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authorLinus Torvalds <torvalds@linux-foundation.org>2016-08-05 16:48:22 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-05 16:48:22 +0300
commit6c84239d595dc6ffe39f0f03dae2f64ed200db95 (patch)
tree3aea4368a644be16e44612c964aa26152854e1ae /arch/mn10300
parentd4c06c708123c652025d04fe77b7e39448077395 (diff)
parent6f367788d6333a41fefd013975b0b160d5c0a1c8 (diff)
downloadlinux-6c84239d595dc6ffe39f0f03dae2f64ed200db95.tar.xz
Merge tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
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 ...
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/Kconfig4
-rw-r--r--arch/mn10300/include/asm/rtc-regs.h4
-rw-r--r--arch/mn10300/include/asm/rtc.h2
-rw-r--r--arch/mn10300/kernel/rtc.c104
-rw-r--r--arch/mn10300/proc-mn103e010/proc-init.c3
-rw-r--r--arch/mn10300/proc-mn2ws0050/proc-init.c1
6 files changed, 18 insertions, 100 deletions
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 9627e81a6cbb..38e3494bfb63 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -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
diff --git a/arch/mn10300/include/asm/rtc-regs.h b/arch/mn10300/include/asm/rtc-regs.h
index c42deefaec11..c81cacecb6e3 100644
--- a/arch/mn10300/include/asm/rtc-regs.h
+++ b/arch/mn10300/include/asm/rtc-regs.h
@@ -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
diff --git a/arch/mn10300/include/asm/rtc.h b/arch/mn10300/include/asm/rtc.h
index 6c14bb1d0d9b..07dc87656197 100644
--- a/arch/mn10300/include/asm/rtc.h
+++ b/arch/mn10300/include/asm/rtc.h
@@ -25,6 +25,4 @@ static inline void calibrate_clock(void)
#endif /* !CONFIG_MN10300_RTC */
-#include <asm-generic/rtc.h>
-
#endif /* _ASM_RTC_H */
diff --git a/arch/mn10300/kernel/rtc.c b/arch/mn10300/kernel/rtc.c
index 48d7058b3295..f81f37025072 100644
--- a/arch/mn10300/kernel/rtc.c
+++ b/arch/mn10300/kernel/rtc.c
@@ -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));
}
diff --git a/arch/mn10300/proc-mn103e010/proc-init.c b/arch/mn10300/proc-mn103e010/proc-init.c
index 27b97980dca4..102d86a6ae56 100644
--- a/arch/mn10300/proc-mn103e010/proc-init.c
+++ b/arch/mn10300/proc-mn103e010/proc-init.c
@@ -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>
diff --git a/arch/mn10300/proc-mn2ws0050/proc-init.c b/arch/mn10300/proc-mn2ws0050/proc-init.c
index ee6d03dbc8d8..950cc8dbb284 100644
--- a/arch/mn10300/proc-mn2ws0050/proc-init.c
+++ b/arch/mn10300/proc-mn2ws0050/proc-init.c
@@ -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>