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133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
/*
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* linux/drivers/leds/leds-ar7.c
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*
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* Copyright (C) 2007 OpenWrt.org
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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 <linux/err.h>
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#include <asm/io.h>
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#include <gpio.h>
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#define DRVNAME "ar7-leds"
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#define LONGNAME "TI AR7 LEDs driver"
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#define AR7_GPIO_BIT_STATUS_LED 8
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MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
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MODULE_DESCRIPTION(LONGNAME);
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MODULE_LICENSE("GPL");
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static void ar7_status_led_set(struct led_classdev *pled,
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enum led_brightness value)
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{
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gpio_set_value(AR7_GPIO_BIT_STATUS_LED, value ? 0 : 1);
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}
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static struct led_classdev ar7_status_led = {
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.name = "ar7:status",
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.brightness_set = ar7_status_led_set,
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};
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#ifdef CONFIG_PM
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static int ar7_leds_suspend(struct platform_device *dev,
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pm_message_t state)
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{
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led_classdev_suspend(&ar7_status_led);
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return 0;
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}
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static int ar7_leds_resume(struct platform_device *dev)
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{
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led_classdev_resume(&ar7_status_led);
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return 0;
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}
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#else /* CONFIG_PM */
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#define ar7_leds_suspend NULL
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#define ar7_leds_resume NULL
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#endif /* CONFIG_PM */
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static int ar7_leds_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, &ar7_status_led);
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if (rc < 0 )
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goto out;
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ar7_gpio_enable(AR7_GPIO_BIT_STATUS_LED);
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gpio_direction_output(AR7_GPIO_BIT_STATUS_LED);
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out:
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return rc;
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}
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static int ar7_leds_remove(struct platform_device *pdev)
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{
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led_classdev_unregister(&ar7_status_led);
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return 0;
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}
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static struct platform_device *ar7_leds_device;
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static struct platform_driver ar7_leds_driver = {
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.probe = ar7_leds_probe,
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.remove = ar7_leds_remove,
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.suspend = ar7_leds_suspend,
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.resume = ar7_leds_resume,
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.driver = {
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.name = DRVNAME,
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},
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};
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static int __init ar7_leds_init(void)
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{
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int rc;
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ar7_leds_device = platform_device_alloc(DRVNAME, -1);
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if (!ar7_leds_device)
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return -ENOMEM;
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rc = platform_device_add(ar7_leds_device);
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if (rc < 0)
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goto out_put;
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rc = platform_driver_register(&ar7_leds_driver);
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if (rc < 0)
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goto out_put;
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goto out;
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out_put:
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platform_device_put(ar7_leds_device);
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out:
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return rc;
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}
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static void __exit ar7_leds_exit(void)
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{
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platform_driver_unregister(&ar7_leds_driver);
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platform_device_unregister(ar7_leds_device);
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}
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module_init(ar7_leds_init);
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module_exit(ar7_leds_exit);
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