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/*
* An RTC test device/driver
* Copyright (C) 2005 Tower Technologies
* Author: Alessandro Zummo <a.zummo@towertech.it>
*
* 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.
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
static struct platform_device *test0 = NULL, *test1 = NULL;
static int test_rtc_read_alarm(struct device *dev,
struct rtc_wkalrm *alrm)
{
return 0;
}
static int test_rtc_set_alarm(struct device *dev,
struct rtc_wkalrm *alrm)
{
return 0;
}
static int test_rtc_read_time(struct device *dev,
struct rtc_time *tm)
{
rtc_time_to_tm(get_seconds(), tm);
return 0;
}
static int test_rtc_set_time(struct device *dev,
struct rtc_time *tm)
{
return 0;
}
static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
{
return 0;
}
static int test_rtc_proc(struct device *dev, struct seq_file *seq)
{
struct platform_device *plat_dev = to_platform_device(dev);
seq_printf(seq, "test\t\t: yes\n");
seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
return 0;
}
static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
unsigned long arg)
{
/* We do support interrupts, they're generated
* using the sysfs interface.
*/
switch (cmd) {
case RTC_PIE_ON:
case RTC_PIE_OFF:
case RTC_UIE_ON:
case RTC_UIE_OFF:
case RTC_AIE_ON:
case RTC_AIE_OFF:
return 0;
default:
return -EINVAL;
}
}
static struct rtc_class_ops test_rtc_ops = {
.proc = test_rtc_proc,
.read_time = test_rtc_read_time,
.set_time = test_rtc_set_time,
.read_alarm = test_rtc_read_alarm,
.set_alarm = test_rtc_set_alarm,
.set_mmss = test_rtc_set_mmss,
.ioctl = test_rtc_ioctl,
};
static ssize_t test_irq_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", 42);
}
static ssize_t test_irq_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int retval;
struct platform_device *plat_dev = to_platform_device(dev);
struct rtc_device *rtc = platform_get_drvdata(plat_dev);
retval = count;
if (strncmp(buf, "tick", 4) == 0)
rtc_update_irq(&rtc->class_dev, 1, RTC_PF | RTC_IRQF);
else if (strncmp(buf, "alarm", 5) == 0)
rtc_update_irq(&rtc->class_dev, 1, RTC_AF | RTC_IRQF);
else if (strncmp(buf, "update", 6) == 0)
rtc_update_irq(&rtc->class_dev, 1, RTC_UF | RTC_IRQF);
else
retval = -EINVAL;
return retval;
}
static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
static int test_probe(struct platform_device *plat_dev)
{
int err;
struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
&test_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc)) {
err = PTR_ERR(rtc);
dev_err(&plat_dev->dev,
"unable to register the class device\n");
return err;
}
device_create_file(&plat_dev->dev, &dev_attr_irq);
platform_set_drvdata(plat_dev, rtc);
return 0;
}
static int __devexit test_remove(struct platform_device *plat_dev)
{
struct rtc_device *rtc = platform_get_drvdata(plat_dev);
rtc_device_unregister(rtc);
device_remove_file(&plat_dev->dev, &dev_attr_irq);
return 0;
}
static struct platform_driver test_drv = {
.probe = test_probe,
.remove = __devexit_p(test_remove),
.driver = {
.name = "rtc-test",
.owner = THIS_MODULE,
},
};
static int __init test_init(void)
{
int err;
if ((err = platform_driver_register(&test_drv)))
return err;
if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
err = -ENOMEM;
goto exit_driver_unregister;
}
if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
err = -ENOMEM;
goto exit_free_test0;
}
if ((err = platform_device_add(test0)))
goto exit_free_test1;
if ((err = platform_device_add(test1)))
goto exit_device_unregister;
return 0;
exit_device_unregister:
platform_device_unregister(test0);
exit_free_test1:
platform_device_put(test1);
exit_free_test0:
platform_device_put(test0);
exit_driver_unregister:
platform_driver_unregister(&test_drv);
return err;
}
static void __exit test_exit(void)
{
platform_device_unregister(test0);
platform_device_unregister(test1);
platform_driver_unregister(&test_drv);
}
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("RTC test driver/device");
MODULE_LICENSE("GPL");
module_init(test_init);
module_exit(test_exit);
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