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OpenCloudOS-Kernel/drivers/cpufreq/Kconfig.arm

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[CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/ According to discussion of the ARM arch subsystem migration, ARM cpufreq drivers move to drivers/cpufreq. So this patch adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210 and EXYNOS4210 cpufreq driver compile in there. As a note, otherw will be moved. Cc: Dave Jones <davej@redhat.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2011-06-02 05:18:22 +08:00
#
# ARM CPU Frequency scaling drivers
#
[CPUFREQ] Add S3C2416/S3C2450 cpufreq driver The S3C2416/S3C2450 SoCs support two sources for the armclk. The first source is the so called armdiv which divides the msysclk down to provide necessary cpu rates. In this mode the core voltage must be always at 1.3V. The frequency from the armdiv is not allowed to be lower than the hclk frequency. In the second mode the armclk can be sourced directly from the hclk in the so called "dynamic voltags scaling" (dvs) mode. Here the armdiv isn't used at all. Also in this mode the core voltage may be lowered. Existing hardware and tests with it suggest 1.0V as sufficient. When changing the clock source to the armdiv from the hclk, the SoC shows stability issues if the new frequency is higher than the current hclk frequency. Hence the driver always forces the armdiv to the hclk frequency before the source change and lets the cpufreq issue another set_target call for higher frequencies. To mark the hclk frequency as lower as the corresponding armdiv frequency it is set 1MHz below the real frequency. This lets the cpufreq framework change between 133MHz based on hclk and 133MHz based on armdiv at will. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Andrey Gusakov <dron0gus@gmail.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-02-16 18:42:32 +08:00
config ARM_S3C2416_CPUFREQ
bool "S3C2416 CPU Frequency scaling support"
depends on CPU_S3C2416
help
This adds the CPUFreq driver for the Samsung S3C2416 and
S3C2450 SoC. The S3C2416 supports changing the rate of the
armdiv clock source and also entering a so called dynamic
voltage scaling mode in which it is possible to reduce the
core voltage of the cpu.
If in doubt, say N.
config ARM_S3C2416_CPUFREQ_VCORESCALE
bool "Allow voltage scaling for S3C2416 arm core (EXPERIMENTAL)"
depends on ARM_S3C2416_CPUFREQ && REGULATOR && EXPERIMENTAL
help
Enable CPU voltage scaling when entering the dvs mode.
It uses information gathered through existing hardware and
tests but not documented in any datasheet.
If in doubt, say N.
[CPUFREQ] Move compile for S3C64XX cpufreq to /drivers/cpufreq Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2011-06-07 09:43:01 +08:00
config ARM_S3C64XX_CPUFREQ
bool "Samsung S3C64XX"
depends on CPU_S3C6410
default y
help
This adds the CPUFreq driver for Samsung S3C6410 SoC.
If in doubt, say N.
[CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/ According to discussion of the ARM arch subsystem migration, ARM cpufreq drivers move to drivers/cpufreq. So this patch adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210 and EXYNOS4210 cpufreq driver compile in there. As a note, otherw will be moved. Cc: Dave Jones <davej@redhat.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2011-06-02 05:18:22 +08:00
config ARM_S5PV210_CPUFREQ
bool "Samsung S5PV210 and S5PC110"
depends on CPU_S5PV210
default y
help
This adds the CPUFreq driver for Samsung S5PV210 and
S5PC110 SoCs.
If in doubt, say N.
[CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driver To support various EXYNOS series SoCs commonly, added exynos common structure. exynos-cpufreq.c => EXYNOS series common cpufreq driver exynos4210-cpufreq.c => EXYNOS4210 support cpufreq driver Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-01-07 19:18:35 +08:00
config ARM_EXYNOS_CPUFREQ
bool "SAMSUNG EXYNOS SoCs"
depends on ARCH_EXYNOS
select ARM_EXYNOS4210_CPUFREQ if CPU_EXYNOS4210
default y
help
This adds the CPUFreq driver common part for Samsung
EXYNOS SoCs.
If in doubt, say N.
[CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/ According to discussion of the ARM arch subsystem migration, ARM cpufreq drivers move to drivers/cpufreq. So this patch adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210 and EXYNOS4210 cpufreq driver compile in there. As a note, otherw will be moved. Cc: Dave Jones <davej@redhat.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2011-06-02 05:18:22 +08:00
config ARM_EXYNOS4210_CPUFREQ
bool "Samsung EXYNOS4210"
[CPUFREQ] Fix exposure of ARM_EXYNOS4210_CPUFREQ exynos4210-cpufreq.c is not buildable on non-exynos builds, so it's pointless allowing this option to be exposed. Fix this by adding a dependency on ARCH_EXYNOS. drivers/cpufreq/exynos4210-cpufreq.c:20:29: error: mach/regs-clock.h: No such file or directory drivers/cpufreq/exynos4210-cpufreq.c:21:26: error: mach/cpufreq.h: No such file or directory Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: cpufreq@vger.kernel.org Cc: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-02-13 17:49:40 +08:00
depends on ARCH_EXYNOS
[CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/ According to discussion of the ARM arch subsystem migration, ARM cpufreq drivers move to drivers/cpufreq. So this patch adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210 and EXYNOS4210 cpufreq driver compile in there. As a note, otherw will be moved. Cc: Dave Jones <davej@redhat.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2011-06-02 05:18:22 +08:00
help
This adds the CPUFreq driver for Samsung EXYNOS4210
SoC (S5PV310 or S5PC210).