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authorGraf Yang <graf.yang@analog.com>2009-05-15 11:01:59 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-12 06:11:37 -0400
commit1fa9be72b558c39459f98835eb86dbb4ef4da30b (patch)
treef0b71c7b7a3639285c64e3f3cbc449c3ff9eee3b /arch/blackfin/Kconfig
parent555487bbb63f527e63fecbff48c86e2c07ce5024 (diff)
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/Kconfig32
1 files changed, 22 insertions, 10 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index cea2bfd64a56..c04e7a4836f2 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"