linux-kernel - Re: How about the MMC/SDIO host controller standard under Linux ?

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Message-ID: <20120320002955.GA26604@codeaurora.org>
Date:	Mon, 19 Mar 2012 17:29:55 -0700
From:	David Brown <davidb@...eaurora.org>
To:	"peter.meng" <mengsanshui@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How about the MMC/SDIO host controller standard under Linux ?

On Mon, Mar 19, 2012 at 10:39:29AM +0800, peter.meng wrote:

> I see the drivers/mmc/host/sdhci.h define the common register as
> describe within
> Part_A2_SD_Host_Controller_Simplified_Specification_Ver3.00_Final_110225.pdf
> In this case all command related access register is common .(sdhci-xxx.c)
> Does this mean all sdhci-xxx.c that will support SD host controller  standard ?

> I see most code  such as s3cmci.c ,msm_sdcc.c that has their only
> private register that access by such as mmc_host_ops->request function
> .
> I want to know whether this mean these host controller doesn't support
>  SD host controller standard ?

There are numerous SD host controllers that aren't SDHCI.

David

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