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// SPDX-License-Identifier: GPL-2.0
/*
* PS3 RTC Driver
*
* Copyright 2009 Sony Corporation
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <asm/lv1call.h>
#include <asm/ps3.h>
static u64 read_rtc(void)
{
int result;
u64 rtc_val;
u64 tb_val;
result = lv1_get_rtc(&rtc_val, &tb_val);
BUG_ON(result);
return rtc_val;
}
static int ps3_get_time(struct device *dev, struct rtc_time *tm)
{
rtc_time64_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
return 0;
}
static int ps3_set_time(struct device *dev, struct rtc_time *tm)
{
ps3_os_area_set_rtc_diff(rtc_tm_to_time64(tm) - read_rtc());
return 0;
}
static const struct rtc_class_ops ps3_rtc_ops = {
.read_time = ps3_get_time,
.set_time = ps3_set_time,
};
static int __init ps3_rtc_probe(struct platform_device *dev)
{
struct rtc_device *rtc;
rtc = devm_rtc_allocate_device(&dev->dev);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
rtc->ops = &ps3_rtc_ops;
rtc->range_max = U64_MAX;
platform_set_drvdata(dev, rtc);
return rtc_register_device(rtc);
}
static struct platform_driver ps3_rtc_driver = {
.driver = {
.name = "rtc-ps3",
},
};
module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
MODULE_AUTHOR("Sony Corporation");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ps3 RTC driver");
MODULE_ALIAS("platform:rtc-ps3");
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