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clocksource: tcb_clksrc: Make tc_mode interrupt safe

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tc_mode() can be called from interrupt context and thus must not call
clk_*prepare*() functions.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
David Jander 2014-05-08 12:06:25 +02:00 committed by Daniel Lezcano
parent f214be50f3
commit acbf6d21ac
1 changed files with 4 additions and 4 deletions
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8
drivers/clocksource/tcb_clksrc.c
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@ -100,7 +100,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d)
|| tcd->clkevt.mode == CLOCK_EVT_MODE_ONESHOT) {
__raw_writel(0xff, regs + ATMEL_TC_REG(2, IDR));
__raw_writel(ATMEL_TC_CLKDIS, regs + ATMEL_TC_REG(2, CCR));
clk_disable_unprepare(tcd->clk);
clk_disable(tcd->clk);
}
switch (m) {
@ -109,7 +109,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d)
* of oneshot, we get lower overhead and improved accuracy.
*/
case CLOCK_EVT_MODE_PERIODIC:
clk_prepare_enable(tcd->clk);
clk_enable(tcd->clk);
/* slow clock, count up to RC, then irq and restart */
__raw_writel(timer_clock
@ -126,7 +126,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d)
break;
case CLOCK_EVT_MODE_ONESHOT:
clk_prepare_enable(tcd->clk);
clk_enable(tcd->clk);
/* slow clock, count up to RC, then irq and stop */
__raw_writel(timer_clock | ATMEL_TC_CPCSTOP
@ -194,7 +194,7 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
ret = clk_prepare_enable(t2_clk);
if (ret)
return ret;
clk_disable_unprepare(t2_clk);
clk_disable(t2_clk);
clkevt.regs = tc->regs;
clkevt.clk = t2_clk;