Commit 47a0b6f3 authored by liuyun's avatar liuyun Committed by Hongchen Zhang
Browse files

cpufreq: Add cpufreq driver for LoongArch 

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP



--------------------------------

Signed-off-by: default avatarzhangtianyang <zhangtianyang@loongson.cn>
Signed-off-by: default avatarliuyun <liuyun@loongson.cn>
parent 7f688be7

arch/loongarch/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -673,6 +673,7 @@ config ARCH_SUSPEND_POSSIBLE 
config ARCH_HIBERNATION_POSSIBLE

	def_bool y



source "drivers/cpufreq/Kconfig"

source "kernel/power/Kconfig"

source "drivers/acpi/Kconfig"

arch/loongarch/configs/loongson3_defconfig

+4 −0
Original line number Diff line number Diff line
@@ -61,6 +61,10 @@ CONFIG_ACPI_DOCK=y 
CONFIG_ACPI_IPMI=m

CONFIG_ACPI_HOTPLUG_CPU=y

CONFIG_ACPI_PCI_SLOT=y

CONFIG_CPU_FREQ=y

CONFIG_CPU_FREQ_STAT=y

CONFIG_CPU_FREQ_GOV_POWERSAVE=y

CONFIG_LOONGSON3_ACPI_CPUFREQ=y

CONFIG_ACPI_HOTPLUG_MEMORY=y

CONFIG_EFI_ZBOOT=y

CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y

arch/loongarch/include/asm/fpu.h

+12 −1
Original line number Diff line number Diff line
@@ -48,6 +48,10 @@ static inline void disable_lasx(void); 
static inline void save_lasx(struct task_struct *t);

static inline void restore_lasx(struct task_struct *t);



#ifdef CONFIG_LOONGSON3_ACPI_CPUFREQ

DECLARE_PER_CPU(unsigned long, msa_count);

DECLARE_PER_CPU(unsigned long, lasx_count);

#endif

/*

 * Mask the FCSR Cause bits according to the Enable bits, observing

 * that Unimplemented is always enabled.
@@ -210,6 +214,9 @@ static inline void enable_lsx(void) 
{

	if (cpu_has_lsx)

		csr_xchg32(CSR_EUEN_LSXEN, CSR_EUEN_LSXEN, LOONGARCH_CSR_EUEN);

#ifdef CONFIG_LOONGSON3_ACPI_CPUFREQ

		per_cpu(msa_count, raw_smp_processor_id())++;

#endif

}



static inline void disable_lsx(void)
@@ -256,8 +263,12 @@ static inline void restore_lsx_upper(struct task_struct *t) {} 
static inline void enable_lasx(void)

{



	if (cpu_has_lasx)

	if (cpu_has_lasx) {

		csr_xchg32(CSR_EUEN_LASXEN, CSR_EUEN_LASXEN, LOONGARCH_CSR_EUEN);

#ifdef CONFIG_LOONGSON3_ACPI_CPUFREQ

		per_cpu(lasx_count, raw_smp_processor_id())++;

#endif

	}

}



static inline void disable_lasx(void)

drivers/cpufreq/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -273,6 +273,17 @@ config LOONGSON2_CPUFREQ 
	  If in doubt, say N.

endif



if LOONGARCH

config LOONGSON3_ACPI_CPUFREQ

	bool "Loongson3 ACPI cpufreq driver"

	depends on ACPI_PROCESSOR

	help

	  This driver adds a CPUFreq driver which utilizes the ACPI

	  Processor Performance States.

	  This driver supports Loongson 3A5000 compatible CPUs.

	  If in doubt, say N.

endif



if SPARC64

config SPARC_US3_CPUFREQ

	tristate "UltraSPARC-III CPU Frequency driver"

drivers/cpufreq/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ obj-$(CONFIG_POWERNV_CPUFREQ) += powernv-cpufreq.o 
obj-$(CONFIG_BMIPS_CPUFREQ)		+= bmips-cpufreq.o

obj-$(CONFIG_IA64_ACPI_CPUFREQ)		+= ia64-acpi-cpufreq.o

obj-$(CONFIG_LOONGSON2_CPUFREQ)		+= loongson2_cpufreq.o

obj-$(CONFIG_LOONGSON3_ACPI_CPUFREQ)	+= loongson3-acpi-cpufreq.o

obj-$(CONFIG_SH_CPU_FREQ)		+= sh-cpufreq.o

obj-$(CONFIG_SPARC_US2E_CPUFREQ)	+= sparc-us2e-cpufreq.o

obj-$(CONFIG_SPARC_US3_CPUFREQ)		+= sparc-us3-cpufreq.o