Messages in this thread Patch in this message | | | From | Daniel Lezcano <> | Subject | [PATCH 10/11] clocksource: dw_apb_timer_of: Make IO endian agnostic | Date | Mon, 30 Mar 2015 22:17:12 +0200 |
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From: Ben Dooks <ben.dooks@codethink.co.uk>
The dw_apb_timer_of timer is using __raw_readl to access the timer register, which is causing issues when the system is running in big endian mode. Fix this by using readl_relaxed() which should account for the endian settings.
This fixes issues where the time jumps around in the dmesg output due to returnling __le32 values.
For an example, these two console lines show time running backwards:
[ 49.882572] CPU1: failed to come online [ 43.282457] Brought up 1 CPUs
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linux ARM Kernel <linux-arm-kernel@lists.infradead.org> Cc: Dinh Nguyen <dinguyen@opensource.altera.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> --- drivers/clocksource/dw_apb_timer_of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c index d305fb0..a19a3f6 100644 --- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -108,7 +108,7 @@ static void __init add_clocksource(struct device_node *source_timer) static u64 notrace read_sched_clock(void) { - return ~__raw_readl(sched_io_base); + return ~readl_relaxed(sched_io_base); } static const struct of_device_id sptimer_ids[] __initconst = { -- 1.9.1
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