mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 05:30:53 +07:00
85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
|
/* rtc-generic: RTC driver using the generic RTC abstraction
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/time.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/rtc.h>
|
||
|
|
|
||
|
|
#include <asm/rtc.h>
|
||
|
|
|
||
|
|
static int generic_get_time(struct device *dev, struct rtc_time *tm)
|
||
|
|
{
|
||
|
|
unsigned int ret = get_rtc_time(tm);
|
||
|
|
|
||
|
|
if (ret & RTC_BATT_BAD)
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
return rtc_valid_tm(tm);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int generic_set_time(struct device *dev, struct rtc_time *tm)
|
||
|
|
{
|
||
|
|
if (set_rtc_time(tm) < 0)
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct rtc_class_ops generic_rtc_ops = {
|
||
|
|
.read_time = generic_get_time,
|
||
|
|
.set_time = generic_set_time,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init generic_rtc_probe(struct platform_device *dev)
|
||
|
|
{
|
||
|
|
struct rtc_device *rtc;
|
||
|
|
|
||
|
|
rtc = rtc_device_register("rtc-generic", &dev->dev, &generic_rtc_ops,
|
||
|
|
THIS_MODULE);
|
||
|
|
if (IS_ERR(rtc))
|
||
|
|
return PTR_ERR(rtc);
|
||
|
|
|
||
|
|
platform_set_drvdata(dev, rtc);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __exit generic_rtc_remove(struct platform_device *dev)
|
||
|
|
{
|
||
|
|
struct rtc_device *rtc = platform_get_drvdata(dev);
|
||
|
|
|
||
|
|
rtc_device_unregister(rtc);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver generic_rtc_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "rtc-generic",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.remove = __exit_p(generic_rtc_remove),
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init generic_rtc_init(void)
|
||
|
|
{
|
||
|
|
return platform_driver_probe(&generic_rtc_driver, generic_rtc_probe);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit generic_rtc_fini(void)
|
||
|
|
{
|
||
|
|
platform_driver_unregister(&generic_rtc_driver);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(generic_rtc_init);
|
||
|
|
module_exit(generic_rtc_fini);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_DESCRIPTION("Generic RTC driver");
|
||
|
|
MODULE_ALIAS("platform:rtc-generic");
|