linux-kernel - Re: [RFC PATCH v3 1/3] mmc: sprd: Add MMC host driver for Spreadtrum SoC

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Date:	Mon, 28 Sep 2015 15:37:43 +0800
From:	Shawn Lin <shawn.lin@...k-chips.com>
To:	Hongtao Wu <wuht06@...il.com>
Cc:	Ulf Hansson <ulf.hansson@...aro.org>, shawn.lin@...k-chips.com,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Paweł Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Orson.Zhai@...eadtrum.com" <Orson.Zhai@...eadtrum.com>,
	"Chunyan.Zhang@...eadtrum.com" <Chunyan.Zhang@...eadtrum.com>,
	"Jason.Wu@...eadtrum.com" <Jason.Wu@...eadtrum.com>
Subject: Re: [RFC PATCH v3 1/3] mmc: sprd: Add MMC host driver for Spreadtrum
 SoC

On 2015/9/28 15:18, Hongtao Wu wrote:
>  >>
>
> On Thu, Sep 10, 2015 at 9:28 PM, Ulf Hansson <ulf.hansson@...aro.org
> <mailto:ulf.hansson@...aro.org>> wrote:
>  >
>  > On 14 August 2015 at 18:55, Hongtao Wu <wuht06@...il.com
> <mailto:wuht06@...il.com>> wrote:

[...]

>
> Yes, most of this data can be removed, such as caps, caps2, base_clk.
> However ocr_avail and signal_default_voltage are useful for us.
> We can't fetch ocr_avail from external regulator via
> mmc_regulator_get_supply,
> because our regulator driver can't supply mmc_regulator_get_ocrmask()
> interface for MMC driver.

Sorry for the noise but... IMO, your need to quirk your regulator driver 
stuffs rather than mmc.

> And sometimes our external regulator can not supply 3.0v or 1.8v default
> signal voltage that we expect. So this 3.0v or 1.8v default signal
> voltage are
> mandatory.
>



-- 
Best Regards
Shawn Lin

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