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authorGilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>2012-02-24 22:50:50 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-02-27 11:18:40 +0000
commit120213728c6407398428a5692cfa5004b520b274 (patch)
tree401d734baf58a7fd1c3fc5cc58fad0d74199e4eb /arch/arm/plat-spear
parent7e55d0527e4925a49464a5b26fdabae1f7a91a77 (diff)
downloadop-kernel-dev-120213728c6407398428a5692cfa5004b520b274.zip
op-kernel-dev-120213728c6407398428a5692cfa5004b520b274.tar.gz
ARM: 7348/1: arm/spear600: fix one-shot timer
Currently, the "clockevent_next_event" function only works correctly if the timer is not running when this function is called, which is not always the case when running with CONFIG_HIGH_RES_TIMERS. Fix this by stopping the timer at the beginning of this function. Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> Acked-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Stefan Roese <sr@denx.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-spear')
-rw-r--r--arch/arm/plat-spear/time.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index 0c77e42..abb5bde 100644
--- a/arch/arm/plat-spear/time.c
+++ b/arch/arm/plat-spear/time.c
@@ -145,11 +145,13 @@ static void clockevent_set_mode(enum clock_event_mode mode,
static int clockevent_next_event(unsigned long cycles,
struct clock_event_device *clk_event_dev)
{
- u16 val;
+ u16 val = readw(gpt_base + CR(CLKEVT));
+
+ if (val & CTRL_ENABLE)
+ writew(val & ~CTRL_ENABLE, gpt_base + CR(CLKEVT));
writew(cycles, gpt_base + LOAD(CLKEVT));
- val = readw(gpt_base + CR(CLKEVT));
val |= CTRL_ENABLE | CTRL_INT_ENABLE;
writew(val, gpt_base + CR(CLKEVT));
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