LED driver for PCEngines ALIX boards

This patch adds a driver for the three LEDs that exists on the
PCEngines ALIX 2 and 3 series boards.

The driver is also added to the Alix profile.

Signed-off-by: Petr Liebman <petrliebman@gmail.com>

--

SVN-Revision: 9748

1 files changed, 172 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/files/drivers/leds/leds-alix.c b/target/linux/generic-2.6/files/drivers/leds/leds-alix.c
new file mode 100644
index 0000000..103ca7d
--- /dev/null
+++ b/target/linux/generic-2.6/files/drivers/leds/leds-alix.c
@@ -0,0 +1,172 @@
+/*
+ * LEDs driver for PCEngines ALIX 2/3 series
+ *
+ * Copyright (C) 2007 Petr Liebman
+ *
+ * Based on leds-wrap.c
+ *
+ * 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/platform_device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <asm/io.h>
+
+#define DRVNAME "alix-led"
+
+#define ALIX_LED1_PORT		(0x6100)
+#define ALIX_LED1_ON		(1<<22)
+#define ALIX_LED1_OFF		(1<<6)
+
+#define ALIX_LED2_PORT		(0x6180)
+#define ALIX_LED2_ON		(1<<25)
+#define ALIX_LED2_OFF		(1<<9)
+
+#define ALIX_LED3_PORT		(0x6180)
+#define ALIX_LED3_ON		(1<<27)
+#define ALIX_LED3_OFF		(1<<11)
+
+
+static struct platform_device *pdev;
+
+static void alix_led_set_1(struct led_classdev *led_cdev,
+		enum led_brightness value)
+{
+	if (value)
+		outl(ALIX_LED1_ON, ALIX_LED1_PORT);
+	else
+		outl(ALIX_LED1_OFF, ALIX_LED1_PORT);
+}
+
+static void alix_led_set_2(struct led_classdev *led_cdev,
+		enum led_brightness value)
+{
+	if (value)
+		outl(ALIX_LED2_ON, ALIX_LED2_PORT);
+	else
+		outl(ALIX_LED2_OFF, ALIX_LED2_PORT);
+}
+
+static void alix_led_set_3(struct led_classdev *led_cdev,
+		enum led_brightness value)
+{
+	if (value)
+		outl(ALIX_LED3_ON, ALIX_LED3_PORT);
+	else
+		outl(ALIX_LED3_OFF, ALIX_LED3_PORT);
+}
+
+static struct led_classdev alix_led_1 = {
+	.name		= "alix:1",
+	.brightness_set	= alix_led_set_1,
+};
+
+static struct led_classdev alix_led_2 = {
+	.name		= "alix:2",
+	.brightness_set	= alix_led_set_2,
+};
+
+static struct led_classdev alix_led_3 = {
+	.name		= "alix:3",
+	.brightness_set	= alix_led_set_3,
+};
+
+
+#ifdef CONFIG_PM
+static int alix_led_suspend(struct platform_device *dev,
+		pm_message_t state)
+{
+	led_classdev_suspend(&alix_led_1);
+	led_classdev_suspend(&alix_led_2);
+	led_classdev_suspend(&alix_led_3);
+	return 0;
+}
+
+static int alix_led_resume(struct platform_device *dev)
+{
+	led_classdev_resume(&alix_led_1);
+	led_classdev_resume(&alix_led_2);
+	led_classdev_resume(&alix_led_3);
+	return 0;
+}
+#else
+#define alix_led_suspend NULL
+#define alix_led_resume NULL
+#endif
+
+static int alix_led_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = led_classdev_register(&pdev->dev, &alix_led_1);
+	if (ret >= 0)
+	{
+		ret = led_classdev_register(&pdev->dev, &alix_led_2);
+		if (ret >= 0)
+		{
+			ret = led_classdev_register(&pdev->dev, &alix_led_3);
+			if (ret < 0)
+				led_classdev_unregister(&alix_led_2);
+		}
+		if (ret < 0)
+			led_classdev_unregister(&alix_led_1);
+	}
+	return ret;
+}
+
+static int alix_led_remove(struct platform_device *pdev)
+{
+	led_classdev_unregister(&alix_led_1);
+	led_classdev_unregister(&alix_led_2);
+	led_classdev_unregister(&alix_led_3);
+	return 0;
+}
+
+static struct platform_driver alix_led_driver = {
+	.probe		= alix_led_probe,
+	.remove		= alix_led_remove,
+	.suspend	= alix_led_suspend,
+	.resume		= alix_led_resume,
+	.driver		= {
+		.name		= DRVNAME,
+		.owner		= THIS_MODULE,
+	},
+};
+
+static int __init alix_led_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&alix_led_driver);
+	if (ret < 0)
+		goto out;
+
+	pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
+	if (IS_ERR(pdev)) {
+		ret = PTR_ERR(pdev);
+		platform_driver_unregister(&alix_led_driver);
+		goto out;
+	}
+
+out:
+	return ret;
+}
+
+static void __exit alix_led_exit(void)
+{
+	platform_device_unregister(pdev);
+	platform_driver_unregister(&alix_led_driver);
+}
+
+module_init(alix_led_init);
+module_exit(alix_led_exit);
+
+MODULE_AUTHOR("Petr Liebman");
+MODULE_DESCRIPTION("PCEngines ALIX LED driver");
+MODULE_LICENSE("GPL");
+