[AVR32] leds-gpio for stk1000

Add GPIO led support: J2 to either block of LEDs on the STK1000.

This uses the new LEDS_GPIO driver, and sets up a heartbeat trigger by
default ... either bright (!!) amber, or a more interesting purple.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

2 files changed, 88 insertions, 0 deletions

diff --git a/arch/avr32/boards/atstk1000/Kconfig b/arch/avr32/boards/atstk1000/Kconfig
index 71bc7d364fb7..718578f64069 100644
--- a/arch/avr32/boards/atstk1000/Kconfig
+++ b/arch/avr32/boards/atstk1000/Kconfig
@@ -50,4 +50,30 @@ config BOARD_ATSTK1002_SPI1
           GPIO lines and accessed through the J1 jumper block.  Say "y"
           here to configure that SPI controller.
 
+config BOARD_ATSTK1002_J2_LED
+        bool
+        default BOARD_ATSTK1002_J2_LED8 || BOARD_ATSTK1002_J2_RGB
+
+choice
+        prompt "LEDs connected to J2:"
+        depends on LEDS_GPIO && !BOARD_ATSTK1002_SW4_CUSTOM
+        optional
+        help
+          Select this if you have jumpered the J2 jumper block to the
+          LED0..LED7 amber leds, or to the RGB leds, using a ten-pin
+          IDC cable.  A default "heartbeat" trigger is provided, but
+          you can of course override this.
+
+config BOARD_ATSTK1002_J2_LED8
+        bool "LED0..LED7"
+        help
+          Select this if J2 is jumpered to LED0..LED7 amber leds.
+
+config BOARD_ATSTK1002_J2_RGB
+        bool "RGB leds"
+        help
+          Select this if J2 is jumpered to the RGB leds.
+
+endchoice
+
 endif   # stk 1002
diff --git a/arch/avr32/boards/atstk1000/atstk1002.c b/arch/avr32/boards/atstk1000/atstk1002.c
index cb93eabb9c6c..c9981b731efa 100644
--- a/arch/avr32/boards/atstk1000/atstk1002.c
+++ b/arch/avr32/boards/atstk1000/atstk1002.c
@@ -11,6 +11,7 @@
 #include <linux/etherdevice.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/leds.h>
 #include <linux/platform_device.h>
 #include <linux/string.h>
 #include <linux/types.h>
@@ -120,6 +121,65 @@ static void __init set_hw_addr(struct platform_device *pdev)
         clk_put(pclk);
 }
 
+#ifdef CONFIG_BOARD_ATSTK1002_J2_LED
+
+static struct gpio_led stk_j2_led[] = {
+#ifdef CONFIG_BOARD_ATSTK1002_J2_LED8
+#define LEDSTRING "J2 jumpered to LED8"
+        { .name = "led0:amber", .gpio = GPIO_PIN_PB( 8), },
+        { .name = "led1:amber", .gpio = GPIO_PIN_PB( 9), },
+        { .name = "led2:amber", .gpio = GPIO_PIN_PB(10), },
+        { .name = "led3:amber", .gpio = GPIO_PIN_PB(13), },
+        { .name = "led4:amber", .gpio = GPIO_PIN_PB(14), },
+        { .name = "led5:amber", .gpio = GPIO_PIN_PB(15), },
+        { .name = "led6:amber", .gpio = GPIO_PIN_PB(16), },
+        { .name = "led7:amber", .gpio = GPIO_PIN_PB(30),
+                        .default_trigger = "heartbeat", },
+#else   /* RGB */
+#define LEDSTRING "J2 jumpered to RGB LEDs"
+        { .name = "r1:red",     .gpio = GPIO_PIN_PB( 8), },
+        { .name = "g1:green",   .gpio = GPIO_PIN_PB(10), },
+        { .name = "b1:blue",    .gpio = GPIO_PIN_PB(14), },
+
+        { .name = "r2:red",     .gpio = GPIO_PIN_PB( 9),
+                        .default_trigger = "heartbeat", },
+        { .name = "g2:green",   .gpio = GPIO_PIN_PB(13), },
+        { .name = "b2:blue",    .gpio = GPIO_PIN_PB(15),
+                        .default_trigger = "heartbeat", },
+        /* PB16, PB30 unused */
+#endif
+};
+
+static struct gpio_led_platform_data stk_j2_led_data = {
+        .num_leds       = ARRAY_SIZE(stk_j2_led),
+        .leds           = stk_j2_led,
+};
+
+static struct platform_device stk_j2_led_dev = {
+        .name           = "leds-gpio",
+        .id             = 2,    /* gpio block J2 */
+        .dev            = {
+                .platform_data  = &stk_j2_led_data,
+        },
+};
+
+static void setup_j2_leds(void)
+{
+        unsigned        i;
+
+        for (i = 0; i < ARRAY_SIZE(stk_j2_led); i++)
+                at32_select_gpio(stk_j2_led[i].gpio, AT32_GPIOF_OUTPUT);
+
+        printk("STK1002: " LEDSTRING "\n");
+        platform_device_register(&stk_j2_led_dev);
+}
+
+#else
+static void setup_j2_leds(void)
+{
+}
+#endif
+
 void __init setup_board(void)
 {
 #ifdef  CONFIG_BOARD_ATSTK1002_SW2_CUSTOM
@@ -185,6 +245,8 @@ static int __init atstk1002_init(void)
         at32_add_device_ssc(0, ATMEL_SSC_TX);
 #endif
 
+        setup_j2_leds();
+
         return 0;
 }
 postcore_initcall(atstk1002_init);