leds: leds-gpio for ngw100

Add GPIO leds to the NGW100 platform and its defconfig.
Access through /sys/class/leds/{a,b,sys}/* files; one
defaults to a heartbeat.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 31 insertions, 0 deletions

diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index 6c4dc0a00e9f..2edcecdea8bd 100644
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/arch/avr32/boards/atngw100/setup.c
@@ -13,6 +13,7 @@
 #include <linux/linkage.h>
 #include <linux/platform_device.h>
 #include <linux/types.h>
+#include <linux/leds.h>
 #include <linux/spi/spi.h>
 
 #include <asm/io.h>
@@ -21,6 +22,7 @@
 #include <asm/arch/at32ap7000.h>
 #include <asm/arch/board.h>
 #include <asm/arch/init.h>
+#include <asm/arch/portmux.h>
 
 /* Initialized by bootloader-specific startup code. */
 struct tag *bootloader_tags __initdata;
@@ -100,8 +102,31 @@ void __init setup_board(void)
         at32_setup_serial_console(0);
 }
 
+static const struct gpio_led ngw_leds[] = {
+        { .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
+                .default_trigger = "heartbeat",
+        },
+        { .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
+        { .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
+};
+
+static const struct gpio_led_platform_data ngw_led_data = {
+        .num_leds =     ARRAY_SIZE(ngw_leds),
+        .leds =         (void *) ngw_leds,
+};
+
+static struct platform_device ngw_gpio_leds = {
+        .name =         "leds-gpio",
+        .id =           -1,
+        .dev = {
+                .platform_data = (void *) &ngw_led_data,
+        }
+};
+
 static int __init atngw100_init(void)
 {
+        unsigned        i;
+
         /*
          * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
          * reserve any pins for it.
@@ -116,6 +141,12 @@ static int __init atngw100_init(void)
 
         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 
+        for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
+                at32_select_gpio(ngw_leds[i].gpio,
+                                AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+        }
+        platform_device_register(&ngw_gpio_leds);
+
         return 0;
 }
 postcore_initcall(atngw100_init);