_led *leds;
+};
+
 extern void mxs_timer_init(struct mxs_sys_timer *timer);
 
 extern void mxs_nop_release(struct device *dev);