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

From: Dong, Chuanxiao
Date: Sun Jan 09 2011 - 21:46:57 EST


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@xxxxxxxxxxxxxxx
> [mailto:linux-mmc-owner@xxxxxxxxxxxxxxx] On Behalf Of Chuanxiao Dong
> Sent: Monday, December 27, 2010 6:13 PM
> To: linux-mmc@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx; cjb@xxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx
> 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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