linux-kernel - Re: [PATCH V2] arm64: dts: qcom: sc7280: Add nodes for eMMC and SD card

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Message-ID: <161660145349.3012082.16210818967187877873@swboyd.mtv.corp.google.com>
Date:   Wed, 24 Mar 2021 08:57:33 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     sbhanu@...eaurora.org
Cc:     adrian.hunter@...el.com, robh+dt@...nel.org,
        ulf.hansson@...aro.org, asutoshd@...eaurora.org,
        stummala@...eaurora.org, vbadigan@...eaurora.org,
        rampraka@...eaurora.org, sayalil@...eaurora.org,
        sartgarg@...eaurora.org, rnayak@...eaurora.org,
        saiprakash.ranjan@...eaurora.org, sibis@...eaurora.org,
        cang@...eaurora.org, pragalla@...eaurora.org,
        nitirawa@...eaurora.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, agross@...nel.org,
        bjorn.andersson@...aro.org
Subject: Re: [PATCH V2] arm64: dts: qcom: sc7280: Add nodes for eMMC and SD card

Quoting sbhanu@...eaurora.org (2021-03-24 08:23:55)
> On 2021-03-23 12:31, Stephen Boyd wrote:
> > Quoting Shaik Sajida Bhanu (2021-03-20 11:17:00)
> >> +
> >> +                       bus-width = <8>;
> >> +                       non-removable;
> >> +                       supports-cqe;
> >> +                       no-sd;
> >> +                       no-sdio;
> >> +
> >> +                       max-frequency = <192000000>;
> > 
> > Is this necessary?
> yes, to avoid lower speed modes running with high clock rates.

Is it part of the DT binding? I don't see any mention of it.