[GIT PULL] clockevents: fixes for 3.15

[GIT PULL] clockevents: fixes for 3.15

[Daniel Lezcano]

Hi Thomas, Ingo,

this pull request contains a couple of fixes:

  * David Jander fixed the calls to clk_disable/clk_enable in the 
tc_mode function as this could be called in an interrupt context

  * Zhiwu Song forces the irq affinity on the marco timer as the 
initialization can happen before the cpu to affine is up

Thanks
   -- Daniel


The following changes since commit 84ea7fe37908254c3bd90910921f6e1045c1747a:

   hrtimer: Set expiry time before switch_hrtimer_base() (2014-05-12 
10:47:39 +0200)

are available in the git repository at:

   git://git.linaro.org/people/daniel.lezcano/linux.git 
clockevents/3.15-fixes

for you to fetch changes up to acbf6d21ac81195071b97ebb114b0b37bd9fcc86:

   clocksource: tcb_clksrc: Make tc_mode interrupt safe (2014-05-22 
18:54:58 +0200)

----------------------------------------------------------------
David Jander (1):
       clocksource: tcb_clksrc: Make tc_mode interrupt safe

Zhiwu Song (1):
       clocksource: marco: Fix the affinity set for local timer of CPU1

  drivers/clocksource/tcb_clksrc.c  |    8 ++++----
  drivers/clocksource/timer-marco.c |    2 +-
  2 files changed, 5 insertions(+), 5 deletions(-)


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[PATCH 1/2] clocksource: marco: Fix the affinity set for local timer of CPU1

[Daniel Lezcano]

From: Zhiwu Song <Zhiwu.Song@csr.com>

irqchip will reject the affinity set to CPUs which is not online
yet. but in the CPU1 wakeup stage, OS only sets CPU1 to be online
after local timer is set, so that causes the irq_set_affinity not
work. this patch moves to irq_force_affinity() for the low level
boot stage.

Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/clocksource/timer-marco.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-marco.c b/drivers/clocksource/timer-marco.c
index b52e1c0..7f5374d 100644
--- a/drivers/clocksource/timer-marco.c
+++ b/drivers/clocksource/timer-marco.c
@@ -199,7 +199,7 @@ static int sirfsoc_local_timer_setup(struct clock_event_device *ce)
 
 	action->dev_id = ce;
 	BUG_ON(setup_irq(ce->irq, action));
-	irq_set_affinity(action->irq, cpumask_of(cpu));
+	irq_force_affinity(action->irq, cpumask_of(cpu));
 
 	clockevents_register_device(ce);
 	return 0;
-- 
1.7.9.5

[PATCH 2/2] clocksource: tcb_clksrc: Make tc_mode interrupt safe

[Daniel Lezcano]

From: David Jander <david@protonic.nl>

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>
---
 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 00fdd11..a8d7ea1 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;
-- 
1.7.9.5