linux-kernel - Re: [PATCH 2/3] spi: dt-bindings: Add num-cs property for mpfs-spi

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Date: Fri, 3 May 2024 16:46:13 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Prajna.Rajendrakumar@...rochip.com, broonie@...nel.org
Cc: linux-spi@...r.kernel.org, linux-riscv@...ts.infradead.org,
 Conor.Dooley@...rochip.com, devicetree@...r.kernel.org, robh@...nel.org,
 linux-kernel@...r.kernel.org, krzk+dt@...nel.org,
 Valentina.FernandezAlanis@...rochip.com, Daire.McNamara@...rochip.com
Subject: Re: [PATCH 2/3] spi: dt-bindings: Add num-cs property for mpfs-spi

On 03/05/2024 14:54, Prajna.Rajendrakumar@...rochip.com wrote:
>>
>>> +  - if:
>>> +      properties:
>>> +        compatible:
>>> +          contains:
>>> +            const: microchip,mpfs-spi
>>> +      not:
>>> +        required:
>>> +          - cs-gpios
>>
>> I don't understand what you are expressing here. Did you actually
>> validate it that it achieves exactly what you want?
> 
> Since the controller supports only one chip select, the num-cs should
> default to 1 and cannot exceed 1 unless GPIOs are used as chip selects.

That's not really the answer... or you want to say you did not test it?

Best regards,
Krzysztof