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

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Date:	Mon, 21 Jan 2013 21:25:51 +0100
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	arnd@...db.de, linus.walleij@...ricsson.com,
	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 21 January 2013 15:06, Lee Jones <lee.jones@...aro.org> wrote:
> 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?

Not exactly this version of the patch, but another one has has been
merged through Russell's patch tracker. Available for 3.9.

>
>>  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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