linux-kernel - Re: [PATCH v3 2/3] arm: gpmc: Low power transition support

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Message-ID: <87bobgz5m9.fsf@linaro.org>
Date:	Tue, 19 Feb 2013 07:27:10 -0800
From:	Kevin Hilman <khilman@...aro.org>
To:	Philip Avinash <avinashphilip@...com>
Cc:	<tony@...mide.com>, <linux@....linux.org.uk>,
	<dwmw2@...radead.org>, <afzal@...com>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>,
	<nsekhar@...com>, <gururaja.hebbar@...com>, <hvaibhav@...com>
Subject: Re: [PATCH v3 2/3] arm: gpmc: Low power transition support

Philip Avinash <avinashphilip@...com> writes:

> With GPMC converted to platform driver recently, adds low power
> transition support in driver itself.
>
> Signed-off-by: Philip Avinash <avinashphilip@...com>
> ---
> Changes since v1:
> 	Module disable & enable added using pm_runtime support.
>
>  arch/arm/mach-omap2/gpmc.c |   20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
> index b1cd6c1..cc57988 100644
> --- a/arch/arm/mach-omap2/gpmc.c
> +++ b/arch/arm/mach-omap2/gpmc.c
> @@ -1361,9 +1361,29 @@ static __devexit int gpmc_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_PM

This should be CONFIG_PM_SLEEP for suspend/resume specific stuff.

> +static int gpmc_suspend(struct platform_device *pdev, pm_message_t state)
> +{
> +	omap3_gpmc_save_context();
> +	pm_runtime_put_sync(&pdev->dev);
> +	return 0;
> +}
> +
> +static int gpmc_resume(struct platform_device *pdev)
> +{
> +	pm_runtime_get_sync(&pdev->dev);
> +	omap3_gpmc_restore_context();
> +	return 0;
> +}
> +#endif
> +
>  static struct platform_driver gpmc_driver = {
>  	.probe		= gpmc_probe,
>  	.remove		= __devexit_p(gpmc_remove),
> +#ifdef CONFIG_PM
> +	.suspend	= gpmc_suspend,
> +	.resume		= gpmc_resume,
> +#endif

These are the legacy PM operations, you need to use the ones in the
drivers struct dev_pm_ops.

>  	.driver		= {
>  		.name	= DEVICE_NAME,
>  		.owner	= THIS_MODULE,

Kevin
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