linux-kernel - Re: [PATCH RFC 2/2] dt-bindings: add binding documentation for Allwinner CSI

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Date:   Wed, 19 Jul 2017 14:21:20 +0800
From:   Yong <yong.deng@...ewell.com>
To:     Baruch Siach <baruch@...s.co.il>
Cc:     mchehab@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        maxime.ripard@...e-electrons.com, wens@...e.org,
        hans.verkuil@...co.com, peter.griffin@...aro.org,
        hugues.fruchet@...com, krzk@...nel.org, bparrot@...com,
        arnd@...db.de, jean-christophe.trotin@...com,
        benjamin.gaignard@...aro.org, tiffany.lin@...iatek.com,
        kamil@...as.org, kieran+renesas@...uared.org.uk,
        andrew-ct.chen@...iatek.com, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 2/2] dt-bindings: add binding documentation for
 Allwinner CSI

Hi Baruch,

On Wed, 19 Jul 2017 07:49:23 +0300
Baruch Siach <baruch@...s.co.il> wrote:

> Hi Yong,
> 
> On Wed, Jul 19, 2017 at 09:22:49AM +0800, Yong wrote:
> > On Tue, 18 Jul 2017 14:55:30 +0300
> > Baruch Siach <baruch@...s.co.il> wrote:
> > > I am trying to get this driver working on the Olimex A33 OLinuXino. I 
> > > didn't get it working yet, but I had some progress. See the comment below 
> > > on one issue I encountered.
> > > 
> > > On Tue, Jun 27, 2017 at 07:07:34PM +0800, Yong Deng wrote:
> > > > Add binding documentation for Allwinner CSI.
> > > > 
> > > > Signed-off-by: Yong Deng <yong.deng@...ewell.com>
> > > > ---
> 
> [...]
> 
> > > > +Example:
> > > > +
> > > > +	csi1: csi@...b4000 {
> > > > +		compatible = "allwinner,sun8i-v3s-csi";
> > > > +		reg = <0x01cb4000 0x1000>;
> > > 
> > > You use platform_get_resource_byname() to get this IO resource. This requires 
> > > adding mandatory
> > > 
> > >   reg-names = "csi";
> > > 
> > > But is it actually needed? Wouldn't a simple platform_get_resource() be 
> > > enough?
> > 
> > You are right.
> > This will be fixed in the next version.
> > I am waiting for more comments for the sunxi-csi.h. It's pleasure if
> > you have any suggestions about it.
> 
> You mean sunxi_csi.h, right?

Yes. My spelling mistake.

> 
> Why do you need the sunxi_csi_ops indirection? Do you expect to add 
> alternative implementations of these ops at some point?

I want to seperate the sunxi_video.c and sunxi_csi_v3s.c. 
sunxi_csi_v3s.c is Soc specific. Maybe there will be sunxi_csi_r40.c
in the futrue. But the sunxi_video.c and sunxi_csi.c are common.

> 
> baruch
> 
> -- 
>      http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch@...s.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -


Thanks,
Yong