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ARM: exynos: register sched_clock callback

PATCH New Vincent Guittot 4 participants 4 messages Apr 24, 2014 – May 2, 2014

Subsystems (2)
Arm Samsung Exynos Clocksource, clockevent drivers
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Vincent Guittot

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#0 lore raw

PATCH 1/1 ARM: exynos: register sched_clock callback

Use the clocksource mct-frc for sched_clock

Signed-off-by Vincent Guittot <[email protected]>
---
 drivers/clocksource/exynos_mct.c | 8 ++++++++
 1 file changed, 8 insertions(+)
drivers/clocksource/exynos_mct.c +8 -0
index a6ee6d7..61b0577 100644
@@ -24,6 +24,7 @@
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 #include <linux/clocksource.h>
+#include <linux/sched_clock.h>
 
 #define EXYNOS4_MCTREG(x)		(x)
 #define EXYNOS4_MCT_G_CNT_L		EXYNOS4_MCTREG(0x100)

@@ -192,12 +193,19 @@ struct clocksource mct_frc = {
 	.resume		= exynos4_frc_resume,
 };
 
+static u64 notrace exynos4_read_sched_clock(void)
+{
+	return exynos4_frc_read(&mct_frc);
+}
+
 static void __init exynos4_clocksource_init(void)
 {
 	exynos4_mct_frc_start(0, 0);
 
 	if (clocksource_register_hz(&mct_frc, clk_rate))
 		panic("%s: can't register clocksource\n", mct_frc.name);
+
+	sched_clock_register(exynos4_read_sched_clock, 64, clk_rate);
 }
 
 static void exynos4_mct_comp0_stop(void)
Signature · 1 line
1.9.1
#1 lore raw

PATCH 1/1 ARM: exynos: register sched_clock callback

Hi Vincent,

Quoted 30 lines · Vincent Guittot

Use the clocksource mct-frc for sched_clock

Signed-off-by Vincent Guittot <[email protected]>
---
  drivers/clocksource/exynos_mct.c | 8 ++++++++
  1 file changed, 8 insertions(+)
drivers/clocksource/exynos_mct.c +6 -0
index a6ee6d7..61b0577 100644
@@ -24,6 +24,7 @@
  #include <linux/of_irq.h>
  #include <linux/of_address.h>
  #include <linux/clocksource.h>
+#include <linux/sched_clock.h>
 
  #define EXYNOS4_MCTREG(x)		(x)
  #define EXYNOS4_MCT_G_CNT_L		EXYNOS4_MCTREG(0x100)

@@ -192,12 +193,19 @@ struct clocksource mct_frc = {
  	.resume		= exynos4_frc_resume,
  };
 
+static u64 notrace exynos4_read_sched_clock(void)
+{
+	return exynos4_frc_read(&mct_frc);
+}
+
  static void __init exynos4_clocksource_init(void)

drivers/clocksource/exynos_mct.c struct clocksource mct_frc = { · line 211

Quoted 10 lines
drivers/clocksource/exynos_mct.c +2 -0
  {
  	exynos4_mct_frc_start(0, 0);
 
  	if (clocksource_register_hz(&mct_frc, clk_rate))
  		panic("%s: can't register clocksource\n", mct_frc.name);
+
+	sched_clock_register(exynos4_read_sched_clock, 64, clk_rate);
  }
 
  static void exynos4_mct_comp0_stop(void)

Thanks for this patch.

Reviewed-by Tomasz Figa <[email protected]>

Best regards,
Tomasz

#2 lore raw

PATCH 1/1 ARM: exynos: register sched_clock callback

In reply to Vincent Guittot
Quoted 3 lines · Vincent Guittot

Use the clocksource mct-frc for sched_clock

Signed-off-by Vincent Guittot <[email protected]>
Acked-by Daniel Lezcano <[email protected]>

[ ... ]

Signature · 5 lines
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