61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
|
/* rtc-starfire.c: Starfire platform RTC driver.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/rtc.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
|
||
|
|
#include <asm/oplib.h>
|
||
|
|
|
||
|
|
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
|
||
|
|
MODULE_DESCRIPTION("Starfire RTC driver");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
|
||
|
|
static u32 starfire_get_time(void)
|
||
|
|
{
|
||
|
|
static char obp_gettod[32];
|
||
|
|
static u32 unix_tod;
|
||
|
|
|
||
|
|
sprintf(obp_gettod, "h# %08x unix-gettod",
|
||
|
|
(unsigned int) (long) &unix_tod);
|
||
|
|
prom_feval(obp_gettod);
|
||
|
|
|
||
|
|
return unix_tod;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int starfire_read_time(struct device *dev, struct rtc_time *tm)
|
||
|
|
{
|
||
|
|
rtc_time_to_tm(starfire_get_time(), tm);
|
||
|
|
return rtc_valid_tm(tm);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct rtc_class_ops starfire_rtc_ops = {
|
||
|
|
.read_time = starfire_read_time,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init starfire_rtc_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct rtc_device *rtc;
|
||
|
|
|
||
|
|
rtc = devm_rtc_device_register(&pdev->dev, "starfire",
|
||
|
|
&starfire_rtc_ops, THIS_MODULE);
|
||
|
|
if (IS_ERR(rtc))
|
||
|
|
return PTR_ERR(rtc);
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, rtc);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver starfire_rtc_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "rtc-starfire",
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
|