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53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* ADM5120 LED (GPIO) driver
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*
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* Copyright (C) Jeroen Vreeken (pe1rxq@amsat.org), 2005
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* Copyright (C) OpenWrt.org, Florian Fainelli <florian@openwrt.org>, 2007
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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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#define GPIO_IO ((unsigned long *)0xb20000b8)
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static void adm5120_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
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{
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if (brightness)
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*GPIO_IO=(*GPIO_IO & 0x00ffffff) | (brightness << 24);
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else
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*GPIO_IO=(*GPIO_IO & 0x00ffffff) | (0 << 24);
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}
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static struct led_classdev adm5120_gpio_led = {
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.name = "adm5120:led",
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.brightness_set = adm5120_led_set,
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};
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static int __init adm5120_led_init(void)
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{
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int ret = led_classdev_register(NULL, &adm5120_gpio_led);
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if (ret < 0)
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printk(KERN_WARNING "adm5120: unable to register LED device\n");
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return ret;
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}
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static void __exit adm5120_led_exit(void)
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{
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led_classdev_unregister(&adm5120_gpio_led);
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}
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module_init(adm5120_led_init);
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module_exit(adm5120_led_exit);
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MODULE_DESCRIPTION("ADM5120 LED driver");
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MODULE_AUTHOR("Jeroen Vreeken, OpenWrt.org");
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MODULE_LICENSE("GPL");
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