linux-kernel - Re: [PATCH] staging: rtsx: Add support for RTS5260

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Message-ID: <20171013102103.GA6603@kroah.com>
Date:   Fri, 13 Oct 2017 12:21:03 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     devel@...verdev.osuosl.org, ricky_wu@...ltek.com,
        linux-kernel@...r.kernel.org, rui_feng@...lsil.com.cn
Subject: Re: [PATCH] staging: rtsx: Add support for RTS5260

On Fri, Oct 13, 2017 at 11:11:15AM +0100, Lee Jones wrote:
> On Fri, 13 Oct 2017, Greg KH wrote:
> 
> > On Fri, Oct 13, 2017 at 10:54:22AM +0100, Lee Jones wrote:
> > > On Fri, 13 Oct 2017, Greg KH wrote:
> > > 
> > > > On Fri, Oct 13, 2017 at 04:50:35PM +0800, rui_feng@...lsil.com.cn wrote:
> > > > > From: rui_feng <rui_feng@...lsil.com.cn>
> > > > > 
> > > > > Add support for new chip rts5260.
> > > > > In order to support rts5260，the definitions of some internal
> > > > > registers and workflow have to be modified and are different from its
> > > > > predecessors and OCP function is added for RTS5260.
> > > > > So we need this patch to ensure RTS5260 can work.
> > > > > 
> > > > > Signed-off-by: Rui Feng <rui_feng@...lsil.com.cn>
> > > > 
> > > > Your from and signed-off-by name does not match :(
> > > > 
> > > > > ---
> > > > >  drivers/mfd/Makefile              |   4 +
> > > > >  drivers/mfd/rtsx_pcr.c            | 127 ++++++-
> > > > >  drivers/mfd/rtsx_pcr.h            |  12 +
> > > > >  drivers/staging/Kconfig           |   2 +
> > > > >  drivers/staging/rts5260/Kconfig   |   6 +
> > > > >  drivers/staging/rts5260/rts5260.c | 748 ++++++++++++++++++++++++++++++++++++++
> > > > >  drivers/staging/rts5260/rts5260.h |  45 +++
> > > > >  include/linux/mfd/rtsx_pci.h      | 234 +++++++++++-
> > > > 
> > > > I do not see a reason why this is a staging driver.  Where is the TODO
> > > > file listing what needs to be done to get it out of staging?  Why can it
> > > > not just go into the "real" part of the kernel?
> > > 
> > > It's not a staging driver.  Rui's focus appears to be to have this
> > > driver accepted into Mainline by hook or by crock.  He's tried MFD,
> > > Misc and now Staging!
> > 
> > Yeah, I've watched it too :)
> > 
> > > Background:
> > > 
> > > There are a number of drivers in this family which currently reside in
> > > MFD.  These were accepted before my time.  After a recent review I've
> > > made the decision that these aren't MFD drivers at all.
> > > 
> > > MFD drivers are ones which aid in registering and setting up shared
> > > resources for sub-devices which reside on the same piece of silicon.
> > > This driver does basically none of that.  Instead it *is* the (what we
> > > describe above as) sub-device.  It does everything.
> > 
> > I agree with your assessment.
> > 
> > > In the absence of a subsystem which covers this type of device, I
> > > suggested Misk as a good location to place these drivers.
> 
> Sorry, that should have been "Misc"
> 
> > What type of device is this thing?  I can't seem to figure that out.  If
> > we can determine that, then we can find the proper place for it in the
> > kernel.
> 
> It's a card (MMC, (u)SD, etc) reader.

Ok, how does it hook up to the hardware to talk to the reader?

And we have other card readers in drivers/misc/ so maybe that is the
right place for it, depending on the api to the hardware.

thanks,

greg k-h