linux-kernel - Re: [PATCH 0/2] arm64: dts: qcom: sm8650: mark gpio74 as reserved

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Date: Thu, 11 Jan 2024 11:55:39 -0800
From: Elliot Berman <quic_eberman@...cinc.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring
	<robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Georgi Djakov <djakov@...nel.org>
Subject: Re: [PATCH 0/2] arm64: dts: qcom: sm8650: mark gpio74 as reserved



On 1/11/2024 8:58 AM, Neil Armstrong wrote:
> The TLMM gpio74 is also used to communicate with the secure NFC
> on-board module, some variants of the SM8650 QRD & MTP boards requires
> this GPIO to be dedicated to the secure firmware and set reserved
> in order to successfully initialize the TLMM GPIOs from HLOS (Linux).
> On the other boards this GPIO is unused so it's still safe to mark
> the GPIO as reserved.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>

Double checked these and no others currently are also reserved.

Reviewed-by: Elliot Berman <quic_eberman@...cinc.com>

> ---
> Neil Armstrong (2):
>       arm64: dts: qcom: sm8650-qrd: add gpio74 as reserved gpio
>       arm64: dts: qcom: sm8650-mtp: add gpio74 as reserved gpio
> 
>  arch/arm64/boot/dts/qcom/sm8650-mtp.dts | 2 +-
>  arch/arm64/boot/dts/qcom/sm8650-qrd.dts | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> ---
> base-commit: bffdfd2e7e63175ae261131a620f809d946cf9a7
> change-id: 20240111-topic-sm8650-upstream-qrd-fix-gpio-reserved-1c3d56c2d3e8
> 
> Best regards,