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

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Message-ID: <20171013101115.kjxduclaed2zzpzr@dell>
Date:   Fri, 13 Oct 2017 11:11:15 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Greg KH <gregkh@...uxfoundation.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, 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.

> Rui, what does this hardware do?  What is the interface between the
> hardware and userspace that this driver is creating?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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