linux-kernel - Re: [PATCH] misc: rtsx: Add support new chip rts5228 mmc: rtsx: Add support MMC_CAP2_NO

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Date:   Mon, 20 Jul 2020 16:15:18 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     ricky_wu@...ltek.com
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        Ulf Hansson <ulf.hansson@...aro.org>, rui_feng@...lsil.com.cn,
        Bjorn Helgaas <bhelgaas@...gle.com>, kdlnx@...h.eu,
        Rui Miguel Silva <rmfrfs@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH] misc: rtsx: Add support new chip rts5228 mmc: rtsx: Add
 support MMC_CAP2_NO_MMC

On Mon, Jul 6, 2020 at 9:03 AM <ricky_wu@...ltek.com> wrote:

>  drivers/misc/cardreader/Makefile   |   2 +-
>  drivers/misc/cardreader/rts5228.c  | 740 +++++++++++++++++++++++++++++
>  drivers/misc/cardreader/rts5228.h  | 168 +++++++
>  drivers/misc/cardreader/rtsx_pcr.c |  89 ++--
>  drivers/misc/cardreader/rtsx_pcr.h |   5 +

This drivers/misc/cardreader business is a big confusion for my mind.

Is it really that fantastic that it needs to be a unique special case?

To me it looks like a drivers/mfd thing which should have separate
drivers/regulator/rts5228.c (LDOs)
drivers/clk/rts5228.c (clocks)
subdrivers.

See for example drivers/mfd/sta2x11-mfd.c thay spawns a few
devices off a PCI card.

Yours,
Linus Walleij