linux-kernel - Re: [RFC PATCH] spi: dt-bindings: ti,qspi: convert to dtschema

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Date: Mon, 29 Apr 2024 12:40:31 +0530
From: Kousik Sanagavarapu <five231003@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-spi@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Shuah Khan <skhan@...uxfoundation.org>,
	Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: Re: [RFC PATCH] spi: dt-bindings: ti,qspi: convert to dtschema

On Mon, Apr 29, 2024 at 07:07:38AM +0200, Krzysztof Kozlowski wrote:
> On 28/04/2024 08:58, Kousik Sanagavarapu wrote:
> > Convert txt binding of TI's qspi controller (found on their omap SoCs) to
> > dtschema to allow for validation.

[...]

> > +  spi-max-frequency:
> > +    description: Maximum SPI clocking speed of the controller in Hz.
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> 
> 
> Are you sure that's actually needed? That's not a property of controller.

[...]

> > +        num-cs = <4>;
> > +        spi-max-frequency = <48000000>;
> 
> Drop. Are you sure driver parses it?

The driver does parse it though.  Looking at
drivers/spi/spi-ti-qspi.c::ti_qspi_probe(),

	if (!of_property_read_u32(np, "spi-max-frequency", &max_freq))
		host->max_speed_hz = max_freq;

So I included it in the dtschema as well.  Please let me know if
including it in the dtschema in this case is wrong.

Thanks