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Date:   Thu, 5 May 2022 22:40:22 -0500
From:   Bjorn Andersson <bjorn.andersson@linaro.org>
To:     Stephen Boyd <swboyd@chromium.org>
Cc:     Andy Gross <agross@kernel.org>, linux-kernel@vger.kernel.org,
        patches@lists.linux.dev, linux-arm-msm@vger.kernel.org,
        Benson Leung <bleung@chromium.org>,
        Guenter Roeck <groeck@chromium.org>,
        Douglas Anderson <dianders@chromium.org>,
        Hsin-Yi Wang <hsinyi@chromium.org>,
        "Joseph S. Barrera III" <joebar@chromium.org>
Subject: Re: [PATCH] arm64: dts: qcom: sc7180-trogdor: Remove cros-ec
 keyboard from detachables
Message-ID: <YnSYppSYwaoZRXb4@builder.lan>
References: <20220426225748.324759-1-swboyd@chromium.org>
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On Tue 26 Apr 17:57 CDT 2022, Stephen Boyd wrote:

> Trogdor devices that have a detachable keyboard still have a
> non-detachable keyboard input device present because we include the
> cros-ec-keyboard.dtsi snippet in the top-level sc7180-trogdor.dtsi file
> that every variant board includes. We do this because the
> keyboard-controller node also provides some buttons like the power
> button and volume buttons. Unfortunately, this means we register a
> keyboard input device that doesn't do anything on boards with a
> detachable keyboard. Let's delete the rows/columns properties of the
> device node to indicate that there isn't a matrix keyboard on these
> boards.
> 

As this seems to directly relate to the final design of each device,
would it make sense to push out the &keyboard_controller from
trogdor.dtsi? Or do you think it would be too much duplication for it to
be worth it?

Regards,
Bjorn

> Cc: Benson Leung <bleung@chromium.org>
> Cc: Guenter Roeck <groeck@chromium.org>
> Cc: Douglas Anderson <dianders@chromium.org>
> Cc: Hsin-Yi Wang <hsinyi@chromium.org>
> Cc: "Joseph S. Barrera III" <joebar@chromium.org>
> Signed-off-by: Stephen Boyd <swboyd@chromium.org>
> ---
>  arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi   | 5 +++++
>  arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi | 5 +++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> index c81805ef2250..4173623cc241 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> @@ -119,6 +119,11 @@ &i2c9 {
>  	status = "disabled";
>  };
>  
> +&keyboard_controller {
> +	/delete-property/keypad,num-rows;
> +	/delete-property/keypad,num-columns;
> +};
> +
>  &panel {
>  	compatible = "boe,nv110wtm-n61";
>  };
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi
> index bff2b556cc75..7205062e88b4 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi
> @@ -121,6 +121,11 @@ &camcc {
>  	status = "okay";
>  };
>  
> +&keyboard_controller {
> +	/delete-property/keypad,num-rows;
> +	/delete-property/keypad,num-columns;
> +};
> +
>  &panel {
>  	compatible = "samsung,atna33xc20";
>  	enable-gpios = <&tlmm 12 GPIO_ACTIVE_HIGH>;
> -- 
> https://chromeos.dev
>