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| author | Jan Weitzel <j.weitzel@phytec.de> | 2011-03-17 13:44:29 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-03-23 15:08:12 +0100 |
| commit | 93b20e4fdbe1ddc4bef79d968cb1ba453324a499 (patch) | |
| tree | 0bc9719659ea8bed908199944cbcc510355b2b57 /arch/arm/plat-mxc/time.c | |
| parent | 350ac9ddce074855030b88c9e8c016574d2e9097 (diff) | |
| download | linux-93b20e4fdbe1ddc4bef79d968cb1ba453324a499.tar.bz2 | |
ARM: mxc: Add dummy_get_cycles to avoid access before init is done
this is needed to use get_cycles with sched_clock. Accessing timer
without enabled clk will result in crash
Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc/time.c')
| -rw-r--r-- | arch/arm/plat-mxc/time.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c index 9f0c2610595e..0142e4b2e12e 100644 --- a/arch/arm/plat-mxc/time.c +++ b/arch/arm/plat-mxc/time.c @@ -105,6 +105,11 @@ static void gpt_irq_acknowledge(void) __raw_writel(V2_TSTAT_OF1, timer_base + V2_TSTAT); } +static cycle_t dummy_get_cycles(struct clocksource *cs) +{ + return 0; +} + static cycle_t mx1_2_get_cycles(struct clocksource *cs) { return __raw_readl(timer_base + MX1_2_TCN); @@ -118,7 +123,7 @@ static cycle_t v2_get_cycles(struct clocksource *cs) static struct clocksource clocksource_mxc = { .name = "mxc_timer1", .rating = 200, - .read = mx1_2_get_cycles, + .read = dummy_get_cycles, .mask = CLOCKSOURCE_MASK(32), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -129,6 +134,8 @@ static int __init mxc_clocksource_init(struct clk *timer_clk) if (timer_is_v2()) clocksource_mxc.read = v2_get_cycles; + else + clocksource_mxc.read = mx1_2_get_cycles; clocksource_register_hz(&clocksource_mxc, c); |