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/

5 files changed, 89 insertions, 1 deletions

diff --git a/arch/mips/bcm47xx/Kconfig b/arch/mips/bcm47xx/Kconfig
index df549af380af..09cb6f7aa3db 100644
--- a/arch/mips/bcm47xx/Kconfig
+++ b/arch/mips/bcm47xx/Kconfig
@@ -12,6 +12,7 @@ config BCM47XX_SSB
         select SSB_PCICORE_HOSTMODE if PCI
         select SSB_DRIVER_GPIO
         select GPIOLIB
+        select LEDS_GPIO_REGISTER
         default y
         help
          Add support for old Broadcom BCM47xx boards with Sonics Silicon Backplane support.
@@ -29,6 +30,7 @@ config BCM47XX_BCMA
         select BCMA_DRIVER_PCI_HOSTMODE if PCI
         select BCMA_DRIVER_GPIO
         select GPIOLIB
+        select LEDS_GPIO_REGISTER
         default y
         help
          Add support for new Broadcom BCM47xx boards with Broadcom specific Advanced Microcontroller Bus.
diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile
index c52daf9b05c6..84e9aed25027 100644
--- a/arch/mips/bcm47xx/Makefile
+++ b/arch/mips/bcm47xx/Makefile
@@ -4,5 +4,5 @@
 #
 
 obj-y                           += irq.o nvram.o prom.o serial.o setup.o time.o sprom.o
-obj-y                           += board.o
+obj-y                           += board.o leds.o
 obj-$(CONFIG_BCM47XX_SSB)       += wgt634u.o
diff --git a/arch/mips/bcm47xx/bcm47xx_private.h b/arch/mips/bcm47xx/bcm47xx_private.h
new file mode 100644
index 000000000000..1a1e600b74e6
--- /dev/null
+++ b/arch/mips/bcm47xx/bcm47xx_private.h
@@ -0,0 +1,9 @@
+#ifndef LINUX_BCM47XX_PRIVATE_H_
+#define LINUX_BCM47XX_PRIVATE_H_
+
+#include <linux/kernel.h>
+
+/* leds.c */
+void __init bcm47xx_leds_register(void);
+
+#endif
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);
+}
diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
index aa2d8e39a9b0..91166967f8f7 100644
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -26,6 +26,8 @@
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include "bcm47xx_private.h"
+
 #include <linux/export.h>
 #include <linux/types.h>
 #include <linux/ssb/ssb.h>
@@ -253,6 +255,8 @@ static int __init bcm47xx_register_bus_complete(void)
                 break;
 #endif
         }
+        bcm47xx_leds_register();
+
         return 0;
 }
 device_initcall(bcm47xx_register_bus_complete);