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yaml --- r: 29054 b: refs/heads/master c: 9becde7 h: refs/heads/master v: v3
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Jonathan McDowell
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Linus Torvalds
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Jun 23, 2006
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/* | ||
* LEDs driver for Amstrad Delta (E3) | ||
* | ||
* Copyright (C) 2006 Jonathan McDowell <noodles@earth.li> | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License version 2 as | ||
* published by the Free Software Foundation. | ||
*/ | ||
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#include <linux/config.h> | ||
#include <linux/kernel.h> | ||
#include <linux/init.h> | ||
#include <linux/platform_device.h> | ||
#include <linux/leds.h> | ||
#include <asm/arch/board-ams-delta.h> | ||
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/* | ||
* Our context | ||
*/ | ||
struct ams_delta_led { | ||
struct led_classdev cdev; | ||
u8 bitmask; | ||
}; | ||
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static void ams_delta_led_set(struct led_classdev *led_cdev, | ||
enum led_brightness value) | ||
{ | ||
struct ams_delta_led *led_dev = | ||
container_of(led_cdev, struct ams_delta_led, cdev); | ||
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if (value) | ||
ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask); | ||
else | ||
ams_delta_latch1_write(led_dev->bitmask, 0); | ||
} | ||
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static struct ams_delta_led ams_delta_leds[] = { | ||
{ | ||
.cdev = { | ||
.name = "ams-delta:camera", | ||
.brightness_set = ams_delta_led_set, | ||
}, | ||
.bitmask = AMS_DELTA_LATCH1_LED_CAMERA, | ||
}, | ||
{ | ||
.cdev = { | ||
.name = "ams-delta:advert", | ||
.brightness_set = ams_delta_led_set, | ||
}, | ||
.bitmask = AMS_DELTA_LATCH1_LED_ADVERT, | ||
}, | ||
{ | ||
.cdev = { | ||
.name = "ams-delta:email", | ||
.brightness_set = ams_delta_led_set, | ||
}, | ||
.bitmask = AMS_DELTA_LATCH1_LED_EMAIL, | ||
}, | ||
{ | ||
.cdev = { | ||
.name = "ams-delta:handsfree", | ||
.brightness_set = ams_delta_led_set, | ||
}, | ||
.bitmask = AMS_DELTA_LATCH1_LED_HANDSFREE, | ||
}, | ||
{ | ||
.cdev = { | ||
.name = "ams-delta:voicemail", | ||
.brightness_set = ams_delta_led_set, | ||
}, | ||
.bitmask = AMS_DELTA_LATCH1_LED_VOICEMAIL, | ||
}, | ||
{ | ||
.cdev = { | ||
.name = "ams-delta:voice", | ||
.brightness_set = ams_delta_led_set, | ||
}, | ||
.bitmask = AMS_DELTA_LATCH1_LED_VOICE, | ||
}, | ||
}; | ||
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#ifdef CONFIG_PM | ||
static int ams_delta_led_suspend(struct platform_device *dev, | ||
pm_message_t state) | ||
{ | ||
int i; | ||
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for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++) | ||
led_classdev_suspend(&ams_delta_leds[i].cdev); | ||
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return 0; | ||
} | ||
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static int ams_delta_led_resume(struct platform_device *dev) | ||
{ | ||
int i; | ||
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for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++) | ||
led_classdev_resume(&ams_delta_leds[i].cdev); | ||
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return 0; | ||
} | ||
#else | ||
#define ams_delta_led_suspend NULL | ||
#define ams_delta_led_resume NULL | ||
#endif | ||
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static int ams_delta_led_probe(struct platform_device *pdev) | ||
{ | ||
int i; | ||
int ret; | ||
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for (i = ret = 0; ret >= 0 && i < ARRAY_SIZE(ams_delta_leds); i++) { | ||
ret = led_classdev_register(&pdev->dev, | ||
&ams_delta_leds[i].cdev); | ||
} | ||
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if (ret < 0 && i > 1) { | ||
for (i = i - 2; i >= 0; i--) | ||
led_classdev_unregister(&ams_delta_leds[i].cdev); | ||
} | ||
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return ret; | ||
} | ||
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static int ams_delta_led_remove(struct platform_device *pdev) | ||
{ | ||
int i; | ||
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for (i = ARRAY_SIZE(ams_delta_leds) - 1; i >= 0; i--) | ||
led_classdev_unregister(&ams_delta_leds[i].cdev); | ||
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return 0; | ||
} | ||
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static struct platform_driver ams_delta_led_driver = { | ||
.probe = ams_delta_led_probe, | ||
.remove = ams_delta_led_remove, | ||
.suspend = ams_delta_led_suspend, | ||
.resume = ams_delta_led_resume, | ||
.driver = { | ||
.name = "ams-delta-led", | ||
}, | ||
}; | ||
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static int __init ams_delta_led_init(void) | ||
{ | ||
return platform_driver_register(&ams_delta_led_driver); | ||
} | ||
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static void __exit ams_delta_led_exit(void) | ||
{ | ||
return platform_driver_unregister(&ams_delta_led_driver); | ||
} | ||
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module_init(ams_delta_led_init); | ||
module_exit(ams_delta_led_exit); | ||
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MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>"); | ||
MODULE_DESCRIPTION("Amstrad Delta LED driver"); | ||
MODULE_LICENSE("GPL"); |