linux-kernel - RE: [PATCH v6 0/3]mmc: implement eMMC4.4 standard HW reset feature

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Date:	Mon, 10 Jan 2011 10:46:11 +0800
From:	"Dong, Chuanxiao" <chuanxiao.dong@...el.com>
To:	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Chris Ball <cjb@...top.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: RE: [PATCH v6 0/3]mmc: implement eMMC4.4 standard HW reset feature

Hi Chris,
The HW ware reset patches have been pending for several weeks. The first version was sent at Oct.25th, and now I have updated them to be the version 6. So Chris, would you help me on this?. I want to know whether they are acceptable. And I am ready to fix all the comments from the community. Thanks a lot.

-Chuanxiao

> -----Original Message-----
> From: linux-mmc-owner@...r.kernel.org
> [mailto:linux-mmc-owner@...r.kernel.org] On Behalf Of Chuanxiao Dong
> Sent: Monday, December 27, 2010 6:13 PM
> To: linux-mmc@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org; cjb@...top.org; akpm@...ux-foundation.org
> Subject: [PATCH v6 0/3]mmc: implement eMMC4.4 standard HW reset feature
> 
> Hi all,
>    This is the version 6 of hardware reset feature implementation. When eMMC
>    card cannot response any command, signal RST_n can help to reset eMMC
>    card.
> 
>    patch1: enable HW reset capability if card supports.
>    patch2: do hardware reset if card occurs read/write/erase timeout
>    patch3: implement hwreset_emmc and reinit_emmc callbacks. In this patch,
>    hwreset_emmc callback will pull up/down the corresponded GPIO line number
>    to trigger RST_n signal.
> 
>    change log:
>    1. Move hardware_reset callback to mmc_bus_ops so that all kinds of host
>    controller can use hardware_reset callback to trigger RST_n signal.
>    Different host controller only needs to provide a GPIO line number to
>    this callback.
>    2. Add GPIO pull up/down part in hardware_reset callback.
>    3. Remove reset_emmc callback in sdhci_ops.
> 
> Thanks
> Chuanxiao
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