6c152beefb
As discussed on LKML some notion of 'function' is needed in LED naming. This patch adds this to the documentation and standardises existing LED drivers. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
161 lines
3.4 KiB
C
161 lines
3.4 KiB
C
/*
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* LEDs driver for Amstrad Delta (E3)
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*
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* Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
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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 as
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* published by the Free Software Foundation.
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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 <asm/arch/board-ams-delta.h>
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/*
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* Our context
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*/
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struct ams_delta_led {
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struct led_classdev cdev;
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u8 bitmask;
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};
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static void ams_delta_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct ams_delta_led *led_dev =
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container_of(led_cdev, struct ams_delta_led, cdev);
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if (value)
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ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
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else
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ams_delta_latch1_write(led_dev->bitmask, 0);
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}
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static struct ams_delta_led ams_delta_leds[] = {
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{
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.cdev = {
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.name = "ams-delta::camera",
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.brightness_set = ams_delta_led_set,
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},
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.bitmask = AMS_DELTA_LATCH1_LED_CAMERA,
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},
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{
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.cdev = {
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.name = "ams-delta::advert",
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.brightness_set = ams_delta_led_set,
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},
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.bitmask = AMS_DELTA_LATCH1_LED_ADVERT,
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},
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{
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.cdev = {
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.name = "ams-delta::email",
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.brightness_set = ams_delta_led_set,
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},
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.bitmask = AMS_DELTA_LATCH1_LED_EMAIL,
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},
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{
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.cdev = {
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.name = "ams-delta::handsfree",
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.brightness_set = ams_delta_led_set,
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},
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.bitmask = AMS_DELTA_LATCH1_LED_HANDSFREE,
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},
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{
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.cdev = {
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.name = "ams-delta::voicemail",
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.brightness_set = ams_delta_led_set,
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},
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.bitmask = AMS_DELTA_LATCH1_LED_VOICEMAIL,
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},
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{
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.cdev = {
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.name = "ams-delta::voice",
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.brightness_set = ams_delta_led_set,
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},
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.bitmask = AMS_DELTA_LATCH1_LED_VOICE,
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},
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};
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#ifdef CONFIG_PM
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static int ams_delta_led_suspend(struct platform_device *dev,
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pm_message_t state)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
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led_classdev_suspend(&ams_delta_leds[i].cdev);
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return 0;
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}
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static int ams_delta_led_resume(struct platform_device *dev)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
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led_classdev_resume(&ams_delta_leds[i].cdev);
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return 0;
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}
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#else
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#define ams_delta_led_suspend NULL
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#define ams_delta_led_resume NULL
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#endif
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static int ams_delta_led_probe(struct platform_device *pdev)
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{
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int i;
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int ret;
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for (i = ret = 0; ret >= 0 && i < ARRAY_SIZE(ams_delta_leds); i++) {
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ret = led_classdev_register(&pdev->dev,
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&ams_delta_leds[i].cdev);
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}
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if (ret < 0 && i > 1) {
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for (i = i - 2; i >= 0; i--)
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led_classdev_unregister(&ams_delta_leds[i].cdev);
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}
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return ret;
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}
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static int ams_delta_led_remove(struct platform_device *pdev)
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{
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int i;
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for (i = ARRAY_SIZE(ams_delta_leds) - 1; i >= 0; i--)
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led_classdev_unregister(&ams_delta_leds[i].cdev);
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return 0;
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}
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static struct platform_driver ams_delta_led_driver = {
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.probe = ams_delta_led_probe,
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.remove = ams_delta_led_remove,
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.suspend = ams_delta_led_suspend,
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.resume = ams_delta_led_resume,
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.driver = {
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.name = "ams-delta-led",
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},
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};
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static int __init ams_delta_led_init(void)
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{
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return platform_driver_register(&ams_delta_led_driver);
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}
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static void __exit ams_delta_led_exit(void)
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{
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return platform_driver_unregister(&ams_delta_led_driver);
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}
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module_init(ams_delta_led_init);
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module_exit(ams_delta_led_exit);
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MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
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MODULE_DESCRIPTION("Amstrad Delta LED driver");
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MODULE_LICENSE("GPL");
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