diff options
| author | Jan Weitzel <j.weitzel@phytec.de> | 2011-03-17 15:44:30 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-03-23 17:08:13 +0300 |
| commit | c124befc0d1981f5f3e438d06313fa8270a9edb6 (patch) | |
| tree | 426821450899fcf3dcef0578b8ab45d728856441 /arch | |
| parent | 93b20e4fdbe1ddc4bef79d968cb1ba453324a499 (diff) | |
| download | linux-c124befc0d1981f5f3e438d06313fa8270a9edb6.tar.xz | |
ARM: mxc: Add sched_clock to mxc platform
Add sched_clock using cyc_to_sched_clock and update_sched_clock
with HAVE_SCHED_CLOCK
tested on iMX27 and iMX35
Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/plat-mxc/time.c | 16 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 599e1634840d..f4027abac8aa 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -362,6 +362,7 @@ config ARCH_MXC select GENERIC_CLOCKEVENTS select ARCH_REQUIRE_GPIOLIB select CLKDEV_LOOKUP + select HAVE_SCHED_CLOCK help Support for Freescale MXC/iMX-based family of processors diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c index 0142e4b2e12e..2237ff8b434f 100644 --- a/arch/arm/plat-mxc/time.c +++ b/arch/arm/plat-mxc/time.c @@ -27,6 +27,7 @@ #include <linux/clk.h> #include <mach/hardware.h> +#include <asm/sched_clock.h> #include <asm/mach/time.h> #include <mach/common.h> @@ -128,6 +129,20 @@ static struct clocksource clocksource_mxc = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static DEFINE_CLOCK_DATA(cd); +unsigned long long notrace sched_clock(void) +{ + cycle_t cyc = clocksource_mxc.read(&clocksource_mxc); + + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} + +static void notrace mxc_update_sched_clock(void) +{ + cycle_t cyc = clocksource_mxc.read(&clocksource_mxc); + update_sched_clock(&cd, cyc, (u32)~0); +} + static int __init mxc_clocksource_init(struct clk *timer_clk) { unsigned int c = clk_get_rate(timer_clk); @@ -137,6 +152,7 @@ static int __init mxc_clocksource_init(struct clk *timer_clk) else clocksource_mxc.read = mx1_2_get_cycles; + init_sched_clock(&cd, mxc_update_sched_clock, 32, c); clocksource_register_hz(&clocksource_mxc, c); return 0; |