Subject: Re: [PATCH V2 6/7] arm64: dts: Add ipq6018 SoC and CP01 board support

From: Bjorn Andersson <[email-masked]>
Date: Sat, 28 Dec 2019 19:29:44 -0800

On Thu 19 Dec 02:41 PST 2019, Sricharan R wrote:

> Add initial device tree support for the Qualcomm IPQ6018 SoC and
> CP01 evaluation board.
> 

Hi Sricharan, thanks for the rework, this looks pretty good now, just
some minor comments below.

> Signed-off-by: Abhishek Sahu <[email-masked]>
> Signed-off-by: Sivaprakash Murugesan <[email-masked]>
> Signed-off-by: Sricharan R <[email-masked]>

Should this have some Co-developed-by?

> ---
> 
>  [V2] Sorted nodes based on address, name, label.
>       Removed unused clock nodes.
>       Addressed other review comments.
> 
>  arch/arm64/boot/dts/qcom/Makefile            |   1 +
>  arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts |  41 +++++
>  arch/arm64/boot/dts/qcom/ipq6018.dtsi        | 215 +++++++++++++++++++++++++++
>  3 files changed, 257 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
>  create mode 100644 arch/arm64/boot/dts/qcom/ipq6018.dtsi
> 
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index 6498a1e..2b24998 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -1,6 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= apq8096-db820c.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= ipq6018-cp01-c1.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk01.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-mtp.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-longcheer-l8150.dtb
> diff --git a/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts b/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
> new file mode 100644
> index 0000000..82a6024
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
> @@ -0,0 +1,41 @@
> +// SPDX-License-Identifier: GPL-2.0

Please dual license as GPL+BSD

> +/*
> + * IPQ6018 CP01 board device tree source
> + *
> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "ipq6018.dtsi"
> +
> +/ {
> +	model = "Qualcomm Technologies, Inc. IPQ6018/AP-CP01-C1";
> +	compatible = "qcom,ipq6018-cp01", "qcom,ipq6018";
> +
> +	aliases {
> +		serial0 = &blsp1_uart3;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +		bootargs-append = " swiotlb=1";
> +	};
> +};
> +
> +&blsp1_uart3 {
> +	pinctrl-0 = <&uart_pins>;
> +	pinctrl-names = "default";
> +	status = "ok";
> +};
> +
> +&tlmm {
> +	uart_pins: uart_pins {

Reference the &uart_pins directly, and please use a more specific name.

> +		mux {

I would suggest that you either flatten the "mux" subnode and define the
properties directly in &uart_pins; or you split it the functional pieces
of rx { } tx { }.

And right now you're duplicating the properties between the dtsi and the
dts, either drop one of them or define the function in the dtsi and add
the drive-strenght and bias-pull-down here.

> +			pins = "gpio44", "gpio45";
> +			function = "blsp2_uart";
> +			drive-strength = <8>;
> +			bias-pull-down;
> +		};
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
> new file mode 100644
> index 0000000..269287c
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
> @@ -0,0 +1,215 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * IPQ6018 SoC device tree source
> + *
> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.
> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/qcom,gcc-ipq6018.h>
> +
> +/ {
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +	interrupt-parent = <&intc>;
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		tz: tz@48500000 {
> +			reg = <0x0 0x48500000 0x0 0x00200000>;
> +			no-map;
> +		};
> +	};
> +
> +	soc: soc {

soc@0

Shouldn't this be sorted after 'p'?

Regards,
Bjorn

> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0 0 0 0xffffffff>;
> +		dma-ranges;
> +		compatible = "simple-bus";
> +
> +		tlmm: pinctrl@1000000 {
> +			compatible = "qcom,ipq6018-pinctrl";
> +			reg = <0x01000000 0x300000>;
> +			interrupts = <GIC_SPI 0xd0 IRQ_TYPE_LEVEL_HIGH>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			gpio-ranges = <&tlmm 0 80>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +
> +			uart_pins: uart_pins {
> +				pins = "gpio44", "gpio45";
> +				function = "blsp2_uart";
> +				drive-strength = <8>;
> +				bias-pull-down;
> +			};
> +		};
> +
> +		gcc: gcc@1800000 {
> +			compatible = "qcom,gcc-ipq6018";
> +			reg = <0x01800000 0x80000>;
> +			#clock-cells = <1>;
> +			#reset-cells = <1>;
> +		};
> +
> +		blsp1_uart3: serial@78b1000 {
> +			compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
> +			reg = <0x078b1000 0x200>;
> +			interrupts = <GIC_SPI 306 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&gcc GCC_BLSP1_UART3_APPS_CLK>,
> +				<&gcc GCC_BLSP1_AHB_CLK>;
> +			clock-names = "core", "iface";
> +			status = "disabled";
> +		};
> +
> +		intc: interrupt-controller@b000000 {
> +			compatible = "qcom,msm-qgic2";
> +			interrupt-controller;
> +			#interrupt-cells = <0x3>;
> +			reg =   <0x0b000000 0x1000>,  /*GICD*/
> +				<0x0b002000 0x1000>,  /*GICC*/
> +				<0x0b001000 0x1000>,  /*GICH*/
> +				<0x0b004000 0x1000>;  /*GICV*/
> +			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +		};
> +
> +		timer {
> +			compatible = "arm,armv8-timer";
> +			interrupts = <GIC_PPI 2 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +				     <GIC_PPI 3 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +				     <GIC_PPI 4 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +				     <GIC_PPI 1 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> +		};
> +
> +		timer@b120000 {
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges;
> +			compatible = "arm,armv7-timer-mem";
> +			reg = <0x0b120000 0x1000>;
> +			clock-frequency = <19200000>;
> +
> +			frame@b120000 {
> +				frame-number = <0>;
> +				interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
> +					     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0x0b121000 0x1000>,
> +				      <0x0b122000 0x1000>;
> +			};
> +
> +			frame@b123000 {
> +				frame-number = <1>;
> +				interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0xb123000 0x1000>;
> +				status = "disabled";
> +			};
> +
> +			frame@b124000 {
> +				frame-number = <2>;
> +				interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0x0b124000 0x1000>;
> +				status = "disabled";
> +			};
> +
> +			frame@b125000 {
> +				frame-number = <3>;
> +				interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0x0b125000 0x1000>;
> +				status = "disabled";
> +			};
> +
> +			frame@b126000 {
> +				frame-number = <4>;
> +				interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0x0b126000 0x1000>;
> +				status = "disabled";
> +			};
> +
> +			frame@b127000 {
> +				frame-number = <5>;
> +				interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0x0b127000 0x1000>;
> +				status = "disabled";
> +			};
> +
> +			frame@b128000 {
> +				frame-number = <6>;
> +				interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
> +				reg = <0x0b128000 0x1000>;
> +				status = "disabled";
> +			};
> +		};
> +
> +	};
> +
> +	clocks {
> +		sleep_clk: sleep-clk {
> +			compatible = "fixed-clock";
> +			clock-frequency = <32000>;
> +			#clock-cells = <0>;
> +		};
> +
> +		xo: xo {
> +			compatible = "fixed-clock";
> +			clock-frequency = <24000000>;
> +			#clock-cells = <0>;
> +		};
> +	};
> +
> +	cpus: cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		CPU0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x0>;
> +			enable-method = "psci";
> +			next-level-cache = <&L2_0>;
> +		};
> +
> +		CPU1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			enable-method = "psci";
> +			reg = <0x1>;
> +			next-level-cache = <&L2_0>;
> +		};
> +
> +		CPU2: cpu@2 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			enable-method = "psci";
> +			reg = <0x2>;
> +			next-level-cache = <&L2_0>;
> +		};
> +
> +		CPU3: cpu@3 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			enable-method = "psci";
> +			reg = <0x3>;
> +			next-level-cache = <&L2_0>;
> +		};
> +
> +		L2_0: l2-cache {
> +			compatible = "cache";
> +			cache-level = <0x2>;
> +		};
> +	};
> +
> +	pmuv8: pmu {
> +		compatible = "arm,cortex-a53-pmu";
> +		interrupts = <GIC_PPI 7 (GIC_CPU_MASK_SIMPLE(4) |
> +					 IRQ_TYPE_LEVEL_HIGH)>;
> +	};
> +
> +	psci: psci {
> +		compatible = "arm,psci-1.0";
> +		method = "smc";
> +	};
> +};
> -- 
> 1.9.1

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