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Merge tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Browse Source 
Pull RTC updates from Alexandre Belloni:
 "RTC for 4.8

  Cleanups:
   - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup
     rtc-cmos, rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
   - move mn10300 to rtc-cmos

  Subsystem:
   - fix wakealarms after hibernate
   - multiples fixes for rctest
   - simplify implementations of .read_alarm

  New drivers:
   - Maxim MAX6916

  Drivers:
   - ds1307: fix weekday
   - m41t80: add wakeup support
   - pcf85063: add support for PCF85063A variant
   - rv8803: extend i2c fix and other fixes
   - s35390a: fix alarm reading, this fixes instant reboot after
     shutdown for QNAP TS-41x
   - s3c: clock fixes"

* tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (65 commits)
  rtc: rv8803: Clear V1F when setting the time
  rtc: rv8803: Stop the clock while setting the time
  rtc: rv8803: Always apply the I²C workaround
  rtc: rv8803: Fix read day of week
  rtc: rv8803: Remove the check for valid time
  rtc: rv8803: Kconfig: Indicate rx8900 support
  rtc: asm9260: remove .owner field for driver
  rtc: at91sam9: Fix missing spin_lock_init()
  rtc: m41t80: add suspend handlers for alarm IRQ
  rtc: m41t80: make it a real error message
  rtc: pcf85063: Add support for the PCF85063A device
  rtc: pcf85063: fix year range
  rtc: hym8563: in .read_alarm set .tm_sec to 0 to signal minute accuracy
  rtc: explicitly set tm_sec = 0 for drivers with minute accurancy
  rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq()
  rtc: s3c: Remove unnecessary call to disable already disabled clock
  rtc: abx80x: use devm_add_action_or_reset()
  rtc: m41t80: use devm_add_action_or_reset()
  rtc: fix a typo and reduce three empty lines to one
  rtc: s35390a: improve two comments in .set_alarm
  ...
This commit is contained in:
Linus Torvalds
2016-08-05 09:48:22 -04:00
parent d4c06c7081 6f367788d6
commit 6c84239d59
105 changed files with 848 additions and 1580 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/mn10300/Kconfig
View File

@@ -236,7 +236,9 @@ source "kernel/Kconfig.hz"
config MN10300_RTC
bool "Using MN10300 RTC"
depends on MN10300_PROC_MN103E010 || MN10300_PROC_MN2WS0050
select GENERIC_CMOS_UPDATE
select RTC_CLASS
select RTC_DRV_CMOS
select RTC_SYSTOHC
default n
help
This option enables support for the RTC, thus enabling time to be

4
arch/mn10300/include/asm/rtc-regs.h
View File

@@ -75,9 +75,9 @@
#define RTC_PORT(x) 0xd8600000
#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
#define CMOS_READ(addr) __SYSREG(0xd8600000 + (addr), u8)
#define CMOS_READ(addr) __SYSREG(0xd8600000 + (u32)(addr), u8)
#define CMOS_WRITE(val, addr) \
do { __SYSREG(0xd8600000 + (addr), u8) = val; } while (0)
do { __SYSREG(0xd8600000 + (u32)(addr), u8) = val; } while (0)
#define RTC_IRQ RTIRQ

2
arch/mn10300/include/asm/rtc.h
View File

@@ -25,6 +25,4 @@ static inline void calibrate_clock(void)
#endif /* !CONFIG_MN10300_RTC */
#include <asm-generic/rtc.h>
#endif /* _ASM_RTC_H */

104
arch/mn10300/kernel/rtc.c
View File

@@ -12,107 +12,19 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mc146818rtc.h>
#include <linux/bcd.h>
#include <linux/timex.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <asm/rtc-regs.h>
#include <asm/rtc.h>
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL(rtc_lock);
/*
* Read the current RTC time
*/
void read_persistent_clock(struct timespec *ts)
{
struct rtc_time tm;
get_rtc_time(&tm);
ts->tv_nsec = 0;
ts->tv_sec = mktime(tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
/* if rtc is way off in the past, set something reasonable */
if (ts->tv_sec < 0)
ts->tv_sec = mktime(2009, 1, 1, 12, 0, 0);
}
/*
* In order to set the CMOS clock precisely, set_rtc_mmss has to be called 500
* ms after the second nowtime has started, because when nowtime is written
* into the registers of the CMOS clock, it will jump to the next second
* precisely 500 ms later. Check the Motorola MC146818A or Dallas DS12887 data
* sheet for details.
*
* BUG: This routine does not handle hour overflow properly; it just
* sets the minutes. Usually you'll only notice that after reboot!
*/
static int set_rtc_mmss(unsigned long nowtime)
{
unsigned char save_control, save_freq_select;
int retval = 0;
int real_seconds, real_minutes, cmos_minutes;
/* gets recalled with irq locally disabled */
spin_lock(&rtc_lock);
save_control = CMOS_READ(RTC_CONTROL); /* tell the clock it's being
* set */
CMOS_WRITE(save_control | RTC_SET, RTC_CONTROL);
save_freq_select = CMOS_READ(RTC_FREQ_SELECT); /* stop and reset
* prescaler */
CMOS_WRITE(save_freq_select | RTC_DIV_RESET2, RTC_FREQ_SELECT);
cmos_minutes = CMOS_READ(RTC_MINUTES);
if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
cmos_minutes = bcd2bin(cmos_minutes);
/*
* since we're only adjusting minutes and seconds,
* don't interfere with hour overflow. This avoids
* messing with unknown time zones but requires your
* RTC not to be off by more than 15 minutes
*/
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - cmos_minutes) + 15) / 30) & 1)
/* correct for half hour time zone */
real_minutes += 30;
real_minutes %= 60;
if (abs(real_minutes - cmos_minutes) < 30) {
if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
real_seconds = bin2bcd(real_seconds);
real_minutes = bin2bcd(real_minutes);
}
CMOS_WRITE(real_seconds, RTC_SECONDS);
CMOS_WRITE(real_minutes, RTC_MINUTES);
} else {
printk_once(KERN_NOTICE
"set_rtc_mmss: can't update from %d to %d\n",
cmos_minutes, real_minutes);
retval = -1;
}
/* The following flags have to be released exactly in this order,
* otherwise the DS12887 (popular MC146818A clone with integrated
* battery and quartz) will not reset the oscillator and will not
* update precisely 500 ms later. You won't find this mentioned in
* the Dallas Semiconductor data sheets, but who believes data
* sheets anyway ... -- Markus Kuhn
*/
CMOS_WRITE(save_control, RTC_CONTROL);
CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
spin_unlock(&rtc_lock);
return retval;
}
int update_persistent_clock(struct timespec now)
{
return set_rtc_mmss(now.tv_sec);
}
static const __initdata struct resource res[] = {
DEFINE_RES_IO(RTC_PORT(0), RTC_IO_EXTENT),
DEFINE_RES_IRQ(RTC_IRQ),
};
/*
* calibrate the TSC clock against the RTC
@@ -129,4 +41,6 @@ void __init calibrate_clock(void)
RTCRA |= RTCRA_DVR;
RTCRA &= ~RTCRA_DVR;
RTCRB &= ~RTCRB_SET;
platform_device_register_simple("rtc_cmos", -1, res, ARRAY_SIZE(res));
}

3
arch/mn10300/proc-mn103e010/proc-init.c
View File

@@ -9,7 +9,10 @@
* 2 of the Licence, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/irq.h>
#include <asm/cacheflush.h>
#include <asm/fpu.h>
#include <asm/irq.h>
#include <asm/rtc.h>
#include <asm/busctl-regs.h>

1
arch/mn10300/proc-mn2ws0050/proc-init.c
View File

@@ -14,6 +14,7 @@
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <asm/cacheflush.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/io.h>