linux-kernel - Re: [PATCH v2 10/17] dt-bindings: spi: add bindings for microchip mpfs spi

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Message-ID: <Ybx3+3QaVe2lCcQP@sirena.org.uk>
Date:   Fri, 17 Dec 2021 11:43:55 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Conor.Dooley@...rochip.com
Cc:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        robh+dt@...nel.org, jassisinghbrar@...il.com,
        paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, a.zummo@...ertech.it,
        alexandre.belloni@...tlin.com, gregkh@...uxfoundation.org,
        thierry.reding@...il.com, u.kleine-koenig@...gutronix.de,
        lee.jones@...aro.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-usb@...r.kernel.org, krzysztof.kozlowski@...onical.com,
        geert@...ux-m68k.org, bin.meng@...driver.com, heiko@...ech.de,
        Lewis.Hanly@...rochip.com, Daire.McNamara@...rochip.com,
        Ivan.Griffin@...rochip.com, atish.patra@....com
Subject: Re: [PATCH v2 10/17] dt-bindings: spi: add bindings for microchip
 mpfs spi

On Fri, Dec 17, 2021 at 11:40:29AM +0000, Conor.Dooley@...rochip.com wrote:
> On 17/12/2021 11:17, Mark Brown wrote:

>  > Why do you need this property in the DT - isn't the number of chip
>  > selects in the IP a fixes property?

> Nope! It's an IP that's intended for use in FPGAs so the number of 
> selects may (and does) vary based on implementation.

That doesn't explain why the number is needed in the binding - why do
you need this property in the DT?

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