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Commit 36ca4ba4 authored by Christian Krafft's avatar Christian Krafft Committed by Paul Mackerras
Browse files

[POWERPC] cell: add cpufreq driver for Cell BE processor 



This patch adds a cpufreq backend driver to enable frequency scaling on cell.

Signed-off-by: default avatarChristian Krafft <krafft@de.ibm.com>
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent a8984970

arch/powerpc/configs/cell_defconfig

+14 −1
Original line number Diff line number Diff line
@@ -139,7 +139,19 @@ CONFIG_RTAS_FLASH=y 
CONFIG_MMIO_NVRAM=y

# CONFIG_PPC_MPC106 is not set

# CONFIG_PPC_970_NAP is not set

# CONFIG_CPU_FREQ is not set

CONFIG_CPU_FREQ=y

CONFIG_CPU_FREQ_TABLE=y

CONFIG_CPU_FREQ_DEBUG=y

CONFIG_CPU_FREQ_STAT=y

# CONFIG_CPU_FREQ_STAT_DETAILS is not set

CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y

# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set

CONFIG_CPU_FREQ_GOV_PERFORMANCE=y

CONFIG_CPU_FREQ_GOV_POWERSAVE=y

CONFIG_CPU_FREQ_GOV_USERSPACE=y

CONFIG_CPU_FREQ_GOV_ONDEMAND=y

CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y

# CONFIG_CPU_FREQ_PMAC64 is not set

# CONFIG_WANT_EARLY_SERIAL is not set

# CONFIG_MPIC is not set
@@ -150,6 +162,7 @@ CONFIG_SPU_FS=m 
CONFIG_SPU_BASE=y

CONFIG_CBE_RAS=y

CONFIG_CBE_THERM=m

CONFIG_CBE_CPUFREQ=m



#

# Kernel options

arch/powerpc/kernel/prom.c

+1 −0
Original line number Diff line number Diff line
@@ -1672,6 +1672,7 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) 
	}

	return NULL;

}

EXPORT_SYMBOL(of_get_cpu_node);



#ifdef DEBUG

static struct debugfs_blob_wrapper flat_dt_blob;

arch/powerpc/kernel/smp.c

+1 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ cpumask_t cpu_sibling_map[NR_CPUS] = { [0 ... NR_CPUS-1] = CPU_MASK_NONE }; 


EXPORT_SYMBOL(cpu_online_map);

EXPORT_SYMBOL(cpu_possible_map);

EXPORT_SYMBOL(cpu_sibling_map);



/* SMP operations for this machine */

struct smp_ops_t *smp_ops;

arch/powerpc/platforms/cell/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -25,4 +25,13 @@ config CBE_THERM 
	default m

	depends on CBE_RAS



config CBE_CPUFREQ

	tristate "CBE frequency scaling"

	depends on CBE_RAS && CPU_FREQ

	default m

	help

	  This adds the cpufreq driver for Cell BE processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If you don't have such processor, say N



endmenu

arch/powerpc/platforms/cell/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ obj-$(CONFIG_PPC_CELL_NATIVE) += interrupt.o iommu.o setup.o \ 
obj-$(CONFIG_CBE_RAS)			+= ras.o



obj-$(CONFIG_CBE_THERM)			+= cbe_thermal.o

obj-$(CONFIG_CBE_CPUFREQ)		+= cbe_cpufreq.o



ifeq ($(CONFIG_SMP),y)

obj-$(CONFIG_PPC_CELL_NATIVE)		+= smp.o