linux-kernel - [PATCH] clocksource/drivers/arm_global_timer: Always use {readl|writel}

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Message-ID: <1447403678-7217-1-git-send-email-jszhang@marvell.com>
Date:	Fri, 13 Nov 2015 16:34:38 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<srinivas.kandagatla@...il.com>, <maxime.coquelin@...com>,
	<patrice.chotard@...com>, <daniel.lezcano@...aro.org>,
	<tglx@...utronix.de>
CC:	<linux-arm-kernel@...ts.infradead.org>, <kernel@...inux.com>,
	<linux-kernel@...r.kernel.org>, Jisheng Zhang <jszhang@...vell.com>
Subject: [PATCH] clocksource/drivers/arm_global_timer: Always use {readl|writel}_relaxed

This driver use both readl/writel and their relaxed version, this patch
tries to unify the io accesses.

Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
---
 drivers/clocksource/arm_global_timer.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/clocksource/arm_global_timer.c b/drivers/clocksource/arm_global_timer.c
index a2cb6fa..84a5a5d 100644
--- a/drivers/clocksource/arm_global_timer.c
+++ b/drivers/clocksource/arm_global_timer.c
@@ -99,27 +99,27 @@ static void gt_compare_set(unsigned long delta, int periodic)
 
 	counter += delta;
 	ctrl = GT_CONTROL_TIMER_ENABLE;
-	writel(ctrl, gt_base + GT_CONTROL);
-	writel(lower_32_bits(counter), gt_base + GT_COMP0);
-	writel(upper_32_bits(counter), gt_base + GT_COMP1);
+	writel_relaxed(ctrl, gt_base + GT_CONTROL);
+	writel_relaxed(lower_32_bits(counter), gt_base + GT_COMP0);
+	writel_relaxed(upper_32_bits(counter), gt_base + GT_COMP1);
 
 	if (periodic) {
-		writel(delta, gt_base + GT_AUTO_INC);
+		writel_relaxed(delta, gt_base + GT_AUTO_INC);
 		ctrl |= GT_CONTROL_AUTO_INC;
 	}
 
 	ctrl |= GT_CONTROL_COMP_ENABLE | GT_CONTROL_IRQ_ENABLE;
-	writel(ctrl, gt_base + GT_CONTROL);
+	writel_relaxed(ctrl, gt_base + GT_CONTROL);
 }
 
 static int gt_clockevent_shutdown(struct clock_event_device *evt)
 {
 	unsigned long ctrl;
 
-	ctrl = readl(gt_base + GT_CONTROL);
+	ctrl = readl_relaxed(gt_base + GT_CONTROL);
 	ctrl &= ~(GT_CONTROL_COMP_ENABLE | GT_CONTROL_IRQ_ENABLE |
 		  GT_CONTROL_AUTO_INC);
-	writel(ctrl, gt_base + GT_CONTROL);
+	writel_relaxed(ctrl, gt_base + GT_CONTROL);
 	return 0;
 }
 
@@ -212,11 +212,11 @@ static u64 notrace gt_sched_clock_read(void)
 
 static void __init gt_clocksource_init(void)
 {
-	writel(0, gt_base + GT_CONTROL);
-	writel(0, gt_base + GT_COUNTER0);
-	writel(0, gt_base + GT_COUNTER1);
+	writel_relaxed(0, gt_base + GT_CONTROL);
+	writel_relaxed(0, gt_base + GT_COUNTER0);
+	writel_relaxed(0, gt_base + GT_COUNTER1);
 	/* enables timer on all the cores */
-	writel(GT_CONTROL_TIMER_ENABLE, gt_base + GT_CONTROL);
+	writel_relaxed(GT_CONTROL_TIMER_ENABLE, gt_base + GT_CONTROL);
 
 #ifdef CONFIG_CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
 	sched_clock_register(gt_sched_clock_read, 64, gt_clk_rate);
-- 
2.6.2

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