linux-kernel - Re: [PATCH V3 1/3] arm64: dts: sc7280: Add QSPI node

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Message-ID: <162284315655.1835121.6817703229350764867@swboyd.mtv.corp.google.com>
Date:   Fri, 04 Jun 2021 14:45:56 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Roja Rani Yarubandi <rojay@...eaurora.org>, agross@...nel.org,
        bjorn.andersson@...aro.org, robh+dt@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rajendra Nayak <rnayak@...eaurora.org>,
        saiprakash.ranjan@...eaurora.org, msavaliy@....qualcomm.com,
        Roja Rani Yarubandi <rojay@...eaurora.org>
Subject: Re: [PATCH V3 1/3] arm64: dts: sc7280: Add QSPI node

Quoting Roja Rani Yarubandi (2021-06-04 06:54:37)
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dts b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> index 3900cfc09562..d0edffc15736 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> @@ -268,6 +268,22 @@ pmr735b_die_temp {
>                 };
>  };
>  
> +&qspi {
> +       status = "okay";
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&qspi_clk>, <&qspi_cs0>, <&qspi_data01>;
> +
> +       flash@0 {
> +               compatible = "jedec,spi-nor";
> +               reg = <0>;
> +
> +               /* TODO: Increase frequency after testing */

Is this going to change? Please set it to 37.5MHz if that's the max
supported.

> +               spi-max-frequency = <25000000>;
> +               spi-tx-bus-width = <2>;
> +               spi-rx-bus-width = <2>;
> +       };
> +};
> +
>  &qupv3_id_0 {
>         status = "okay";
>  };