linux-kernel - Re: [PATCH 2/3] mmc: use regulator_can_change_voltage() instead of regulator_count

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Date:	Fri, 01 Feb 2013 15:39:45 +0100
From:	Marek Szyprowski <m.szyprowski@...sung.com>
To:	Marek Szyprowski <m.szyprowski@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, Chris Ball <cjb@...top.org>,
	Kevin Liu <keyuan.liu@...il.com>
Subject: Re: [PATCH 2/3] mmc: use regulator_can_change_voltage() instead of
 regulator_count_voltages() hacks

Hello,

On 12/4/2012 3:01 PM, Marek Szyprowski wrote:
> mmc_regulator_set_ocr() depends on the ability of regulator to change the
> voltage value. When regulator cannot change its voltage output, some code is
> skipped to avoid reporting false errors on some boards, which use MMC hosts
> with fixed regulators (example: Samsung Goni and UniversalC210 boards).
>
> This patch replaces a hacky workaround based on regulator_count_voltages()
> value with the correct call to recently introduced
> regulator_can_change_voltage() function in regulators core.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>

Any chance to get this patch scheduled for v3.9?

> ---
>   drivers/mmc/core/core.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index aaed768..f5a0493 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1137,7 +1137,7 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
>   		 */
>   		voltage = regulator_get_voltage(supply);
>   
> -		if (regulator_count_voltages(supply) == 1)
> +		if (!regulator_can_change_voltage(supply))
>   			min_uV = max_uV = voltage;
>   
>   		if (voltage < 0)

Best regards
-- 
Marek Szyprowski
Samsung Poland R&D Center


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