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| author | Graf Yang <graf.yang@analog.com> | 2009-05-15 11:01:59 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-06-12 06:11:37 -0400 |
| commit | 1fa9be72b558c39459f98835eb86dbb4ef4da30b (patch) | |
| tree | f0b71c7b7a3639285c64e3f3cbc449c3ff9eee3b /arch/blackfin/Kconfig | |
| parent | 555487bbb63f527e63fecbff48c86e2c07ce5024 (diff) | |
| download | kernel_samsung_crespo-1fa9be72b558c39459f98835eb86dbb4ef4da30b.zip kernel_samsung_crespo-1fa9be72b558c39459f98835eb86dbb4ef4da30b.tar.gz kernel_samsung_crespo-1fa9be72b558c39459f98835eb86dbb4ef4da30b.tar.bz2 | |
Blackfin: add support for gptimer0 as a tick source
For systems where the core cycles are not a usable tick source (like SMP
or cycles gets updated), enable gptimer0 as an alternative.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/Kconfig')
| -rw-r--r-- | arch/blackfin/Kconfig | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index cea2bfd..c04e7a4 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -241,12 +241,6 @@ config IRQ_PER_CPU depends on SMP default y -config TICK_SOURCE_SYSTMR0 - bool - select BFIN_GPTIMERS - depends on SMP - default y - config BF_REV_MIN int default 0 if (BF51x || BF52x || (BF54x && !BF54xM)) @@ -607,7 +601,6 @@ source kernel/Kconfig.hz config GENERIC_TIME bool "Generic time" - depends on !SMP default y config GENERIC_CLOCKEVENTS @@ -615,12 +608,26 @@ config GENERIC_CLOCKEVENTS depends on GENERIC_TIME default y +choice + prompt "Kernel Tick Source" + depends on GENERIC_CLOCKEVENTS + default TICKSOURCE_CORETMR + +config TICKSOURCE_GPTMR0 + bool "Gptimer0 (SCLK domain)" + select BFIN_GPTIMERS + depends on !IPIPE + +config TICKSOURCE_CORETMR + bool "Core timer (CCLK domain)" + +endchoice + config CYCLES_CLOCKSOURCE - bool "Use 'CYCLES' as a clocksource (EXPERIMENTAL)" - depends on EXPERIMENTAL + bool "Use 'CYCLES' as a clocksource" depends on GENERIC_CLOCKEVENTS depends on !BFIN_SCRATCH_REG_CYCLES - default n + depends on !SMP help If you say Y here, you will enable support for using the 'cycles' registers as a clock source. Doing so means you will be unable to @@ -628,6 +635,11 @@ config CYCLES_CLOCKSOURCE still be able to read it (such as for performance monitoring), but writing the registers will most likely crash the kernel. +config GPTMR0_CLOCKSOURCE + bool "Use GPTimer0 as a clocksource (higher rating)" + depends on GENERIC_CLOCKEVENTS + depends on !TICKSOURCE_GPTMR0 + source kernel/time/Kconfig comment "Misc" |