From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Noam Camus <noamca@mellanox.com>, <tglx@linutronix.de>,
<linux-snps-arc@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <Alexey.Brodkin@synopsys.com>,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH v3 02/10] ARC: timer: gfrc, rtc: deuglify big endian code
Date: Thu, 3 Nov 2016 16:33:27 -0700 [thread overview]
Message-ID: <1478216015-18931-3-git-send-email-vgupta@synopsys.com> (raw)
In-Reply-To: <1478216015-18931-1-git-send-email-vgupta@synopsys.com>
A standard "C" shift will be handled appropriately by the compiler
depending on the endian for the build. So we don't need the
explicit distinction in code
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
arch/arc/kernel/time.c | 30 ++++++++----------------------
1 file changed, 8 insertions(+), 22 deletions(-)
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index c10390d1ddb6..8d66bb446209 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -86,26 +86,19 @@ static int noinline arc_get_timer_clk(struct device_node *node)
static cycle_t arc_read_gfrc(struct clocksource *cs)
{
unsigned long flags;
- union {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- struct { u32 h, l; };
-#else
- struct { u32 l, h; };
-#endif
- cycle_t full;
- } stamp;
+ u32 l, h;
local_irq_save(flags);
__mcip_cmd(CMD_GFRC_READ_LO, 0);
- stamp.l = read_aux_reg(ARC_REG_MCIP_READBACK);
+ l = read_aux_reg(ARC_REG_MCIP_READBACK);
__mcip_cmd(CMD_GFRC_READ_HI, 0);
- stamp.h = read_aux_reg(ARC_REG_MCIP_READBACK);
+ h = read_aux_reg(ARC_REG_MCIP_READBACK);
local_irq_restore(flags);
- return stamp.full;
+ return (((cycle_t)h) << 32) | l;
}
static struct clocksource arc_counter_gfrc = {
@@ -143,14 +136,7 @@ CLOCKSOURCE_OF_DECLARE(arc_gfrc, "snps,archs-timer-gfrc", arc_cs_setup_gfrc);
static cycle_t arc_read_rtc(struct clocksource *cs)
{
unsigned long status;
- union {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- struct { u32 high, low; };
-#else
- struct { u32 low, high; };
-#endif
- cycle_t full;
- } stamp;
+ u32 l, h;
/*
* hardware has an internal state machine which tracks readout of
@@ -159,12 +145,12 @@ static cycle_t arc_read_rtc(struct clocksource *cs)
* - high increments after low has been read
*/
do {
- stamp.low = read_aux_reg(AUX_RTC_LOW);
- stamp.high = read_aux_reg(AUX_RTC_HIGH);
+ l = read_aux_reg(AUX_RTC_LOW);
+ h = read_aux_reg(AUX_RTC_HIGH);
status = read_aux_reg(AUX_RTC_CTRL);
} while (!(status & _BITUL(31)));
- return stamp.full;
+ return (((cycle_t)h) << 32) | l;
}
static struct clocksource arc_counter_rtc = {
--
2.7.4
next prev parent reply other threads:[~2016-11-03 23:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-03 23:33 [PATCH v3 00/10] Move ARC timer code into drivers/clocksource/ Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 01/10] ARC: timer: rtc: implement read loop in "C" vs. inline asm Vineet Gupta
2016-11-03 23:33 ` Vineet Gupta [this message]
2016-11-03 23:33 ` [PATCH v3 03/10] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 04/10] ARC: timer: gfrc: boot print alongside other timers Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 05/10] ARC: time: move time_init() out of the driver Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 06/10] ARC: timer: Build gfrc, rtc under same option (64-bit timers) Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 07/10] ARC: breakout aux handling into a separate header Vineet Gupta
2016-11-04 0:40 ` kbuild test robot
2016-11-07 21:18 ` [PATCH v4 " Vineet Gupta
2016-11-07 21:18 ` Vineet Gupta
2016-11-04 17:35 ` [PATCH v3 " Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 08/10] ARC: move mcip.h into include/soc and adjust the includes Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 09/10] ARC: breakout timer include code into separate header Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 10/10] clocksource: import ARC timer driver Vineet Gupta
2016-11-10 10:49 ` Daniel Lezcano
2016-11-10 22:12 ` Vineet Gupta
2016-11-08 17:49 ` [PATCH v3 00/10] Move ARC timer code into drivers/clocksource/ Vineet Gupta
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