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

From: Bjorn Andersson
Date: Sat Dec 28 2019 - 22:34:29 EST

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 <absahu@xxxxxxxxxxxxxx>
> Signed-off-by: Sivaprakash Murugesan <sivaprak@xxxxxxxxxxxxxx>
> Signed-off-by: Sricharan R <sricharan@xxxxxxxxxxxxxx>

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