linux-kernel - Re: [PATCH V7 7/7] powernv/cpuidle: Enable idle powernv cpu to call into the cpuidle framework.

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Message-ID: <527AB066.6050805@linaro.org>
Date:	Wed, 06 Nov 2013 22:11:02 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>,
	benh@...nel.crashing.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
CC:	michael@...erman.id.au, scottwood@...escale.com,
	srivatsa.bhat@...ux.vnet.ibm.com, preeti@...ux.vnet.ibm.com,
	linux-pm@...ts.linux-foundation.org, svaidy@...ux.vnet.ibm.com
Subject: Re: [PATCH V7 7/7] powernv/cpuidle: Enable idle powernv cpu to call
 into the cpuidle framework.

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@...ux.vnet.ibm.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.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,
>


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