linux-kernel - Re: [PATCH] spi: spi-geni-qcom: Add SPI driver support for GENI based QUP

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Message-ID: <CAD=FV=Us65kRtn6wtc+cr-ws0b1vYwARbqt0yY+T2BdSFPnfcg@mail.gmail.com>
Date:   Fri, 10 Aug 2018 09:49:37 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Dilip Kota <dkota@...eaurora.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        Sagar Dharia <sdharia@...eaurora.org>,
        Karthikeyan Ramasubramanian <kramasub@...eaurora.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "Mahadevan, Girish" <girishm@...eaurora.org>
Subject: Re: [PATCH] spi: spi-geni-qcom: Add SPI driver support for GENI based QUP

Hi,

On Fri, Aug 10, 2018 at 9:29 AM,  <dkota@...eaurora.org> wrote:
> Here are my couple of cents:
> SPI controller maximum frequency can be lesser than or equal to Clock
> framework's maximum
> frequency, so should not rely on the Clock framework.

You could make that argument on other SoCs perhaps, but from what I've
seen in Qualcomm clock drivers there is a hardcoded frequency plan
that takes into account how fast the IP blocks can go.

-Doug