linux-kernel - Re: [PATCH v1 1/1] spi: pxa2xx: Move PXA SSP bindings to the correct folder

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Date: Tue, 21 May 2024 17:02:02 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Rob Herring <robh@...nel.org>
Cc: Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
	linux-spi@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Subject: Re: [PATCH v1 1/1] spi: pxa2xx: Move PXA SSP bindings to the correct
 folder

On Mon, May 20, 2024 at 03:36:00PM -0500, Rob Herring wrote:
> On Mon, May 20, 2024 at 01:47:26PM +0300, Andy Shevchenko wrote:
> > On Fri, May 17, 2024 at 03:19:51PM -0500, Rob Herring wrote:
> > > On Fri, May 17, 2024 at 2:58 PM Andy Shevchenko
> > > <andriy.shevchenko@...ux.intel.com> wrote:
> > > > On Fri, May 17, 2024 at 06:24:37PM +0100, Mark Brown wrote:
> > > > > On Fri, May 17, 2024 at 08:11:03PM +0300, Andy Shevchenko wrote:

..

> > > > > > SSP stands for Serial Synchronous Protocol and has nothing to do with
> > > > > > UART, also known as USART, where 'A' stands for Asynchronous.
> > > > > >
> > > > > > Move the SSP bindings to where it belongs.
> > > > >
> > > > > It's a serial device which is also used for other applications (the
> > > > > other one upstream being audio) so I can see where the current binding
> > > > > comes from and it's not super obvious that spi is especially better
> > > > > here.
> > > >
> > > > Hmm... okay. Then it's question to DT people. Consider this as a report.
> > > > Because UART (aka serial) is definitely not the place for SPI/SSP bindings
> > > > either.
> > > 
> > > Move it when it is converted.
> > 
> > The problem is that somebody added a binding (in YAML) for SPI PXA2xx
> > in the spi/ folder while this one kept unconverted.
> 
> Ah, well that detail was missed.
> 
> > 
> > If it dangles more, it might be that we will have two asynchronous bindings
> > for the co-existed drivers.
> 
> Looks like all that is needed is adding the compatible strings and 
> 'dmas' property to spi/marvell,mmp2-ssp.yaml. The examples in the old 
> binding have other stuff, but looks like that's garbage.

I'm not an expert in DT, anybody to join them in a nicest possible way?

-- 
With Best Regards,
Andy Shevchenko