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[PATCH -mm][MIPS] GPIO LED driver for the WGT634U machine

To: Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH -mm][MIPS] GPIO LED driver for the WGT634U machine
From: Aurelien Jarno <aurelien@aurel32.net>
Date: Wed, 15 Aug 2007 13:25:07 +0200
Cc: linux-mips@linux-mips.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.13 (2006-08-11)
The patch below adds GPIO support to the BCM947xx platform. It uses
the new gpio-led driver and a platform driver for the pin definitions.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

--- a/arch/mips/bcm947xx/Makefile
+++ b/arch/mips/bcm947xx/Makefile
@@ -3,4 +3,4 @@
 # under Linux.
 #

-obj-y := irq.o prom.o serial.o setup.o time.o
+obj-y := irq.o prom.o serial.o setup.o time.o wgt634u.o
--- a/arch/mips/bcm947xx/wgt634u.c
+++ b/arch/mips/bcm947xx/wgt634u.c
@@ -0,0 +1,64 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/ssb/ssb.h>
+#include <asm/mach-bcm947xx/bcm947xx.h>
+
+/* GPIO definitions for the WGT634U */
+#define WGT634U_GPIO_LED       3
+#define WGT634U_GPIO_RESET     2
+#define WGT634U_GPIO_TP1       7
+#define WGT634U_GPIO_TP2       6
+#define WGT634U_GPIO_TP3       5
+#define WGT634U_GPIO_TP4       4
+#define WGT634U_GPIO_TP5       1
+
+static const struct gpio_led wgt634u_leds[] = {
+       {
+               .name = "power",
+               .gpio = WGT634U_GPIO_LED,
+               .active_low = 1,
+               .default_trigger = "heartbeat",
+       },
+};
+
+static const struct gpio_led_platform_data wgt634u_led_data = {
+       .num_leds =     ARRAY_SIZE(wgt634u_leds),
+       .leds =         (void *) wgt634u_leds,
+};
+
+static struct platform_device wgt634u_gpio_leds = {
+       .name =         "leds-gpio",
+       .id =           -1,
+       .dev = {
+               .platform_data = (void *) &wgt634u_led_data,
+       }
+};
+
+static int __init wgt634u_init(void)
+{
+       /* There is no easy way to detect that we are running on a WGT634U
+        * machine. Use the MAC address as an heuristic. Netgear Inc. has
+        * been allocated ranges 00:09:5b:xx:xx:xx and 00:0f:b5:xx:xx:xx.
+        */
+
+       u8 *et0mac = ssb_bcm947xx.sprom.r1.et0mac;
+
+       if (et0mac[0] == 0x00 &&
+           ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) ||
+            (et0mac[1] == 0x0f && et0mac[2] == 0xb5)))
+               return platform_device_register(&wgt634u_gpio_leds);
+       else
+               return -ENODEV;
+}
+
+module_init(wgt634u_init);
+

-- 
  .''`.  Aurelien Jarno             | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net

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