MIPS: BCM47XX: Prepare support for LEDs

So far this is mostly just a proof of concept, database consists of a
single device. Creating a nice iterateable array wasn't an option
because devices have different amount of LEDs. And we don't want to
waste memory just because of support for a device with dozens on LEDs.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6299/

1 files changed, 73 insertions, 0 deletions

diff --git a/arch/mips/bcm47xx/leds.c b/arch/mips/bcm47xx/leds.c
new file mode 100644
index 000000000000..6a49d4c6c9c3
--- /dev/null
+++ b/arch/mips/bcm47xx/leds.c
@@ -0,0 +1,73 @@
+#include "bcm47xx_private.h"
+
+#include <linux/leds.h>
+#include <bcm47xx_board.h>
+
+static const struct gpio_led
+bcm47xx_leds_netgear_wndr4500_v1_leds[] __initconst = {
+        {
+                .name           = "bcm47xx:green:wps",
+                .gpio           = 1,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+        {
+                .name           = "bcm47xx:green:power",
+                .gpio           = 2,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+        {
+                .name           = "bcm47xx:orange:power",
+                .gpio           = 3,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+        {
+                .name           = "bcm47xx:green:usb1",
+                .gpio           = 8,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+        {
+                .name           = "bcm47xx:green:2ghz",
+                .gpio           = 9,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+        {
+                .name           = "bcm47xx:blue:5ghz",
+                .gpio           = 11,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+        {
+                .name           = "bcm47xx:green:usb2",
+                .gpio           = 14,
+                .active_low     = 1,
+                .default_state  = LEDS_GPIO_DEFSTATE_KEEP,
+        },
+};
+
+static struct gpio_led_platform_data bcm47xx_leds_pdata;
+
+#define bcm47xx_set_pdata(dev_leds) do {                                \
+        bcm47xx_leds_pdata.leds = dev_leds;                             \
+        bcm47xx_leds_pdata.num_leds = ARRAY_SIZE(dev_leds);             \
+} while (0)
+
+void __init bcm47xx_leds_register(void)
+{
+        enum bcm47xx_board board = bcm47xx_board_get();
+
+        switch (board) {
+        case BCM47XX_BOARD_NETGEAR_WNDR4500V1:
+                bcm47xx_set_pdata(bcm47xx_leds_netgear_wndr4500_v1_leds);
+                break;
+        default:
+                pr_debug("No LEDs configuration found for this device\n");
+                return;
+        }
+
+        gpio_led_register_device(-1, &bcm47xx_leds_pdata);
+}