From 2731b2eadeaa141e6f305fa8086106608112bbaa Mon Sep 17 00:00:00 2001 From: Roshni Shah Date: Mon, 14 Mar 2011 06:49:42 -0400 Subject: Add support for the i.MX53 QSB 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 --- drivers/leds/leds-mc13892.c | 153 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 drivers/leds/leds-mc13892.c (limited to 'drivers/leds/leds-mc13892.c') 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 +#include +#include +#include +#include +#include + +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"); -- cgit v1.2.3