linux-kernel - Re: [PATCH] [V2] mmc: rtsx: Add SD Express mode support for RTS5261

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Date:   Fri, 22 May 2020 11:16:46 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     ulf.hansson@...aro.org
Cc:     rui_feng@...lsil.com.cn, arnd@...db.de,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [V2] mmc: rtsx: Add SD Express mode support for RTS5261

On Tue, May 19, 2020 at 03:59:23PM +0800, rui_feng@...lsil.com.cn wrote:
> From: rui_feng <rui_feng@...lsil.com.cn>
> 
> RTS5261 support legacy SD mode and SD Express mode.
> In SD7.x, SD association introduce SD Express as a new mode.
> SD Express mode is distinguished by CMD8.
> Therefore, CMD8 has new bit for SD Express.
> SD Express is based on PCIe/NVMe.
> RTS5261 uses CMD8 to switch to SD Express mode.
> 
> Signed-off-by: rui_feng <rui_feng@...lsil.com.cn>
> ---
> v2: remove config option MISC_RTSX_PCI_SD_EXPRESS 
> ---
> 
>  drivers/misc/cardreader/rts5261.c  |  5 ++++
>  drivers/misc/cardreader/rts5261.h  | 23 ----------------
>  drivers/misc/cardreader/rtsx_pcr.c |  5 ++++
>  drivers/mmc/core/sd_ops.c          |  9 ++++++-
>  drivers/mmc/host/rtsx_pci_sdmmc.c  | 43 ++++++++++++++++++++++++++++++
>  include/linux/mmc/host.h           |  1 +
>  include/linux/rtsx_pci.h           | 27 +++++++++++++++++++
>  7 files changed, 89 insertions(+), 24 deletions(-)

If I can get an ack from the MMC maintainer, I can take this in my
tree...

{hint}

thanks,

greg k-h