106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
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/*
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* leds-msm-pmic.c - MSM PMIC LEDs driver.
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*
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* Copyright (c) 2009, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/leds.h>
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#include <mach/pmic.h>
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#define MAX_KEYPAD_BL_LEVEL 16
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static void msm_keypad_bl_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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int ret;
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ret = pmic_set_led_intensity(LED_KEYPAD, value / MAX_KEYPAD_BL_LEVEL);
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if (ret)
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dev_err(led_cdev->dev, "can't set keypad backlight\n");
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}
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static struct led_classdev msm_kp_bl_led = {
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.name = "keyboard-backlight",
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.brightness_set = msm_keypad_bl_led_set,
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.brightness = LED_OFF,
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};
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static int msm_pmic_led_probe(struct platform_device *pdev)
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{
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int rc;
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rc = led_classdev_register(&pdev->dev, &msm_kp_bl_led);
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if (rc) {
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dev_err(&pdev->dev, "unable to register led class driver\n");
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return rc;
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}
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msm_keypad_bl_led_set(&msm_kp_bl_led, LED_OFF);
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return rc;
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}
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static int __devexit msm_pmic_led_remove(struct platform_device *pdev)
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{
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led_classdev_unregister(&msm_kp_bl_led);
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return 0;
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}
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#ifdef CONFIG_PM
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static int msm_pmic_led_suspend(struct platform_device *dev,
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pm_message_t state)
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{
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led_classdev_suspend(&msm_kp_bl_led);
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return 0;
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}
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static int msm_pmic_led_resume(struct platform_device *dev)
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{
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led_classdev_resume(&msm_kp_bl_led);
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return 0;
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}
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#else
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#define msm_pmic_led_suspend NULL
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#define msm_pmic_led_resume NULL
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#endif
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static struct platform_driver msm_pmic_led_driver = {
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.probe = msm_pmic_led_probe,
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.remove = __devexit_p(msm_pmic_led_remove),
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.suspend = msm_pmic_led_suspend,
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.resume = msm_pmic_led_resume,
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.driver = {
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.name = "pmic-leds",
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.owner = THIS_MODULE,
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},
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};
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static int __init msm_pmic_led_init(void)
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{
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return platform_driver_register(&msm_pmic_led_driver);
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}
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module_init(msm_pmic_led_init);
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static void __exit msm_pmic_led_exit(void)
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{
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platform_driver_unregister(&msm_pmic_led_driver);
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}
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module_exit(msm_pmic_led_exit);
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MODULE_DESCRIPTION("MSM PMIC LEDs driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:pmic-leds");
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