linux-kernel - Is it possible that implement the SDIO with 1-bit and 4-bit mode based on GPIO within kernel ?

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Message-ID: <CADvmyBfCVh5HA_kTgZ_RdH=HN7oDou70GMj0K0_E2BPcBawa+g@mail.gmail.com>
Date:	Fri, 2 Mar 2012 21:30:41 +0800
From:	"peter.meng" <mengsanshui@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Is it possible that implement the SDIO with 1-bit and 4-bit mode
 based on GPIO within kernel ?

Hi

I just fond that the kernel implemented the SDIO with SPI mode based
on GPIO , but can't support 1-bit and 4-bit mode .
Is it possible that implement the SDIO with 1-bit and 4-bit mode based
on GPIO within kernel ?
If it yes please give me suggestion how to do it ?

Thank a lot .
Best Regards .
Peter Meng
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