linux-kernel - Re: [PATCH 1/8] mmc: mmci: Move ios_handler functionality into the driver

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Date:	Mon, 21 Jan 2013 14:06:26 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	arnd@...db.de, linus.walleij@...ricsson.com,
	ulf.hansson@...aro.org, Chris Ball <cjb@...top.org>,
	Russell King <rmk+kernel@....linux.org.uk>
Subject: Re: [PATCH 1/8] mmc: mmci: Move ios_handler functionality into the
 driver

On Thu, 13 Dec 2012, Lee Jones wrote:

> There are currently two instances of the ios_handler being used.
> Both of which mearly toy with some regulator settings. Now there
> is a GPIO regulator API, we can use that instead, and lessen the
> per platform burden. By doing this, we also become more Device
> Tree compatible.
> 
> Cc: Chris Ball <cjb@...top.org>
> Cc: Russell King <rmk+kernel@....linux.org.uk>
> Acked-by: Ulf Hansson <ulf.hansson@...ricsson.com>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>

Any more news on this one?

>  drivers/mmc/host/mmci.c |   22 ++++++++++++++++++++++
>  drivers/mmc/host/mmci.h |    1 +
>  2 files changed, 23 insertions(+)
> 
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index edc3e9b..d45c931 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -1091,6 +1091,16 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>  	case MMC_POWER_OFF:
>  		if (host->vcc)
>  			ret = mmc_regulator_set_ocr(mmc, host->vcc, 0);
> +
> +		if (host->vqmmc) {
> +			if (regulator_is_enabled(host->vqmmc)) {
> +				ret = regulator_disable(host->vqmmc);
> +				if (ret < 0)
> +					dev_warn(mmc_dev(mmc),
> +						 "unable to disable vmmc-ios\n");
> +			}
> +		}
> +
>  		break;
>  	case MMC_POWER_UP:
>  		if (host->vcc) {
> @@ -1115,6 +1125,14 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>  
>  		break;
>  	case MMC_POWER_ON:
> +		if (host->vqmmc)
> +			if (!regulator_is_enabled(host->vqmmc)) {
> +				ret = regulator_enable(host->vqmmc);
> +				if (ret < 0)
> +					dev_warn(mmc_dev(mmc),
> +						 "unable to enable vmmc-ios\n");
> +			}
> +
>  		pwr |= MCI_PWR_ON;
>  		break;
>  	}
> @@ -1379,6 +1397,10 @@ static int __devinit mmci_probe(struct amba_device *dev,
>  				 "(using regulator instead)\n");
>  		}
>  	}
> +
> +	host->vqmmc = regulator_get(&dev->dev, "vqmmc");
> +	if (IS_ERR(host->vqmmc))
> +		host->vqmmc = NULL;
>  #endif
>  	/* Fall back to platform data if no regulator is found */
>  	if (host->vcc == NULL)
> diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
> index d437ccf..b87d9e2 100644
> --- a/drivers/mmc/host/mmci.h
> +++ b/drivers/mmc/host/mmci.h
> @@ -194,6 +194,7 @@ struct mmci_host {
>  	struct sg_mapping_iter	sg_miter;
>  	unsigned int		size;
>  	struct regulator	*vcc;
> +	struct regulator	*vqmmc;
>  
>  #ifdef CONFIG_DMA_ENGINE
>  	/* DMA stuff */

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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