linux-kernel - Re: [PATCH 12/14] arm64: dts: qcom: sc7180: Fix trogdor qspi pin config

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Message-ID: <43b74b3f-e607-ba55-a5fa-326fb4b5519d@linaro.org>
Date:   Fri, 7 Apr 2023 20:11:25 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Matthias Kaehlcke <mka@...omium.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-gpio@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-spi@...r.kernel.org, Andy Gross <agross@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/14] arm64: dts: qcom: sc7180: Fix trogdor qspi pin
 config

On 23/03/2023 18:30, Douglas Anderson wrote:
> In commit 7ec3e67307f8 ("arm64: dts: qcom: sc7180-trogdor: add initial
> trogdor and lazor dt") we specified the pull settings on the boot SPI
> (the qspi) data lines as pullups to "park" the lines. This seemed like
> the right thing to do, but I never really probed the lines to confirm.
> 


>  &qup_i2c2_default {
> @@ -1336,6 +1340,22 @@ p_sensor_int_l: p-sensor-int-l-state {
>  		bias-disable;
>  	};
>  
> +	qspi_sleep: qspi-sleep-state {
> +		pins = "gpio63", "gpio64", "gpio65", "gpio68";
> +
> +		/*
> +		 * When we're not actively transferring we want pins as GPIOs
> +		 * with output disabled so that the quad SPI IP block stops
> +		 * driving them. We rely on the normal pulls configured in
> +		 * the active state and don't redefine them here. Also note
> +		 * that we don't need the reverse (output-enable) in the
> +		 * normal mode since the "output-enable" only matters for
> +		 * GPIO function.
> +		 */
> +		function = "gpio";
> +		output-disable;

Doug,

I acked some of your patches, but I assumed you tested all this. It
turns out you never run dtbs_check on the patches you sent.

Best regards,
Krzysztof