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sparc: time: Replace update_persistent_clock() with CONFIG_RTC_SYSTOHC 

On Sparc systems, update_persistent_clock() uses RTC drivers to do
the job, it makes more sense to hand it over to CONFIG_RTC_SYSTOHC.

In the long run, all the update_persistent_clock() should migrate to
proper class RTC drivers if any and use CONFIG_RTC_SYSTOHC instead.

Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Xunlei Pang 2015-06-12 11:10:17 +08:00 committed by Alexandre Belloni
parent 9c5150b31b
commit 460ea8d70d
3 changed files with 1 additions and 36 deletions
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2
arch/sparc/Kconfig
View File

@ -25,6 +25,7 @@ config SPARC
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select RTC_CLASS
select RTC_DRV_M48T59
select RTC_SYSTOHC
select HAVE_DMA_ATTRS
select HAVE_DMA_API_DEBUG
select HAVE_ARCH_JUMP_LABEL if SPARC64
@ -35,7 +36,6 @@ config SPARC
select HAVE_BPF_JIT
select HAVE_DEBUG_BUGVERBOSE
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CMOS_UPDATE
select GENERIC_CLOCKEVENTS
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER

21
arch/sparc/kernel/time_32.c
View File

@ -23,7 +23,6 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/rtc.h>
#include <linux/rtc/m48t59.h>
#include <linux/timex.h>
#include <linux/clocksource.h>
@ -65,8 +64,6 @@ DEFINE_PER_CPU(struct clock_event_device, sparc32_clockevent);
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL(rtc_lock);
static int set_rtc_mmss(unsigned long);
unsigned long profile_pc(struct pt_regs *regs)
{
extern char __copy_user_begin[], __copy_user_end[];
@ -87,11 +84,6 @@ EXPORT_SYMBOL(profile_pc);
volatile u32 __iomem *master_l10_counter;
int update_persistent_clock(struct timespec now)
{
return set_rtc_mmss(now.tv_sec);
}
irqreturn_t notrace timer_interrupt(int dummy, void *dev_id)
{
if (timer_cs_enabled) {
@ -362,16 +354,3 @@ void __init time_init(void)
sbus_time_init();
}
static int set_rtc_mmss(unsigned long secs)
{
struct rtc_device *rtc = rtc_class_open("rtc0");
int err = -1;
if (rtc) {
err = rtc_set_mmss(rtc, secs);
rtc_class_close(rtc);
}
return err;
}

14
arch/sparc/kernel/time_64.c
View File

@ -28,7 +28,6 @@
#include <linux/cpufreq.h>
#include <linux/percpu.h>
#include <linux/miscdevice.h>
#include <linux/rtc.h>
#include <linux/rtc/m48t59.h>
#include <linux/kernel_stat.h>
#include <linux/clockchips.h>
@ -394,19 +393,6 @@ static struct sparc64_tick_ops hbtick_operations __read_mostly = {
static unsigned long timer_ticks_per_nsec_quotient __read_mostly;
int update_persistent_clock(struct timespec now)
{
struct rtc_device *rtc = rtc_class_open("rtc0");
int err = -1;
if (rtc) {
err = rtc_set_mmss(rtc, now.tv_sec);
rtc_class_close(rtc);
}
return err;
}
unsigned long cmos_regs;
EXPORT_SYMBOL(cmos_regs);