![Linus Torvalds](/assets/img/avatar_default.png)
Pull tile update from Chris Metcalf: "The interesting bug fix is support for the upcoming "4.2" release of the Tilera hypervisor, which by default launches Linux at privilege level 2 instead of 1. The fix lets new and old hypervisors and Linuxes interoperate more smoothly, so I've tagged it for stable@kernel.org so that older Linuxes will be able to boot under the newer hypervisor." * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: usb: tilegx: fix memleak when create hcd fail arch/tile: remove inline marking of EXPORT_SYMBOL functions rtc: rtc-tile: add missing platform_device_unregister() when module exit tile: support new Tilera hypervisor
159 lines
3.3 KiB
C
159 lines
3.3 KiB
C
/*
|
|
* Copyright 2011 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* Tilera-specific RTC driver.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/rtc.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
/* Platform device pointer. */
|
|
static struct platform_device *tile_rtc_platform_device;
|
|
|
|
/*
|
|
* RTC read routine. Gets time info from RTC chip via hypervisor syscall.
|
|
*/
|
|
static int read_rtc_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
HV_RTCTime hvtm = hv_get_rtc();
|
|
|
|
tm->tm_sec = hvtm.tm_sec;
|
|
tm->tm_min = hvtm.tm_min;
|
|
tm->tm_hour = hvtm.tm_hour;
|
|
tm->tm_mday = hvtm.tm_mday;
|
|
tm->tm_mon = hvtm.tm_mon;
|
|
tm->tm_year = hvtm.tm_year;
|
|
tm->tm_wday = 0;
|
|
tm->tm_yday = 0;
|
|
tm->tm_isdst = 0;
|
|
|
|
if (rtc_valid_tm(tm) < 0)
|
|
dev_warn(dev, "Read invalid date/time from RTC\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* RTC write routine. Sends time info to hypervisor via syscall, to be
|
|
* written to RTC chip.
|
|
*/
|
|
static int set_rtc_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
HV_RTCTime hvtm;
|
|
|
|
hvtm.tm_sec = tm->tm_sec;
|
|
hvtm.tm_min = tm->tm_min;
|
|
hvtm.tm_hour = tm->tm_hour;
|
|
hvtm.tm_mday = tm->tm_mday;
|
|
hvtm.tm_mon = tm->tm_mon;
|
|
hvtm.tm_year = tm->tm_year;
|
|
|
|
hv_set_rtc(hvtm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* RTC read/write ops.
|
|
*/
|
|
static const struct rtc_class_ops tile_rtc_ops = {
|
|
.read_time = read_rtc_time,
|
|
.set_time = set_rtc_time,
|
|
};
|
|
|
|
/*
|
|
* Device probe routine.
|
|
*/
|
|
static int tile_rtc_probe(struct platform_device *dev)
|
|
{
|
|
struct rtc_device *rtc;
|
|
|
|
rtc = devm_rtc_device_register(&dev->dev, "tile",
|
|
&tile_rtc_ops, THIS_MODULE);
|
|
|
|
if (IS_ERR(rtc))
|
|
return PTR_ERR(rtc);
|
|
|
|
platform_set_drvdata(dev, rtc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Device cleanup routine.
|
|
*/
|
|
static int tile_rtc_remove(struct platform_device *dev)
|
|
{
|
|
platform_set_drvdata(dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tile_rtc_platform_driver = {
|
|
.driver = {
|
|
.name = "rtc-tile",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tile_rtc_probe,
|
|
.remove = tile_rtc_remove,
|
|
};
|
|
|
|
/*
|
|
* Driver init routine.
|
|
*/
|
|
static int __init tile_rtc_driver_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = platform_driver_register(&tile_rtc_platform_driver);
|
|
if (err)
|
|
return err;
|
|
|
|
tile_rtc_platform_device = platform_device_alloc("rtc-tile", 0);
|
|
if (tile_rtc_platform_device == NULL) {
|
|
err = -ENOMEM;
|
|
goto exit_driver_unregister;
|
|
}
|
|
|
|
err = platform_device_add(tile_rtc_platform_device);
|
|
if (err)
|
|
goto exit_device_put;
|
|
|
|
return 0;
|
|
|
|
exit_device_put:
|
|
platform_device_put(tile_rtc_platform_device);
|
|
|
|
exit_driver_unregister:
|
|
platform_driver_unregister(&tile_rtc_platform_driver);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Driver cleanup routine.
|
|
*/
|
|
static void __exit tile_rtc_driver_exit(void)
|
|
{
|
|
platform_device_unregister(tile_rtc_platform_device);
|
|
platform_driver_unregister(&tile_rtc_platform_driver);
|
|
}
|
|
|
|
module_init(tile_rtc_driver_init);
|
|
module_exit(tile_rtc_driver_exit);
|
|
|
|
MODULE_DESCRIPTION("Tilera-specific Real Time Clock Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:rtc-tile");
|