Add support for the i.MX53 QSB2.6.35.3-mx53-early-201103141049

This patch seems to have originated from the 11.01.00 release
from Freescale, which is no longer available except through the
gitweb interface from Freescale.

http://opensource.freescale.com/git?p=imx/linux-2.6-imx.git;a=commit;h=27fdf7bae11978d21e8aba09bb635f49b07edd4a

1 files changed, 153 insertions, 0 deletions

diff --git a/drivers/leds/leds-mc13892.c b/drivers/leds/leds-mc13892.c
new file mode 100644
index 000000000000..ec7ae4316b4d
--- /dev/null
+++ b/drivers/leds/leds-mc13892.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/pmic_light.h>
+
+static void mc13892_led_set(struct led_classdev *led_cdev,
+			    enum led_brightness value)
+{
+	struct platform_device *dev = to_platform_device(led_cdev->dev->parent);
+	int led_ch;
+
+	switch (dev->id) {
+	case 'r':
+		led_ch = LIT_RED;
+		break;
+	case 'g':
+		led_ch = LIT_GREEN;
+		break;
+	case 'b':
+		led_ch = LIT_BLUE;
+		break;
+	default:
+		return;
+	}
+
+	/* set current with medium value, in case current is too large */
+	mc13892_bklit_set_current(led_ch, LIT_CURR_12);
+	/* max duty cycle is 63, brightness needs to be divided by 4 */
+	mc13892_bklit_set_dutycycle(led_ch, value / 4);
+
+}
+
+static int mc13892_led_remove(struct platform_device *dev)
+{
+	struct led_classdev *led_cdev = platform_get_drvdata(dev);
+
+	led_classdev_unregister(led_cdev);
+	kfree(led_cdev->name);
+	kfree(led_cdev);
+
+	return 0;
+}
+
+#define LED_NAME_LEN	16
+
+static int mc13892_led_probe(struct platform_device *dev)
+{
+	int ret;
+	struct led_classdev *led_cdev;
+	char *name;
+
+	led_cdev = kzalloc(sizeof(struct led_classdev), GFP_KERNEL);
+	if (led_cdev == NULL) {
+		dev_err(&dev->dev, "No memory for device\n");
+		return -ENOMEM;
+	}
+	name = kzalloc(LED_NAME_LEN, GFP_KERNEL);
+	if (name == NULL) {
+		dev_err(&dev->dev, "No memory for device\n");
+		ret = -ENOMEM;
+		goto exit_err;
+	}
+
+	strcpy(name, dev->name);
+	ret = strlen(dev->name);
+	if (ret > LED_NAME_LEN - 2) {
+		dev_err(&dev->dev, "led name is too long\n");
+		goto exit_err1;
+	}
+	name[ret] = dev->id;
+	name[ret + 1] = '\0';
+	led_cdev->name = name;
+	led_cdev->brightness_set = mc13892_led_set;
+
+	ret = led_classdev_register(&dev->dev, led_cdev);
+	if (ret < 0) {
+		dev_err(&dev->dev, "led_classdev_register failed\n");
+		goto exit_err1;
+	}
+
+	platform_set_drvdata(dev, led_cdev);
+
+	return 0;
+      exit_err1:
+	kfree(led_cdev->name);
+      exit_err:
+	kfree(led_cdev);
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static int mc13892_led_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct led_classdev *led_cdev = platform_get_drvdata(dev);
+
+	led_classdev_suspend(led_cdev);
+	return 0;
+}
+
+static int mc13892_led_resume(struct platform_device *dev)
+{
+	struct led_classdev *led_cdev = platform_get_drvdata(dev);
+
+	led_classdev_resume(led_cdev);
+	return 0;
+}
+#else
+#define mc13892_led_suspend NULL
+#define mc13892_led_resume NULL
+#endif
+
+static struct platform_driver mc13892_led_driver = {
+	.probe = mc13892_led_probe,
+	.remove = mc13892_led_remove,
+	.suspend = mc13892_led_suspend,
+	.resume = mc13892_led_resume,
+	.driver = {
+		   .name = "pmic_leds",
+		   .owner = THIS_MODULE,
+		   },
+};
+
+static int __init mc13892_led_init(void)
+{
+	return platform_driver_register(&mc13892_led_driver);
+}
+
+static void __exit mc13892_led_exit(void)
+{
+	platform_driver_unregister(&mc13892_led_driver);
+}
+
+module_init(mc13892_led_init);
+module_exit(mc13892_led_exit);
+
+MODULE_DESCRIPTION("Led driver for PMIC mc13892");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");