linux-kernel - Re: [PATCH V2 7/8] arm64: dts: Add ipq5018 SoC and MP03 board support

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Date:   Wed, 22 Jun 2022 17:18:52 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sricharan R <quic_srichara@...cinc.com>, agross@...nel.org,
        bjorn.andersson@...aro.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
        sboyd@...nel.org, linus.walleij@...aro.org,
        catalin.marinas@....com, p.zabel@...gutronix.de,
        quic_varada@...cinc.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V2 7/8] arm64: dts: Add ipq5018 SoC and MP03 board support

On 21/06/2022 18:11, Sricharan R wrote:
> From: Varadarajan Narayanan <quic_varada@...cinc.com>
> 
> Add initial device tree support for the Qualcomm IPQ5018 SoC and
> MP03.1-C2 board.
> 
> Co-developed-by: Sricharan R <quic_srichara@...cinc.com>
> Signed-off-by: Sricharan R <quic_srichara@...cinc.com>
> Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>

Chain needs fixes.

> ---
>  arch/arm64/boot/dts/qcom/Makefile             |   1 +
>  .../arm64/boot/dts/qcom/ipq5018-mp03.1-c2.dts |  29 +++
>  arch/arm64/boot/dts/qcom/ipq5018.dtsi         | 221 ++++++++++++++++++
>  3 files changed, 251 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/ipq5018-mp03.1-c2.dts
>  create mode 100644 arch/arm64/boot/dts/qcom/ipq5018.dtsi
> 
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index f9e6343acd03..c44e701f093c 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -10,6 +10,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk10-c2.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-alcatel-idol347.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-asus-z00l.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-huawei-g7.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= ipq5018-mp03.1-c2.dtb

This does not look like in proper order.

>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-longcheer-l8150.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-longcheer-l8910.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-mtp.dtb
> diff --git a/arch/arm64/boot/dts/qcom/ipq5018-mp03.1-c2.dts b/arch/arm64/boot/dts/qcom/ipq5018-mp03.1-c2.dts
> new file mode 100644
> index 000000000000..d1cd080ec3db
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq5018-mp03.1-c2.dts
> @@ -0,0 +1,29 @@
> +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
> +/*
> + * IPQ5018 CP01 board device tree source
> + *
> + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "ipq5018.dtsi"
> +
> +/ {
> +	model = "Qualcomm Technologies, Inc. IPQ5018/AP-MP03-C2";
> +	compatible = "qcom,ipq5018-mp03", "qcom,ipq5018";
> +
> +	aliases {
> +		serial0 = &blsp1_uart1;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +};
> +
> +&blsp1_uart1 {
> +	pinctrl-0 = <&serial_1_pins>;
> +	pinctrl-names = "default";
> +	status = "ok";

"okay" is preferred.

> +};
> diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> new file mode 100644
> index 000000000000..084fb7b30dfd
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> @@ -0,0 +1,221 @@
> +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
> +/*
> + * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
> + */
> +/*
> + * IPQ5018 SoC device tree source
> + *
> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.

Combine these two comments.

> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/qcom,gcc-ipq5018.h>
> +#include <dt-bindings/reset/qcom,gcc-ipq5018.h>
> +
> +/ {
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +	interrupt-parent = <&intc>;
> +
> +	sleep_clk: sleep-clk {
> +		compatible = "fixed-clock";
> +		clock-frequency = <32000>;
> +		#clock-cells = <0>;
> +	};
> +
> +	xo: xo {

Node name: xo-clk

> +		compatible = "fixed-clock";
> +		clock-frequency = <24000000>;

The clock is provided by board, so at least frequency should be defined
there.

> +		#clock-cells = <0>;
> +	};
> +
> +	gen2clk0: gen2clk0 {

Keep consistent prefixes, so gen2-clk or gen2-0-clk

> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <125000000>;
> +		clock-output-names = "pcie20_phy0_pipe_clk";
> +	};
> +
> +	gen2clk1: gen2clk1 {

gen2-1-clk

> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <125000000>;
> +		clock-output-names = "pcie20_phy1_pipe_clk";
> +	};
> +


Best regards,
Krzysztof