ARM: mxs/mx28evk: add leds-gpio device for heartbeat

It adds LED2 on mx28evk board as heartbeat trigger for diagnostic
purpose.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 162b0b0bc356fa83d944aed3b10ff720028a5691..1d3985f37858fcdd645ff307b48638fb242250b9 100644 (file)
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -41,6 +41,7 @@ config MACH_MX23EVK
 config MACH_MX28EVK
        bool "Support MX28EVK Platform"
        select SOC_IMX28
+       select LEDS_GPIO_REGISTER
        select MXS_HAVE_AMBA_DUART
        select MXS_HAVE_PLATFORM_AUART
        select MXS_HAVE_PLATFORM_FEC

diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index eacdc6b0e70abeb497e542d1084031b0a3d5da07..492dffa2f6bd2fa27e62a80e6be10b7ffe1e4796 100644 (file)
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
+#include <linux/leds.h>
 #include <linux/irq.h>
 #include <linux/clk.h>
 
@@ -30,6 +31,7 @@
 
 #define MX28EVK_FLEXCAN_SWITCH MXS_GPIO_NR(2, 13)
 #define MX28EVK_FEC_PHY_POWER  MXS_GPIO_NR(2, 15)
+#define MX28EVK_GPIO_LED       MXS_GPIO_NR(3, 5)
 #define MX28EVK_BL_ENABLE      MXS_GPIO_NR(3, 18)
 #define MX28EVK_LCD_ENABLE     MXS_GPIO_NR(3, 30)
 #define MX28EVK_FEC_PHY_RESET  MXS_GPIO_NR(4, 13)
@@ -179,6 +181,23 @@ static const iomux_cfg_t mx28evk_pads[] __initconst = {
        /* slot power enable */
        MX28_PAD_PWM4__GPIO_3_29 |
                (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+
+       /* led */
+       MX28_PAD_AUART1_TX__GPIO_3_5 | MXS_PAD_CTRL,
+};
+
+/* led */
+static const struct gpio_led mx28evk_leds[] __initconst = {
+       {
+               .name = "GPIO-LED",
+               .default_trigger = "heartbeat",
+               .gpio = MX28EVK_GPIO_LED,
+       },
+};
+
+static const struct gpio_led_platform_data mx28evk_led_data __initconst = {
+       .leds = mx28evk_leds,
+       .num_leds = ARRAY_SIZE(mx28evk_leds),
 };
 
 /* fec */
@@ -386,6 +405,8 @@ static void __init mx28evk_init(void)
        if (ret)
                pr_warn("failed to request gpio mmc1-slot-power: %d\n", ret);
        mx28_add_mxs_mmc(1, &mx28evk_mmc_pdata[1]);
+
+       gpio_led_register_device(0, &mx28evk_led_data);
 }
 
 static void __init mx28evk_timer_init(void)