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| author | Mikael Pettersson <mikpe@it.uu.se> | 2009-10-29 19:46:54 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-10-29 19:46:54 +0100 |
| commit | a91549a8f27e63e0e537fe1c20d4845581de894f (patch) | |
| tree | 6cf4a9ecf379cc4bdaa8d988c45702135aecdaa3 /arch/arm/mach-iop13xx | |
| parent | Linux 2.6.32-rc5 (diff) | |
| download | linux-a91549a8f27e63e0e537fe1c20d4845581de894f.tar.xz linux-a91549a8f27e63e0e537fe1c20d4845581de894f.zip | |
iop: clocksource support
This updates the IOP platform to expose the free-running
timer 1 as a clocksource object. This timer is now also
properly initialised, which requires a new write_tcr1()
function from the mach-specific code. Apart from the
explicit initialisation, there is no functional change
in how timer 1 is programmed.
Tested on n2100, compile-tested for all plat-iop machines.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'arch/arm/mach-iop13xx')
| -rw-r--r-- | arch/arm/mach-iop13xx/include/mach/time.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mach-iop13xx/include/mach/time.h b/arch/arm/mach-iop13xx/include/mach/time.h index d6d52527589d..9fb2768c84bb 100644 --- a/arch/arm/mach-iop13xx/include/mach/time.h +++ b/arch/arm/mach-iop13xx/include/mach/time.h @@ -90,6 +90,11 @@ static inline u32 read_tcr1(void) return val; } +static inline void write_tcr1(u32 val) +{ + asm volatile("mcr p6, 0, %0, c3, c9, 0" : : "r" (val)); +} + static inline void write_trr0(u32 val) { asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (val)); |