linux-kernel - Re: [PATCH 1/2] MMC: PM: add suspend/resume in atmel-mci

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Message-ID: <20110629160110.GD2760@legolas.emea.dhcp.ti.com>
Date:	Wed, 29 Jun 2011 19:01:11 +0300
From:	Felipe Balbi <balbi@...com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	cjb@...top.org, linux-mmc@...r.kernel.org,
	hans-christian.egtvedt@...el.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...32linux.org,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH 1/2] MMC: PM: add suspend/resume in atmel-mci

Hi,

On Wed, Jun 29, 2011 at 06:54:19PM +0200, Nicolas Ferre wrote:
> Take care of slots while going to suspend state.
> 
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> ---
>  drivers/mmc/host/atmel-mci.c |   51 ++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 51 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index aa8039f..c414ebe 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -1878,8 +1878,59 @@ static int __exit atmci_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_PM
> +static int atmci_suspend(struct platform_device *pdev, pm_message_t mesg)
> +{
> +	struct atmel_mci *host = platform_get_drvdata(pdev);
> +	struct atmel_mci_slot *slot;
> +	int i, ret;
> +
> +	 for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {
> +		slot = host->slot[i];
> +		if (!slot)
> +			continue;
> +		ret = mmc_suspend_host(slot->mmc);
> +		if (ret < 0) {
> +			while (--i >= 0) {
> +				slot = host->slot[i];
> +				if (slot)
> +					mmc_resume_host(host->slot[i]->mmc);
> +			}
> +			return ret;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int atmci_resume(struct platform_device *pdev)
> +{
> +	struct atmel_mci *host = platform_get_drvdata(pdev);
> +	struct atmel_mci_slot *slot;
> +	int i, ret;
> +
> +	for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {
> +		slot = host->slot[i];
> +		if (!slot)
> +			continue;
> +		ret = mmc_resume_host(slot->mmc);
> +		if (ret < 0)
> +			return ret;
> +	}
> +
> +	return 0;
> +}
> +#else
> +#define atmci_suspend	NULL
> +#define atmci_resume	NULL
> +#endif
> +
> +
> +
>  static struct platform_driver atmci_driver = {
>  	.remove		= __exit_p(atmci_remove),
> +	.suspend	= atmci_suspend,
> +	.resume		= atmci_resume,

should this be using dev_pm_ops instead ?

-- 
balbi

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