1 files changed, 127 insertions, 0 deletions

diff --git a/kernel/drivers/leds/leds-s3c24xx.c b/kernel/drivers/leds/leds-s3c24xx.c
new file mode 100644
index 000000000..83641a7b2
--- /dev/null
+++ b/kernel/drivers/leds/leds-s3c24xx.c
@@ -0,0 +1,127 @@
+/* drivers/leds/leds-s3c24xx.c
+ *
+ * (c) 2006 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX - LEDs GPIO driver
+ *
+ * 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/platform_device.h>
+#include <linux/leds.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_data/leds-s3c24xx.h>
+
+#include <mach/regs-gpio.h>
+#include <plat/gpio-cfg.h>
+
+/* our context */
+
+struct s3c24xx_gpio_led {
+	struct led_classdev		 cdev;
+	struct s3c24xx_led_platdata	*pdata;
+};
+
+static inline struct s3c24xx_gpio_led *pdev_to_gpio(struct platform_device *dev)
+{
+	return platform_get_drvdata(dev);
+}
+
+static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
+{
+	return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
+}
+
+static void s3c24xx_led_set(struct led_classdev *led_cdev,
+			    enum led_brightness value)
+{
+	struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
+	struct s3c24xx_led_platdata *pd = led->pdata;
+	int state = (value ? 1 : 0) ^ (pd->flags & S3C24XX_LEDF_ACTLOW);
+
+	/* there will be a short delay between setting the output and
+	 * going from output to input when using tristate. */
+
+	gpio_set_value(pd->gpio, state);
+
+	if (pd->flags & S3C24XX_LEDF_TRISTATE) {
+		if (value)
+			gpio_direction_output(pd->gpio, state);
+		else
+			gpio_direction_input(pd->gpio);
+	}
+}
+
+static int s3c24xx_led_remove(struct platform_device *dev)
+{
+	struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);
+
+	led_classdev_unregister(&led->cdev);
+
+	return 0;
+}
+
+static int s3c24xx_led_probe(struct platform_device *dev)
+{
+	struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);
+	struct s3c24xx_gpio_led *led;
+	int ret;
+
+	led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
+			   GFP_KERNEL);
+	if (!led)
+		return -ENOMEM;
+
+	platform_set_drvdata(dev, led);
+
+	led->cdev.brightness_set = s3c24xx_led_set;
+	led->cdev.default_trigger = pdata->def_trigger;
+	led->cdev.name = pdata->name;
+	led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+
+	led->pdata = pdata;
+
+	ret = devm_gpio_request(&dev->dev, pdata->gpio, "S3C24XX_LED");
+	if (ret < 0)
+		return ret;
+
+	/* no point in having a pull-up if we are always driving */
+
+	s3c_gpio_setpull(pdata->gpio, S3C_GPIO_PULL_NONE);
+
+	if (pdata->flags & S3C24XX_LEDF_TRISTATE)
+		gpio_direction_input(pdata->gpio);
+	else
+		gpio_direction_output(pdata->gpio,
+			pdata->flags & S3C24XX_LEDF_ACTLOW ? 1 : 0);
+
+	/* register our new led device */
+
+	ret = led_classdev_register(&dev->dev, &led->cdev);
+	if (ret < 0)
+		dev_err(&dev->dev, "led_classdev_register failed\n");
+
+	return ret;
+}
+
+static struct platform_driver s3c24xx_led_driver = {
+	.probe		= s3c24xx_led_probe,
+	.remove		= s3c24xx_led_remove,
+	.driver		= {
+		.name		= "s3c24xx_led",
+	},
+};
+
+module_platform_driver(s3c24xx_led_driver);
+
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_DESCRIPTION("S3C24XX LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c24xx_led");