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authorMark Brown <broonie@opensource.wolfsonmicro.com>2009-06-15 11:23:20 +0100
committerBen Dooks <ben-linux@fluff.org>2009-06-16 23:36:24 +0100
commitb3748ddd80569ec753f62e709629b8c639143222 (patch)
treebbb9cf936244ae7bdd7f7e8a115758093163af70 /arch/arm/Kconfig
parentd06a49eec97718949acfdc26110701d28b1872c0 (diff)
downloadop-kernel-dev-b3748ddd80569ec753f62e709629b8c639143222.zip
op-kernel-dev-b3748ddd80569ec753f62e709629b8c639143222.tar.gz
[ARM] S3C64XX: Initial support for DVFS
This patch provides initial support for CPU frequency scaling on the Samsung S3C ARM processors. Currently only S3C6410 processors are supported, though addition of another data table with supported clock rates should be sufficient to enable support for further CPUs. Use the regulator framework to provide optional support for DVFS in the S3C cpufreq driver. When a software controllable regulator is configured the driver will use it to lower the supply voltage when running at a lower frequency, giving improved power savings. When regulator support is disabled or no regulator can be obtained for VDDARM the driver will fall back to scaling only the frequency. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2947510..aef63c8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1241,7 +1241,7 @@ endmenu
menu "CPU Power Management"
-if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA)
+if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA || ARCH_S3C64XX)
source "drivers/cpufreq/Kconfig"
@@ -1272,6 +1272,10 @@ config CPU_FREQ_PXA
default y
select CPU_FREQ_DEFAULT_GOV_USERSPACE
+config CPU_FREQ_S3C64XX
+ bool "CPUfreq support for Samsung S3C64XX CPUs"
+ depends on CPU_FREQ && CPU_S3C6410
+
endif
source "drivers/cpuidle/Kconfig"
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