linux-kernel - [PATCH 3.10 091/129] clocksource: dw_apb_timer_of: Fix read_sched

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Message-Id: <20140106223902.207957203@linuxfoundation.org>
Date:	Mon,  6 Jan 2014 14:38:40 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dinh Nguyen <dinguyen@...era.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: [PATCH 3.10 091/129] clocksource: dw_apb_timer_of: Fix read_sched_clock

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dinh Nguyen <dinguyen@...era.com>

commit 85dc6ee1237c8a4a7742e6abab96a20389b7d682 upstream.

The read_sched_clock should return the ~value because the clock is a
countdown implementation. read_sched_clock() should be the same as
 __apbt_read_clocksource().

Signed-off-by: Dinh Nguyen <dinguyen@...era.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clocksource/dw_apb_timer_of.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clocksource/dw_apb_timer_of.c
+++ b/drivers/clocksource/dw_apb_timer_of.c
@@ -77,7 +77,7 @@ static void __iomem *sched_io_base;
 
 static u32 read_sched_clock(void)
 {
-	return __raw_readl(sched_io_base);
+	return ~__raw_readl(sched_io_base);
 }
 
 static const struct of_device_id sptimer_ids[] __initconst = {


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