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/* rtc-starfire.c: Starfire platform RTC driver.
*
* Author: David S. Miller
* License: GPL
*
* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <asm/oplib.h>
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_time64_to_tm(starfire_get_time(), tm);
return 0;
}
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_allocate_device(&pdev->dev);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
rtc->ops = &starfire_rtc_ops;
rtc->range_max = U32_MAX;
platform_set_drvdata(pdev, rtc);
return devm_rtc_register_device(rtc);
}
static struct platform_driver starfire_rtc_driver = {
.driver = {
.name = "rtc-starfire",
},
};
builtin_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
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