179 lines
3.7 KiB
C
179 lines
3.7 KiB
C
/*
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* LED driver for the Openmoko GTA02 GSM phone
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*
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* (C) 2006-2008 by Openmoko, Inc.
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* Author: Harald Welte <laforge@openmoko.org>
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* All rights reserved.
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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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*/
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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 <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <mach/gta02.h>
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#include <plat/regs-timer.h>
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#include <linux/gta02-shadow.h>
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#define MAX_LEDS 3
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#define COUNTER 256
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struct gta02_led_priv
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{
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spinlock_t lock;
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struct led_classdev cdev;
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unsigned int gpio;
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};
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struct gta02_led_bundle
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{
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int num_leds;
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struct gta02_led_priv led[MAX_LEDS];
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};
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static inline struct gta02_led_priv *to_priv(struct led_classdev *led_cdev)
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{
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return container_of(led_cdev, struct gta02_led_priv, cdev);
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}
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static inline struct gta02_led_bundle *to_bundle(struct led_classdev *led_cdev)
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{
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return dev_get_drvdata(led_cdev->dev->parent);
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}
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static void gta02led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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unsigned long flags;
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struct gta02_led_priv *lp = to_priv(led_cdev);
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spin_lock_irqsave(&lp->lock, flags);
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gta02_gpb_setpin(lp->gpio, value ? 1 : 0);
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spin_unlock_irqrestore(&lp->lock, flags);
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}
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#ifdef CONFIG_PM
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static int gta02led_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct gta02_led_bundle *bundle = platform_get_drvdata(pdev);
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int i;
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for (i = 0; i < bundle->num_leds; i++)
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led_classdev_suspend(&bundle->led[i].cdev);
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return 0;
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}
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static int gta02led_resume(struct platform_device *pdev)
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{
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struct gta02_led_bundle *bundle = platform_get_drvdata(pdev);
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int i;
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for (i = 0; i < bundle->num_leds; i++)
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led_classdev_resume(&bundle->led[i].cdev);
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return 0;
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}
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#endif
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static int __init gta02led_probe(struct platform_device *pdev)
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{
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int i, rc;
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struct gta02_led_bundle *bundle;
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if (!machine_is_neo1973_gta02())
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return -EIO;
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bundle = kzalloc(sizeof(struct gta02_led_bundle), GFP_KERNEL);
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if (!bundle)
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return -ENOMEM;
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platform_set_drvdata(pdev, bundle);
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for (i = 0; i < pdev->num_resources; i++) {
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struct gta02_led_priv *lp;
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struct resource *r;
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if (i >= MAX_LEDS)
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break;
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r = platform_get_resource(pdev, 0, i);
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if (!r || !r->start || !r->name)
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continue;
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lp = &bundle->led[i];
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lp->gpio = r->start;
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lp->cdev.name = r->name;
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lp->cdev.brightness_set = gta02led_set;
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switch (lp->gpio) {
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case S3C2410_GPB0:
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case S3C2410_GPB1:
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case S3C2410_GPB2:
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s3c2410_gpio_cfgpin(lp->gpio, S3C2410_GPIO_OUTPUT);
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gta02_gpb_add_shadow_gpio(lp->gpio);
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break;
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default:
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break;
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}
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spin_lock_init(&lp->lock);
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rc = led_classdev_register(&pdev->dev, &lp->cdev);
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}
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bundle->num_leds = i;
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return 0;
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}
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static int gta02led_remove(struct platform_device *pdev)
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{
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struct gta02_led_bundle *bundle = platform_get_drvdata(pdev);
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int i;
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for (i = 0; i < bundle->num_leds; i++) {
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struct gta02_led_priv *lp = &bundle->led[i];
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gta02led_set(&lp->cdev, 0);
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led_classdev_unregister(&lp->cdev);
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}
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platform_set_drvdata(pdev, NULL);
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kfree(bundle);
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return 0;
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}
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static struct platform_driver gta02led_driver = {
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.probe = gta02led_probe,
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.remove = gta02led_remove,
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#ifdef CONFIG_PM
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.suspend = gta02led_suspend,
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.resume = gta02led_resume,
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#endif
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.driver = {
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.name = "gta02-led",
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},
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};
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static int __init gta02led_init(void)
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{
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return platform_driver_register(>a02led_driver);
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}
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static void __exit gta02led_exit(void)
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{
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platform_driver_unregister(>a02led_driver);
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}
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module_init(gta02led_init);
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module_exit(gta02led_exit);
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MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
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MODULE_DESCRIPTION("Openmoko GTA02 LED driver");
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MODULE_LICENSE("GPL");
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