mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
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/*
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* linux/drivers/leds/locomo.c
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*
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* Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
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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/config.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/leds.h>
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#include <asm/hardware.h>
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#include <asm/hardware/locomo.h>
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static void locomoled_brightness_set(struct led_classdev *led_cdev,
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enum led_brightness value, int offset)
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{
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struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->class_dev->dev);
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unsigned long flags;
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local_irq_save(flags);
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if (value)
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locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
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else
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locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
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local_irq_restore(flags);
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}
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static void locomoled_brightness_set0(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
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}
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static void locomoled_brightness_set1(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
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}
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static struct led_classdev locomo_led0 = {
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.name = "locomo:amber",
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.brightness_set = locomoled_brightness_set0,
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};
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static struct led_classdev locomo_led1 = {
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.name = "locomo:green",
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.brightness_set = locomoled_brightness_set1,
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};
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static int locomoled_probe(struct locomo_dev *ldev)
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{
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int ret;
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ret = led_classdev_register(&ldev->dev, &locomo_led0);
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if (ret < 0)
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return ret;
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ret = led_classdev_register(&ldev->dev, &locomo_led1);
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if (ret < 0)
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led_classdev_unregister(&locomo_led0);
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return ret;
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}
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static int locomoled_remove(struct locomo_dev *dev)
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{
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led_classdev_unregister(&locomo_led0);
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led_classdev_unregister(&locomo_led1);
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return 0;
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}
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static struct locomo_driver locomoled_driver = {
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.drv = {
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.name = "locomoled"
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},
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.devid = LOCOMO_DEVID_LED,
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.probe = locomoled_probe,
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.remove = locomoled_remove,
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};
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static int __init locomoled_init(void)
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{
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return locomo_driver_register(&locomoled_driver);
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}
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module_init(locomoled_init);
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MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
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MODULE_DESCRIPTION("Locomo LED driver");
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MODULE_LICENSE("GPL");
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