leds: Add LED driver for the Soekris net5501 board
Bjarke Istrup Pedersen [Mon, 24 May 2010 19:15:56 +0000 (12:15 -0700)]
It is based on the previously submitted code by Alessandro Zummo, but is
changed to use the new GPIO driver with 2.6.33, and the driver has been
moved to drivers/leds where it belongs.

[akpm@linux-foundation.org: coding-style fixes]
[randy.dunlap@oracle.com: fix net5501 kconfig]
Signed-off-by: Bjarke Istrup Pedersen <gurligebis@gentoo.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

drivers/leds/Kconfig
drivers/leds/Makefile
drivers/leds/leds-net5501.c [new file with mode: 0644]

index 505eb64..ecb6932 100644 (file)
@@ -67,6 +67,16 @@ config LEDS_NET48XX
          This option enables support for the Soekris net4801 and net4826 error
          LED.
 
+config LEDS_NET5501
+       tristate "LED Support for Soekris net5501 series Error LED"
+       depends on LEDS_CLASS && LEDS_TRIGGERS
+       depends on LEDS_GPIO_PLATFORM && GPIO_CS5535
+       select LEDS_TRIGGER_DEFAULT_ON
+       default n
+       help
+         Add support for the Soekris net5501 board (detection, error led
+         and GPIO).
+
 config LEDS_FSG
        tristate "LED Support for the Freecom FSG-3"
        depends on MACH_FSG
index 0cd8b99..77119f2 100644 (file)
@@ -13,6 +13,7 @@ obj-$(CONFIG_LEDS_MIKROTIK_RB532)     += leds-rb532.o
 obj-$(CONFIG_LEDS_S3C24XX)             += leds-s3c24xx.o
 obj-$(CONFIG_LEDS_AMS_DELTA)           += leds-ams-delta.o
 obj-$(CONFIG_LEDS_NET48XX)             += leds-net48xx.o
+obj-$(CONFIG_LEDS_NET5501)             += leds-net5501.o
 obj-$(CONFIG_LEDS_WRAP)                        += leds-wrap.o
 obj-$(CONFIG_LEDS_ALIX2)               += leds-alix2.o
 obj-$(CONFIG_LEDS_H1940)               += leds-h1940.o
diff --git a/drivers/leds/leds-net5501.c b/drivers/leds/leds-net5501.c
new file mode 100644 (file)
index 0000000..3063f59
--- /dev/null
@@ -0,0 +1,94 @@
+/*
+ * Soekris board support code
+ *
+ * Copyright (C) 2008-2009 Tower Technologies
+ * Written by Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/string.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <asm/geode.h>
+
+static struct gpio_led net5501_leds[] = {
+       {
+               .name = "error",
+               .gpio = 6,
+               .default_trigger = "default-on",
+       },
+};
+
+static struct gpio_led_platform_data net5501_leds_data = {
+       .num_leds = ARRAY_SIZE(net5501_leds),
+       .leds = net5501_leds,
+};
+
+static struct platform_device net5501_leds_dev = {
+       .name = "leds-gpio",
+       .id = -1,
+       .dev.platform_data = &net5501_leds_data,
+};
+
+static void __init init_net5501(void)
+{
+       platform_device_register(&net5501_leds_dev);
+}
+
+struct soekris_board {
+       u16     offset;
+       char    *sig;
+       u8      len;
+       void    (*init)(void);
+};
+
+static struct soekris_board __initdata boards[] = {
+       { 0xb7b, "net5501", 7, init_net5501 },  /* net5501 v1.33/1.33c */
+       { 0xb1f, "net5501", 7, init_net5501 },  /* net5501 v1.32i */
+};
+
+static int __init soekris_init(void)
+{
+       int i;
+       unsigned char *rombase, *bios;
+
+       if (!is_geode())
+               return 0;
+
+       rombase = ioremap(0xffff0000, 0xffff);
+       if (!rombase) {
+               printk(KERN_INFO "Soekris net5501 LED driver failed to get rombase");
+               return 0;
+       }
+
+       bios = rombase + 0x20;  /* null terminated */
+
+       if (strncmp(bios, "comBIOS", 7))
+               goto unmap;
+
+       for (i = 0; i < ARRAY_SIZE(boards); i++) {
+               unsigned char *model = rombase + boards[i].offset;
+
+               if (strncmp(model, boards[i].sig, boards[i].len) == 0) {
+                       printk(KERN_INFO "Soekris %s: %s\n", model, bios);
+
+                       if (boards[i].init)
+                               boards[i].init();
+                       break;
+               }
+       }
+
+unmap:
+       iounmap(rombase);
+       return 0;
+}
+
+arch_initcall(soekris_init);