Re: [PATCH 5/6] arm64: dts: Add ipq6018 SoC and CP01 board support

Marc Zyngier
2019-06-05T17:26:21Z

On 05/06/2019 18:16, Sricharan R wrote:
> Add initial device tree support for the Qualcomm IPQ6018 SoC and
> CP01 evaluation board.
>
> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
> Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
> ---
> arch/arm64/boot/dts/qcom/Makefile | 1 +
> arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts | 35 ++++
> arch/arm64/boot/dts/qcom/ipq6018.dtsi | 231 +++++++++++++++++++++++++++
> 3 files changed, 267 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 21d548f..ac22dbb 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -2,6 +2,7 @@
> dtb-$(CONFIG_ARCH_QCOM) += apq8016-sbc.dtb
> dtb-$(CONFIG_ARCH_QCOM) += apq8096-db820c.dtb
> dtb-$(CONFIG_ARCH_QCOM) += ipq8074-hk01.dtb
> +dtb-$(CONFIG_ARCH_QCOM) += ipq6018-cp01-c1.dtb
> dtb-$(CONFIG_ARCH_QCOM) += msm8916-mtp.dtb
> dtb-$(CONFIG_ARCH_QCOM) += msm8992-bullhead-rev-101.dtb
> dtb-$(CONFIG_ARCH_QCOM) += msm8994-angler-rev-101.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..ac7cb22
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * IPQ6018 CP01 board device tree source
> + *
> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "ipq6018.dtsi"
> +
> +/ {
> + #address-cells = <0x2>;
> + #size-cells = <0x2>;
> + model = "Qualcomm Technologies, Inc. IPQ6018/AP-CP01-C1";
> + compatible = "qcom,ipq6018-cp01", "qcom,ipq6018";
> + interrupt-parent = <&intc>;
> +};
> +
> +&tlmm {
> + uart_pins: uart_pins {
> + mux {
> + pins = "gpio44", "gpio45";
> + function = "blsp2_uart";
> + drive-strength = <8>;
> + bias-pull-down;
> + };
> + };
> +};
> +
> +&blsp1_uart3 {
> + pinctrl-0 = <&uart_pins>;
> + pinctrl-names = "default";
> + status = "ok";
> +};
> diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
> new file mode 100644
> index 0000000..79cccdd
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
> @@ -0,0 +1,231 @@
> +// 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>
> +
> +/ {
> + model = "Qualcomm Technologies, Inc. IPQ6018";
> + compatible = "qcom,ipq6018";
> +
> + chosen {
> + bootargs = "console=ttyMSM0,115200,n8 rw init=/init";
> + bootargs-append = " swiotlb=1 clk_ignore_unused";
> + };
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + tz:tz@48500000 {
> + no-map;
> + reg = <0x0 0x48500000 0x0 0x00200000>;
> + };
> + };
> +
> + soc: soc {
> + #address-cells = <0x1>;
> + #size-cells = <0x1>;
> + ranges = <0 0 0 0xffffffff>;
> + dma-ranges;
> + compatible = "simple-bus";
> +
> + intc: interrupt-controller@b000000 {
> + compatible = "qcom,msm-qgic2";
> + interrupt-controller;
> + #interrupt-cells = <0x3>;
> + reg = <0xb000000 0x1000>, <0xb002000 0x1000>;

Where are the rest of the GICv2 MMIO regions, such as GICV and GICH? And
the maintenance interrupt?

> + };
> +
> + 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)>;

The fact that you expose the EL2 timer interrupt would tend to confirm
the idea that this system supports virtualization... Hence my questions
above.

Thanks,

M.

--
Jazz is not dead. It just smells funny...