linux-kernel - Re: [PATCH v5 5/6] exynos: cpuidle: do not allow cpuidle registration for Exynos5420

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Message-ID: <5375311B.2010202@gmail.com>
Date:	Thu, 15 May 2014 23:26:51 +0200
From:	Tomasz Figa <tomasz.figa@...il.com>
To:	Chander Kashyap <chander.kashyap@...aro.org>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
CC:	daniel.lezcano@...aro.org, lorenzo.pieralisi@....com,
	rjw@...ysocki.net, kgene.kim@...sung.com,
	Chander Kashyap <k.chander@...sung.com>
Subject: Re: [PATCH v5 5/6] exynos: cpuidle: do not allow cpuidle registration
 for Exynos5420

Hi Chander,

On 14.05.2014 10:03, Chander Kashyap wrote:
> Exynos5420 is big.Little Soc. It uses cpuidle-big-litle generic cpuidle driver.
> Hence do not allow exynos cpuidle driver registration for Exynos5420.
> 
> Signed-off-by: Chander Kashyap <chander.kashyap@...aro.org>
> Signed-off-by: Chander Kashyap <k.chander@...sung.com>
> Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
>  arch/arm/mach-exynos/cpuidle.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
> index 3dd385e..807a386 100644
> --- a/arch/arm/mach-exynos/cpuidle.c
> +++ b/arch/arm/mach-exynos/cpuidle.c
> @@ -218,6 +218,9 @@ static int exynos_cpuidle_probe(struct platform_device *pdev)
>  	int cpu_id, ret;
>  	struct cpuidle_device *device;
>  
> +	if (soc_is_exynos5420())
> +		return -ENODEV;
> +
>  	if (soc_is_exynos5250())
>  		exynos5_core_down_clk();
>  
> 

Why not put this in exynos.c in exynos_dt_machine_init(), so
exynos_cpuidle_init() is called only if not running on Exynos5420?

Best regards,
Tomasz
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