linux-kernel - Re: [RFC PATCH 2/2] arm64: dts: qcom: qcm6490: Add qcm6490 idp and rb3 board

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Message-ID: <CAA8EJpr_PwD0kD0RdgcwLCGaCdau+3EUPAQd32hxccNbtoKaKg@mail.gmail.com>
Date:   Fri, 17 Nov 2023 11:33:18 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Komal Bajaj <quic_kbajaj@...cinc.com>
Cc:     Andy Gross <agross@...nel.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>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_nainmeht@...cinc.com
Subject: Re: [RFC PATCH 2/2] arm64: dts: qcom: qcm6490: Add qcm6490 idp and
 rb3 board

On Fri, 17 Nov 2023 at 08:53, Komal Bajaj <quic_kbajaj@...cinc.com> wrote:

No HTML mail on kernel mailing lists, please. Some developers can have
'MIME => junk' mail filters.
And replying to the HTML mail messes up quotation level.

> On 11/4/2023 3:52 AM, Dmitry Baryshkov wrote:
>
> On Fri, 3 Nov 2023 at 20:49, Komal Bajaj <quic_kbajaj@...cinc.com> wrote:
>
> Add qcm6490 devicetree file for QCM6490 IDP and QCM6490 RB3
> platform. QCM6490 is derived from SC7280 meant for various
> form factor including IoT.
>
> Supported features are, as of now:
> * Debug UART
> * eMMC (only in IDP)
> * USB
>
> Co-developed-by: Naina Mehta <quic_nainmeht@...cinc.com>
> Signed-off-by: Naina Mehta <quic_nainmeht@...cinc.com>
> Signed-off-by: Komal Bajaj <quic_kbajaj@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/Makefile             |   2 +
>  arch/arm64/boot/dts/qcom/qcm6490-idp.dts      |  33 ++
>  .../boot/dts/qcom/qcm6490-iot-common.dtsi     | 291 ++++++++++++++++++
>  arch/arm64/boot/dts/qcom/qcm6490-rb3.dts      |  26 ++
>  4 files changed, 352 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/qcm6490-idp.dts
>  create mode 100644 arch/arm64/boot/dts/qcom/qcm6490-iot-common.dtsi
>  create mode 100644 arch/arm64/boot/dts/qcom/qcm6490-rb3.dts
>
>
> [...]
>
>
> diff --git a/arch/arm64/boot/dts/qcom/qcm6490-rb3.dts b/arch/arm64/boot/dts/qcom/qcm6490-rb3.dts
> new file mode 100644
> index 000000000000..5b4c2826ac5c
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/qcm6490-rb3.dts
> @@ -0,0 +1,26 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +/* PM7250B is configured to use SID8/9 */
> +#define PM7250B_SID 8
> +#define PM7250B_SID1 9
> +
> +#include "qcm6490-iot-common.dtsi"
> +#include "pm7250b.dtsi"
> +
> +/ {
> +       model = "Qualcomm Technologies, Inc. QCM6490 RB3";
>
> Is this a marketing name of the platform?
>
>
> Sorry for the confusion, QCS6490 RB3gen2 is the correct marketing name for this board.
> Will correct this in the next patchset.

Then it is probably "Qualcomm Technologies, Inc. Robotics RB3gen2"?

> +       compatible = "qcom,qcm6490-rb3", "qcom,qcm6490";
>
> chassis-type = ?
>
>
> No, this won't be needed as it is an evaluation board and will be used for multiple use cases.
> So, we don't want to mark it to any specific type.

Then it is "embedded". We should probably update existing
dragonboards/RB boards to have this type too.

-- 
With best wishes
Dmitry