From acbf6d21ac81195071b97ebb114b0b37bd9fcc86 Mon Sep 17 00:00:00 2001 From: David Jander Date: Thu, 8 May 2014 12:06:25 +0200 Subject: [PATCH] clocksource: tcb_clksrc: Make tc_mode interrupt safe tc_mode() can be called from interrupt context and thus must not call clk_*prepare*() functions. Signed-off-by: David Jander Signed-off-by: Daniel Lezcano Acked-by: Alexandre Belloni Acked-by: Nicolas Ferre --- drivers/clocksource/tcb_clksrc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c index 00fdd1170284..a8d7ea14f183 100644 --- a/drivers/clocksource/tcb_clksrc.c +++ b/drivers/clocksource/tcb_clksrc.c @@ -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; -- 2.20.1