From b3748ddd80569ec753f62e709629b8c639143222 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 15 Jun 2009 11:23:20 +0100 Subject: [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 Signed-off-by: Ben Dooks --- arch/arm/Kconfig | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/arm/Kconfig') diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 29475101a7b3..aef63c8e3d2d 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" -- cgit v1.2.2