Re: [PATCH v3 11/11] arm64: dts: Add Pensando Elba SoC support

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On Sun, Oct 24, 2021 at 06:51:56PM -0700, Brad Larson wrote:
> Add Pensando common and Elba SoC specific device nodes
> 
> Signed-off-by: Brad Larson <brad@xxxxxxxxxxx>
> ---
> Changelog:
> - Node names changed to DT generic names
> - Changed from using 'spi@' which is reserved
> - The elba-flash-parts.dtsi is kept separate as
>   it is included in multiple dts files.
> - SPDX license tags at the top of each file
> - The compatible = "pensando,elba" and 'model' are
>   now together in the board file.
> - UIO nodes removed
> - Ordered nodes by increasing unit address
> - Removed an unreferenced container node.
> - Dropped deprecated 'device_type' for uart0 node.
> 
>  arch/arm64/boot/dts/Makefile                  |   1 +
>  arch/arm64/boot/dts/pensando/Makefile         |   6 +
>  arch/arm64/boot/dts/pensando/elba-16core.dtsi | 192 ++++++++++++++++++
>  .../boot/dts/pensando/elba-asic-common.dtsi   |  96 +++++++++
>  arch/arm64/boot/dts/pensando/elba-asic.dts    |  23 +++
>  .../boot/dts/pensando/elba-flash-parts.dtsi   | 103 ++++++++++
>  arch/arm64/boot/dts/pensando/elba.dtsi        | 181 +++++++++++++++++
>  7 files changed, 602 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/pensando/Makefile
>  create mode 100644 arch/arm64/boot/dts/pensando/elba-16core.dtsi
>  create mode 100644 arch/arm64/boot/dts/pensando/elba-asic-common.dtsi
>  create mode 100644 arch/arm64/boot/dts/pensando/elba-asic.dts
>  create mode 100644 arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi
>  create mode 100644 arch/arm64/boot/dts/pensando/elba.dtsi
> 
> diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
> index 639e01a4d855..34f99a99c488 100644
> --- a/arch/arm64/boot/dts/Makefile
> +++ b/arch/arm64/boot/dts/Makefile
> @@ -20,6 +20,7 @@ subdir-y += marvell
>  subdir-y += mediatek
>  subdir-y += microchip
>  subdir-y += nvidia
> +subdir-y += pensando
>  subdir-y += qcom
>  subdir-y += realtek
>  subdir-y += renesas
> diff --git a/arch/arm64/boot/dts/pensando/Makefile b/arch/arm64/boot/dts/pensando/Makefile
> new file mode 100644
> index 000000000000..61031ec11838
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_ARCH_PENSANDO) += elba-asic.dtb
> +

> +always-y	:= $(dtb-y)
> +subdir-y	:= $(dts-dirs)
> +clean-files	:= *.dtb

None of these lines should be needed.

> diff --git a/arch/arm64/boot/dts/pensando/elba-16core.dtsi b/arch/arm64/boot/dts/pensando/elba-16core.dtsi
> new file mode 100644
> index 000000000000..acf5941afbc1
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-16core.dtsi
> @@ -0,0 +1,192 @@
> +// SPDX-License-Identifier: GPL-2.0

Do you care about using with non-GPL OS? Dual license is preferred.

> +
> +/ {
> +	cpus {
> +		#address-cells = <2>;
> +		#size-cells = <0>;
> +
> +		cpu-map {
> +			cluster0 {
> +				core0 { cpu = <&cpu0>; };
> +				core1 { cpu = <&cpu1>; };
> +				core2 { cpu = <&cpu2>; };
> +				core3 { cpu = <&cpu3>; };
> +			};
> +
> +			cluster1 {
> +				core0 { cpu = <&cpu4>; };
> +				core1 { cpu = <&cpu5>; };
> +				core2 { cpu = <&cpu6>; };
> +				core3 { cpu = <&cpu7>; };
> +			};
> +
> +			cluster2 {
> +				core0 { cpu = <&cpu8>; };
> +				core1 { cpu = <&cpu9>; };
> +				core2 { cpu = <&cpu10>; };
> +				core3 { cpu = <&cpu11>; };
> +			};
> +
> +			cluster3 {
> +				core0 { cpu = <&cpu12>; };
> +				core1 { cpu = <&cpu13>; };
> +				core2 { cpu = <&cpu14>; };
> +				core3 { cpu = <&cpu15>; };
> +			};
> +		};
> +
> +		/* CLUSTER 0 */
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x0>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x1>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu2: cpu@2 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x2>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu3: cpu@3 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x3>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_0: l2-cache0 {
> +			compatible = "cache";
> +		};
> +
> +		/* CLUSTER 1 */
> +		cpu4: cpu@100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x100>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu5: cpu@101 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x101>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu6: cpu@102 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x102>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu7: cpu@103 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x103>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_1: l2-cache1 {
> +			compatible = "cache";
> +		};
> +
> +		/* CLUSTER 2 */
> +		cpu8: cpu@200 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x200>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu9: cpu@201 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x201>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu10: cpu@202 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x202>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu11: cpu@203 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x203>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_2: l2-cache2 {
> +			compatible = "cache";
> +		};
> +
> +		/* CLUSTER 3 */
> +		cpu12: cpu@300 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x300>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu13: cpu@301 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x301>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu14: cpu@302 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x302>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu15: cpu@303 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x303>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_3: l2-cache3 {
> +			compatible = "cache";
> +		};
> +
> +		psci {

This goes at the root level.

> +			compatible = "arm,psci-0.2";
> +			method = "smc";
> +		};
> +
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/pensando/elba-asic-common.dtsi b/arch/arm64/boot/dts/pensando/elba-asic-common.dtsi
> new file mode 100644
> index 000000000000..ba584c0fe0d5
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-asic-common.dtsi
> @@ -0,0 +1,96 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (c) 2019-2021, Pensando Systems Inc. */
> +
> +&ahb_clk {
> +	clock-frequency = <400000000>;
> +};
> +
> +&emmc_clk {
> +	clock-frequency = <200000000>;
> +};
> +
> +&flash_clk {
> +	clock-frequency = <400000000>;
> +};
> +
> +&ref_clk {
> +	clock-frequency = <156250000>;
> +};
> +
> +&qspi {
> +	status = "okay";
> +	flash0: flash@0 {
> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +		spi-max-frequency = <40000000>;
> +		spi-rx-bus-width = <2>;
> +		m25p,fast-read;
> +		cdns,read-delay = <0>;
> +		cdns,tshsl-ns = <0>;
> +		cdns,tsd2d-ns = <0>;
> +		cdns,tchsh-ns = <0>;
> +		cdns,tslch-ns = <0>;
> +	};
> +};
> +
> +&gpio0 {
> +	status = "okay";
> +};
> +
> +&emmc {
> +	bus-width = <8>;
> +	status = "okay";
> +};
> +
> +&wdt0 {
> +	status = "okay";
> +};
> +
> +&i2c0 {
> +	clock-frequency = <100000>;
> +	status = "okay";
> +	rtc@51 {
> +		compatible = "nxp,pcf85263";
> +		reg = <0x51>;
> +	};
> +};
> +
> +&spi0 {
> +	num-cs = <4>;
> +	cs-gpios = <0>, <0>, <&porta 1 GPIO_ACTIVE_LOW>,
> +		   <&porta 7 GPIO_ACTIVE_LOW>;
> +	status = "okay";
> +	spi0_cs0@0 {

Node names should reflect the class of device and use standard name 
defined in the DT spec. This probably doesn't have one. 'lora' perhaps?


> +		compatible = "semtech,sx1301";	/* Enable spidev */

What's spidev?

> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		spi-max-frequency = <12000000>;
> +		reg = <0>;
> +	};
> +
> +	spi0_cs1@1 {
> +		compatible = "semtech,sx1301";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		spi-max-frequency = <12000000>;
> +		reg = <1>;
> +	};
> +
> +	spi0_cs2@2 {
> +		compatible = "semtech,sx1301";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		spi-max-frequency = <12000000>;
> +		reg = <2>;
> +		interrupt-parent = <&porta>;
> +		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +	};
> +
> +	spi0_cs3@3 {
> +		compatible = "semtech,sx1301";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		spi-max-frequency = <12000000>;
> +		reg = <3>;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/pensando/elba-asic.dts b/arch/arm64/boot/dts/pensando/elba-asic.dts
> new file mode 100644
> index 000000000000..131931dc643f
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-asic.dts
> @@ -0,0 +1,23 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/dts-v1/;
> +
> +/ {
> +	model = "Elba ASIC Board";
> +	compatible = "pensando,elba";

Normally we have a compatible for the board plus the soc compatible.

> +
> +	aliases {
> +		serial0 = &uart0;
> +		spi0 = &spi0;
> +		spi1 = &qspi;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +};
> +
> +#include "elba.dtsi"
> +#include "elba-16core.dtsi"
> +#include "elba-asic-common.dtsi"
> +#include "elba-flash-parts.dtsi"
> diff --git a/arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi b/arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi
> new file mode 100644
> index 000000000000..e69734c2c267
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi
> @@ -0,0 +1,103 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +&flash0 {
> +	partitions {
> +		compatible = "fixed-partitions";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		partition@0 {
> +			label = "flash";
> +			reg = <0x10000 0xfff0000>;
> +		};
> +
> +		partition@f0000 {
> +			label = "golduenv";
> +			reg = <0xf0000 0x10000>;
> +		};
> +
> +		partition@100000 {
> +			label = "boot0";
> +			reg = <0x100000 0x80000>;
> +		};
> +
> +		partition@180000 {
> +			label = "golduboot";
> +			reg = <0x180000 0x200000>;
> +		};
> +
> +		partition@380000 {
> +			label = "brdcfg0";
> +			reg = <0x380000 0x10000>;
> +		};
> +
> +		partition@390000 {
> +			label = "brdcfg1";
> +			reg = <0x390000 0x10000>;
> +		};
> +
> +		partition@400000 {
> +			label = "goldfw";
> +			reg = <0x400000 0x3c00000>;
> +		};
> +
> +		partition@4010000 {
> +			label = "fwmap";
> +			reg = <0x4010000 0x20000>;
> +		};
> +
> +		partition@4030000 {
> +			label = "fwsel";
> +			reg = <0x4030000 0x20000>;
> +		};
> +
> +		partition@4090000 {
> +			label = "bootlog";
> +			reg = <0x4090000 0x20000>;
> +		};
> +
> +		partition@40b0000 {
> +			label = "panicbuf";
> +			reg = <0x40b0000 0x20000>;
> +		};
> +
> +		partition@40d0000 {
> +			label = "uservars";
> +			reg = <0x40d0000 0x20000>;
> +		};
> +
> +		partition@4200000 {
> +			label = "uboota";
> +			reg = <0x4200000 0x400000>;
> +		};
> +
> +		partition@4600000 {
> +			label = "ubootb";
> +			reg = <0x4600000 0x400000>;
> +		};
> +
> +		partition@4a00000 {
> +			label = "mainfwa";
> +			reg = <0x4a00000 0x1000000>;
> +		};
> +
> +		partition@5a00000 {
> +			label = "mainfwb";
> +			reg = <0x5a00000 0x1000000>;
> +		};
> +
> +		partition@6a00000 {
> +			label = "diaguboot";
> +			reg = <0x6a00000 0x400000>;
> +		};
> +
> +		partition@8000000 {
> +			label = "diagfw";
> +			reg = <0x8000000 0x7fe0000>;
> +		};
> +
> +		partition@ffe0000 {
> +			label = "ubootenv";
> +			reg = <0xffe0000 0x10000>;
> +		};
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/pensando/elba.dtsi b/arch/arm64/boot/dts/pensando/elba.dtsi
> new file mode 100644
> index 000000000000..b28f69e0bd91
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba.dtsi
> @@ -0,0 +1,181 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (c) 2019-2021, Pensando Systems Inc. */
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include "dt-bindings/interrupt-controller/arm-gic.h"
> +
> +/ {
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	dma-coherent;
> +
> +	ahb_clk: oscillator0 {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +	};
> +
> +	emmc_clk: oscillator2 {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +	};
> +
> +	flash_clk: oscillator3 {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +	};
> +
> +	ref_clk: oscillator4 {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(1) |
> +					IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(1) |
> +					IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(1) |
> +					IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(1) |
> +					IRQ_TYPE_LEVEL_LOW)>;
> +	};
> +
> +	pmu {
> +		compatible = "arm,cortex-a72-pmu";
> +		interrupts = <GIC_PPI 7 (GIC_CPU_MASK_SIMPLE(1) |
> +				IRQ_TYPE_LEVEL_LOW)>;
> +	};
> +
> +	soc: soc {
> +		compatible = "simple-bus";
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		i2c0: i2c@400 {
> +			compatible = "snps,designware-i2c";
> +			reg = <0x0 0x400 0x0 0x100>;
> +			clocks = <&ahb_clk>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			i2c-sda-hold-time-ns = <480>;
> +			snps,sda-timeout-ms = <750>;
> +			interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> +			status = "disabled";
> +		};
> +
> +		wdt0: watchdog@1400 {
> +			compatible = "snps,dw-wdt";
> +			reg = <0x0 0x1400 0x0 0x100>;
> +			clocks = <&ahb_clk>;
> +			interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
> +			status = "disabled";
> +		};
> +
> +		qspi: spi@2400 {
> +			compatible = "pensando,elba-qspi", "cdns,qspi-nor";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			reg = <0x0 0x2400 0x0 0x400>,
> +			      <0x0 0x7fff0000 0x0 0x1000>;
> +			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&flash_clk>;
> +			cdns,fifo-depth = <1024>;
> +			cdns,fifo-width = <4>;
> +			cdns,trigger-address = <0x7fff0000>;
> +			status = "disabled";
> +		};
> +
> +		spi0: spi@2800 {
> +			compatible = "pensando,elba-spi";
> +			reg = <0x0 0x2800 0x0 0x100>;
> +			pensando,spics = <&mssoc 0x2468>;
> +			clocks = <&ahb_clk>;
> +			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			num-cs = <2>;
> +			status = "disabled";
> +		};
> +
> +		gpio0: gpio@4000 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			compatible = "snps,dw-apb-gpio";
> +			reg = <0x0 0x4000 0x0 0x78>;
> +			status = "disabled";
> +
> +			porta: gpio-port@0 {
> +				compatible = "snps,dw-apb-gpio-port";
> +				reg = <0>;
> +				gpio-controller;
> +				#gpio-cells = <2>;
> +				ngpios = <8>;
> +				interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
> +				interrupt-controller;
> +				interrupt-parent = <&gic>;
> +				#interrupt-cells = <2>;
> +			};
> +
> +			portb: gpio-port@1 {
> +				compatible = "snps,dw-apb-gpio-port";
> +				reg = <1>;
> +				gpio-controller;
> +				#gpio-cells = <2>;
> +				ngpios = <8>;
> +			};
> +		};
> +
> +		uart0: serial@4800 {
> +			compatible = "ns16550a";
> +			reg = <0x0 0x4800 0x0 0x100>;
> +			clocks = <&ref_clk>;
> +			interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
> +			reg-shift = <2>;
> +			reg-io-width = <4>;
> +		};
> +
> +		gic: interrupt-controller@800000 {
> +			compatible = "arm,gic-v3";
> +			#interrupt-cells = <3>;
> +			#address-cells = <2>;
> +			#size-cells = <2>;
> +			ranges;
> +			interrupt-controller;
> +			reg = <0x0 0x800000 0x0 0x200000>,	/* GICD */
> +			      <0x0 0xa00000 0x0 0x200000>;	/* GICR */
> +			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			gic_its: msi-controller@820000 {
> +				compatible = "arm,gic-v3-its";
> +				msi-controller;
> +				#msi-cells = <1>;
> +				reg = <0x0 0x820000 0x0 0x10000>;
> +				socionext,synquacer-pre-its =
> +							<0xc00000 0x1000000>;
> +			};
> +		};
> +
> +		emmc: mmc@30440000 {
> +			compatible = "pensando,elba-emmc", "cdns,sd4hc";
> +			clocks = <&emmc_clk>;
> +			interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> +			reg = <0x0 0x30440000 0x0 0x10000>,
> +			      <0x0 0x30480044 0x0 0x4>;    /* byte-lane ctrl */
> +			cdns,phy-input-delay-sd-highspeed = <0x4>;
> +			cdns,phy-input-delay-legacy = <0x4>;
> +			cdns,phy-input-delay-sd-uhs-sdr50 = <0x6>;
> +			cdns,phy-input-delay-sd-uhs-ddr50 = <0x16>;
> +			mmc-ddr-1_8v;
> +			status = "disabled";
> +		};
> +
> +		mssoc: mssoc@307c0000 {
> +			compatible = "syscon", "simple-mfd";
> +			reg = <0x0 0x307c0000 0x0 0x3000>;
> +		};
> +	};
> +};
> -- 
> 2.17.1
> 
> 



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