Patchwork [V7,7/7] powernv/cpuidle: Enable idle powernv cpu to call into the cpuidle framework.

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Submitter Deepthi Dharwar
Date Oct. 29, 2013, 11:02 a.m.
Message ID <20131029110201.31547.55088.stgit@deepthi.in.ibm.com>
Download mbox | patch
Permalink /patch/286791/
State Superseded
Headers show

Comments

Deepthi Dharwar - Oct. 29, 2013, 11:02 a.m.
This patch enables idle cpu on the powernv platform  to hook on to the cpuidle
framework, if available, else call on to default idle platform
code.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/setup.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)
Daniel Lezcano - Nov. 6, 2013, 9:11 p.m.
On 10/29/2013 12:02 PM, Deepthi Dharwar wrote:
> This patch enables idle cpu on the powernv platform  to hook on to the cpuidle
> framework, if available, else call on to default idle platform
> code.
>
> Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

> ---
>   arch/powerpc/platforms/powernv/setup.c |   13 ++++++++++++-
>   1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
> index e239dcf..42a6ba0 100644
> --- a/arch/powerpc/platforms/powernv/setup.c
> +++ b/arch/powerpc/platforms/powernv/setup.c
> @@ -25,6 +25,7 @@
>   #include <linux/of.h>
>   #include <linux/interrupt.h>
>   #include <linux/bug.h>
> +#include <linux/cpuidle.h>
>
>   #include <asm/machdep.h>
>   #include <asm/firmware.h>
> @@ -192,6 +193,16 @@ static void __init pnv_setup_machdep_rtas(void)
>   }
>   #endif /* CONFIG_PPC_POWERNV_RTAS */
>
> +void powernv_idle(void)
> +{
> +	/* Hook to cpuidle framework if available, else
> +	 * call on default platform idle code
> +	 */
> +	if (cpuidle_idle_call()) {
> +		power7_idle();
> +	}
> +}
> +
>   static int __init pnv_probe(void)
>   {
>   	unsigned long root = of_get_flat_dt_root();
> @@ -222,7 +233,7 @@ define_machine(powernv) {
>   	.show_cpuinfo		= pnv_show_cpuinfo,
>   	.progress		= pnv_progress,
>   	.machine_shutdown	= pnv_shutdown,
> -	.power_save             = power7_idle,
> +	.power_save             = powernv_idle,
>   	.calibrate_decr		= generic_calibrate_decr,
>   #ifdef CONFIG_KEXEC
>   	.kexec_cpu_down		= pnv_kexec_cpu_down,
>

Patch

diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index e239dcf..42a6ba0 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -25,6 +25,7 @@ 
 #include <linux/of.h>
 #include <linux/interrupt.h>
 #include <linux/bug.h>
+#include <linux/cpuidle.h>
 
 #include <asm/machdep.h>
 #include <asm/firmware.h>
@@ -192,6 +193,16 @@  static void __init pnv_setup_machdep_rtas(void)
 }
 #endif /* CONFIG_PPC_POWERNV_RTAS */
 
+void powernv_idle(void)
+{
+	/* Hook to cpuidle framework if available, else
+	 * call on default platform idle code
+	 */
+	if (cpuidle_idle_call()) {
+		power7_idle();
+	}
+}
+
 static int __init pnv_probe(void)
 {
 	unsigned long root = of_get_flat_dt_root();
@@ -222,7 +233,7 @@  define_machine(powernv) {
 	.show_cpuinfo		= pnv_show_cpuinfo,
 	.progress		= pnv_progress,
 	.machine_shutdown	= pnv_shutdown,
-	.power_save             = power7_idle,
+	.power_save             = powernv_idle,
 	.calibrate_decr		= generic_calibrate_decr,
 #ifdef CONFIG_KEXEC
 	.kexec_cpu_down		= pnv_kexec_cpu_down,