[PATCH 2/9] ARC: timer: rtc: implement read loop in "C" vs. inline asm

From: Vineet Gupta
Date: Mon Oct 31 2016 - 18:50:31 EST


To allow for easy movement into drivers/clocksource

Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
---
arch/arc/kernel/time.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index a2db010cde18..2c51e3cafad0 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -153,14 +153,11 @@ static cycle_t arc_read_rtc(struct clocksource *cs)
cycle_t full;
} stamp;

-
- __asm__ __volatile(
- "1: \n"
- " lr %0, [AUX_RTC_LOW] \n"
- " lr %1, [AUX_RTC_HIGH] \n"
- " lr %2, [AUX_RTC_CTRL] \n"
- " bbit0.nt %2, 31, 1b \n"
- : "=r" (stamp.low), "=r" (stamp.high), "=r" (status));
+ do {
+ stamp.low = read_aux_reg(AUX_RTC_LOW);
+ stamp.high = read_aux_reg(AUX_RTC_HIGH);
+ status = read_aux_reg(AUX_RTC_CTRL);
+ } while (!(status & 0x80000000UL));

return stamp.full;
}
--
2.7.4