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Commit fb5153d0 authored by Gautham R. Shenoy's avatar Gautham R. Shenoy Committed by Benjamin Herrenschmidt
Browse files

powerpc: powernv: Implement ppc_md.get_proc_freq() 



Implement a method named pnv_get_proc_freq(unsigned int cpu) which
returns the current clock rate on the 'cpu' in Hz to be reported in
/proc/cpuinfo. This method uses the value reported by cpufreq when
such a value is sane. Otherwise it falls back to old way of reporting
the clockrate, i.e. ppc_proc_freq.

Set the ppc_md.get_proc_freq() hook to pnv_get_proc_freq() on the
PowerNV platform.

Signed-off-by: default avatarGautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 2299d03a

arch/powerpc/platforms/powernv/setup.c

+21 −0
Original line number Original line Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/interrupt.h>

#include <linux/interrupt.h>

#include <linux/bug.h>

#include <linux/bug.h>

#include <linux/pci.h>

#include <linux/pci.h>

#include <linux/cpufreq.h>





#include <asm/machdep.h>

#include <asm/machdep.h>

#include <asm/firmware.h>

#include <asm/firmware.h>
@@ -290,6 +291,25 @@ static int __init pnv_probe(void) 
	return 1;

	return 1;

}

}





/*

 * Returns the cpu frequency for 'cpu' in Hz. This is used by

 * /proc/cpuinfo

 */

unsigned long pnv_get_proc_freq(unsigned int cpu)

{

	unsigned long ret_freq;



	ret_freq = cpufreq_quick_get(cpu) * 1000ul;



	/*

	 * If the backend cpufreq driver does not exist,

         * then fallback to old way of reporting the clockrate.

	 */

	if (!ret_freq)

		ret_freq = ppc_proc_freq;

	return ret_freq;

}



define_machine(powernv) {

define_machine(powernv) {

	.name			= "PowerNV",

	.name			= "PowerNV",

	.probe			= pnv_probe,

	.probe			= pnv_probe,
@@ -297,6 +317,7 @@ define_machine(powernv) { 
	.setup_arch		= pnv_setup_arch,

	.setup_arch		= pnv_setup_arch,

	.init_IRQ		= pnv_init_IRQ,

	.init_IRQ		= pnv_init_IRQ,

	.show_cpuinfo		= pnv_show_cpuinfo,

	.show_cpuinfo		= pnv_show_cpuinfo,

	.get_proc_freq          = pnv_get_proc_freq,

	.progress		= pnv_progress,

	.progress		= pnv_progress,

	.machine_shutdown	= pnv_shutdown,

	.machine_shutdown	= pnv_shutdown,

	.power_save             = power7_idle,

	.power_save             = power7_idle,