xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

omap1: Fix sched_clock implementation when both MPU timer and 32K timer are used

Browse Source 
Earlier patches select HAVE_SCHED_CLOCK for omaps. To have working sched_clock
also for MPU timer, we need to implement it in a way where the right one gets
selected during the runtime.

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren
2011-01-18 17:00:00 -08:00
parent 05b5ca9b10
commit 4912cf04b2
3 changed files with 61 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm/plat-omap/counter_32k.c
View File

@@ -120,12 +120,24 @@ static DEFINE_CLOCK_DATA(cd);
#define SC_MULT 4000000000u
#define SC_SHIFT 17
unsigned long long notrace sched_clock(void)
static inline unsigned long long notrace _omap_32k_sched_clock(void)
{
u32 cyc = clocksource_32k.read(&clocksource_32k);
return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT);
}
#ifndef CONFIG_OMAP_MPU_TIMER
unsigned long long notrace sched_clock(void)
{
return _omap_32k_sched_clock();
}
#else
unsigned long long notrace omap_32k_sched_clock(void)
{
return _omap_32k_sched_clock();
}
#endif
static void notrace omap_update_sched_clock(void)
{
u32 cyc = clocksource_32k.read(&clocksource_32k);