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| author | Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> | 2012-02-24 22:50:50 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-27 11:18:40 +0000 |
| commit | 120213728c6407398428a5692cfa5004b520b274 (patch) | |
| tree | 401d734baf58a7fd1c3fc5cc58fad0d74199e4eb /arch | |
| parent | 7e55d0527e4925a49464a5b26fdabae1f7a91a77 (diff) | |
| download | linux-120213728c6407398428a5692cfa5004b520b274.tar.gz linux-120213728c6407398428a5692cfa5004b520b274.tar.bz2 linux-120213728c6407398428a5692cfa5004b520b274.zip | |
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')
| -rw-r--r-- | arch/arm/plat-spear/time.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c index 0c77e4298675..abb5bdecd509 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)); |