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b3d627a5f2
Backend driver to dynamically set voltage and frequency on IBM POWER non-virtualized platforms. Power management SPRs are used to set the required PState. This driver works in conjunction with cpufreq governors like 'ondemand' to provide a demand based frequency and voltage setting on IBM POWER non-virtualized platforms. PState table is obtained from OPAL v3 firmware through device tree. powernv_cpufreq back-end driver would parse the relevant device-tree nodes and initialise the cpufreq subsystem on powernv platform. The code was originally written by svaidy@linux.vnet.ibm.com. Over time it was modified to accomodate bug-fixes as well as updates to the the cpu-freq core. Relevant portions of the change logs corresponding to those modifications are noted below: * The policy->cpus needs to be populated in a hotplug-invariant manner instead of using cpu_sibling_mask() which varies with cpu-hotplug. This is because the cpufreq core code copies this content into policy->related_cpus mask which should not vary on cpu-hotplug. [Authored by srivatsa.bhat@linux.vnet.ibm.com] * Create a helper routine that can return the cpu-frequency for the corresponding pstate_id. Also, cache the values of the pstate_max, pstate_min and pstate_nominal and nr_pstates in a static structure so that they can be reused in the future to perform any validations. [Authored by ego@linux.vnet.ibm.com] * Create a driver attribute named cpuinfo_nominal_freq which creates a sysfs read-only file named cpuinfo_nominal_freq. Export the frequency corresponding to the nominal_pstate through this interface. Nominal frequency is the highest non-turbo frequency for the platform. This is generally used for setting governor policies from user space for optimal energy efficiency. [Authored by ego@linux.vnet.ibm.com] * Implement a powernv_cpufreq_get(unsigned int cpu) method which will return the current operating frequency. Export this via the sysfs interface cpuinfo_cur_freq by setting powernv_cpufreq_driver.get to powernv_cpufreq_get(). [Authored by ego@linux.vnet.ibm.com] [Change log updated by ego@linux.vnet.ibm.com] Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
103 lines
4.9 KiB
Makefile
103 lines
4.9 KiB
Makefile
# CPUfreq core
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obj-$(CONFIG_CPU_FREQ) += cpufreq.o freq_table.o
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# CPUfreq stats
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obj-$(CONFIG_CPU_FREQ_STAT) += cpufreq_stats.o
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# CPUfreq governors
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obj-$(CONFIG_CPU_FREQ_GOV_PERFORMANCE) += cpufreq_performance.o
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obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE) += cpufreq_powersave.o
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obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE) += cpufreq_userspace.o
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obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o
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obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o
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obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o
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obj-$(CONFIG_GENERIC_CPUFREQ_CPU0) += cpufreq-cpu0.o
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##################################################################################
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# x86 drivers.
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# Link order matters. K8 is preferred to ACPI because of firmware bugs in early
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# K8 systems. This is still the case but acpi-cpufreq errors out so that
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# powernow-k8 can load then. ACPI is preferred to all other hardware-specific drivers.
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# speedstep-* is preferred over p4-clockmod.
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obj-$(CONFIG_X86_ACPI_CPUFREQ) += acpi-cpufreq.o
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obj-$(CONFIG_X86_POWERNOW_K8) += powernow-k8.o
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obj-$(CONFIG_X86_PCC_CPUFREQ) += pcc-cpufreq.o
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obj-$(CONFIG_X86_POWERNOW_K6) += powernow-k6.o
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obj-$(CONFIG_X86_POWERNOW_K7) += powernow-k7.o
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obj-$(CONFIG_X86_LONGHAUL) += longhaul.o
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obj-$(CONFIG_X86_E_POWERSAVER) += e_powersaver.o
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obj-$(CONFIG_ELAN_CPUFREQ) += elanfreq.o
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obj-$(CONFIG_SC520_CPUFREQ) += sc520_freq.o
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obj-$(CONFIG_X86_LONGRUN) += longrun.o
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obj-$(CONFIG_X86_GX_SUSPMOD) += gx-suspmod.o
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obj-$(CONFIG_X86_SPEEDSTEP_ICH) += speedstep-ich.o
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obj-$(CONFIG_X86_SPEEDSTEP_LIB) += speedstep-lib.o
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obj-$(CONFIG_X86_SPEEDSTEP_SMI) += speedstep-smi.o
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obj-$(CONFIG_X86_SPEEDSTEP_CENTRINO) += speedstep-centrino.o
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obj-$(CONFIG_X86_P4_CLOCKMOD) += p4-clockmod.o
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obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o
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obj-$(CONFIG_X86_INTEL_PSTATE) += intel_pstate.o
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obj-$(CONFIG_X86_AMD_FREQ_SENSITIVITY) += amd_freq_sensitivity.o
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##################################################################################
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# ARM SoC drivers
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obj-$(CONFIG_ARM_BIG_LITTLE_CPUFREQ) += arm_big_little.o
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# big LITTLE per platform glues. Keep DT_BL_CPUFREQ as the last entry in all big
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# LITTLE drivers, so that it is probed last.
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obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o
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obj-$(CONFIG_ARCH_DAVINCI_DA850) += davinci-cpufreq.o
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obj-$(CONFIG_UX500_SOC_DB8500) += dbx500-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += exynos-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS4X12_CPUFREQ) += exynos4x12-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS5250_CPUFREQ) += exynos5250-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o
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obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o
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obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o
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obj-$(CONFIG_ARM_INTEGRATOR) += integrator-cpufreq.o
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obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o
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obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
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obj-$(CONFIG_PXA25x) += pxa2xx-cpufreq.o
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obj-$(CONFIG_PXA27x) += pxa2xx-cpufreq.o
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obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
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obj-$(CONFIG_ARM_S3C24XX_CPUFREQ) += s3c24xx-cpufreq.o
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obj-$(CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS) += s3c24xx-cpufreq-debugfs.o
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obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
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obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o
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obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o
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obj-$(CONFIG_ARM_S3C2440_CPUFREQ) += s3c2440-cpufreq.o
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obj-$(CONFIG_ARM_S3C64XX_CPUFREQ) += s3c64xx-cpufreq.o
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obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o
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obj-$(CONFIG_ARM_SA1100_CPUFREQ) += sa1100-cpufreq.o
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obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o
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obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o
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obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra-cpufreq.o
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obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ) += vexpress-spc-cpufreq.o
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##################################################################################
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# PowerPC platform drivers
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obj-$(CONFIG_CPU_FREQ_CBE) += ppc-cbe-cpufreq.o
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ppc-cbe-cpufreq-y += ppc_cbe_cpufreq_pervasive.o ppc_cbe_cpufreq.o
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obj-$(CONFIG_CPU_FREQ_CBE_PMI) += ppc_cbe_cpufreq_pmi.o
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obj-$(CONFIG_CPU_FREQ_MAPLE) += maple-cpufreq.o
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obj-$(CONFIG_PPC_CORENET_CPUFREQ) += ppc-corenet-cpufreq.o
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obj-$(CONFIG_CPU_FREQ_PMAC) += pmac32-cpufreq.o
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obj-$(CONFIG_CPU_FREQ_PMAC64) += pmac64-cpufreq.o
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obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += pasemi-cpufreq.o
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obj-$(CONFIG_POWERNV_CPUFREQ) += powernv-cpufreq.o
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##################################################################################
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# Other platform drivers
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obj-$(CONFIG_AVR32_AT32AP_CPUFREQ) += at32ap-cpufreq.o
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obj-$(CONFIG_BFIN_CPU_FREQ) += blackfin-cpufreq.o
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obj-$(CONFIG_CRIS_MACH_ARTPEC3) += cris-artpec3-cpufreq.o
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obj-$(CONFIG_ETRAXFS) += cris-etraxfs-cpufreq.o
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obj-$(CONFIG_IA64_ACPI_CPUFREQ) += ia64-acpi-cpufreq.o
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obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o
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obj-$(CONFIG_SH_CPU_FREQ) += sh-cpufreq.o
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obj-$(CONFIG_SPARC_US2E_CPUFREQ) += sparc-us2e-cpufreq.o
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obj-$(CONFIG_SPARC_US3_CPUFREQ) += sparc-us3-cpufreq.o
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obj-$(CONFIG_UNICORE32) += unicore2-cpufreq.o
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