leds: Add LED driver for the Soekris net5501 board

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>

1 files changed, 94 insertions, 0 deletions

diff --git a/drivers/leds/leds-net5501.c b/drivers/leds/leds-net5501.c
new file mode 100644
index 000000000000..3063f591f0dc
--- /dev/null
+++ b/drivers/leds/leds-net5501.c
@@ -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);