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Message-ID: <0709a0a6-1313-452c-85e7-2926a6a03741@kernel.org>
Date: Tue, 24 Jun 2025 08:45:04 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Harshit Shah <hshah@...ado.com>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
<conor+dt@...nel.org>, Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>, Arnd Bergmann <arnd@...db.de>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
Jan Kotas <jank@...ence.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
soc@...ts.linux.dev
Subject: Re: [PATCH v3 5/7] arm64: dts: axiado: Add initial support for AX3000
SoC and eval board
On 23/06/2025 19:28, Harshit Shah wrote:
> Add initial device tree support for the AX3000 SoC and its evaluation
> platform. The AX3000 is a multi-core SoC featuring 4 Cortex-A53 cores,
> Secure Vault, AI Engine and Firewall.
>
> This commit adds support for Cortex-A53 CPUs, timer, UARTs, and I3C
> controllers on the AX3000 evaluation board.
>
> Signed-off-by: Harshit Shah <hshah@...ado.com>
> ---
> arch/arm64/boot/dts/Makefile | 1 +
> arch/arm64/boot/dts/axiado/Makefile | 2 +
> arch/arm64/boot/dts/axiado/ax3000-evk.dts | 79 +++++
> arch/arm64/boot/dts/axiado/ax3000.dtsi | 488 ++++++++++++++++++++++++++++++
> 4 files changed, 570 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
> index 79b73a21ddc22b17308554e502f8207392935b45..47dd8a1a7960d179ee28969a1d6750bfa0d73da1 100644
> --- a/arch/arm64/boot/dts/Makefile
> +++ b/arch/arm64/boot/dts/Makefile
> @@ -9,6 +9,7 @@ subdir-y += amlogic
> subdir-y += apm
> subdir-y += apple
> subdir-y += arm
> +subdir-y += axiado
> subdir-y += bitmain
> subdir-y += blaize
> subdir-y += broadcom
> diff --git a/arch/arm64/boot/dts/axiado/Makefile b/arch/arm64/boot/dts/axiado/Makefile
> new file mode 100644
> index 0000000000000000000000000000000000000000..6676ad07db6129f8b333b0feffee705d272517c2
> --- /dev/null
> +++ b/arch/arm64/boot/dts/axiado/Makefile
> @@ -0,0 +1,2 @@
> +# SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_ARCH_AXIADO) += ax3000-evk.dtb
> diff --git a/arch/arm64/boot/dts/axiado/ax3000-evk.dts b/arch/arm64/boot/dts/axiado/ax3000-evk.dts
> new file mode 100644
> index 0000000000000000000000000000000000000000..cc3bcf681c32430d251f20f6d52905423c182f3b
> --- /dev/null
> +++ b/arch/arm64/boot/dts/axiado/ax3000-evk.dts
> @@ -0,0 +1,79 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (c) 2021-25 Axiado Corporation (or its affiliates). All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "ax3000.dtsi"
> +
> +/ {
> + model = "Axiado AX3000 EVK";
> + compatible = "axiado,ax3000-evk", "axiado,ax3000";
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + aliases {
> + serial3 = &uart3;
> + };
> +
> + chosen {
> + stdout-path = "serial3:115200";
> + };
> +
> + memory@0 {
> + device_type = "memory";
> + /* Cortex-A53 will use following memory map */
> + reg = <0x00000000 0x3D000000 0x00000000 0x23000000>,
Lowercase hex, see DTS coding style.
> + <0x00000004 0x00000000 0x00000000 0x80000000>;
> + };
> +};
> +
> +/* GPIO bank 0 - 7 */
> +&gpio0 {
> + status = "okay";
> +};
> +
> +&gpio1 {
> + status = "okay";
> +};
> +
> +&gpio2 {
> + status = "okay";
> +};
> +
> +&gpio3 {
> + status = "okay";
> +};
> +
> +&gpio4 {
> + status = "okay";
> +};
> +
> +&gpio5 {
> + status = "okay";
> +};
> +
> +&gpio6 {
> + status = "okay";
> +};
> +
> +&gpio7 {
> + status = "okay";
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> +
> +&uart1 {
> + status = "okay";
> +};
> +
> +&uart2 {
> + status = "okay";
> +};
> +
> +&uart3 {
> + status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/axiado/ax3000.dtsi b/arch/arm64/boot/dts/axiado/ax3000.dtsi
> new file mode 100644
> index 0000000000000000000000000000000000000000..ea85ae8ca5dea5ab3288a2770b18d7aeb66cad03
> --- /dev/null
> +++ b/arch/arm64/boot/dts/axiado/ax3000.dtsi
> @@ -0,0 +1,488 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (c) 2021-25 Axiado Corporation (or its affiliates). All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/memreserve/ 0x3c0013a0 0x00000008; /* cpu-release-addr */
> +/ {
> + model = "Axiado AX3000";
> + interrupt-parent = <&gic500>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + cpus {
> + #address-cells = <2>;
> + #size-cells = <0>;
> +
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x0>;
> + enable-method = "spin-table";
> + cpu-release-addr = <0x0 0x3c0013a0>;
> + d-cache-size = <0x8000>;
> + d-cache-line-size = <64>;
> + d-cache-sets = <128>;
> + i-cache-size = <0x8000>;
> + i-cache-line-size = <64>;
> + i-cache-sets = <256>;
> + next-level-cache = <&l2>;
> + };
Missing blank line between each new node. See DTS coding style.
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x1>;
> + enable-method = "spin-table";
> + cpu-release-addr = <0x0 0x3c0013a0>;
> + d-cache-size = <0x8000>;
> + d-cache-line-size = <64>;
> + d-cache-sets = <128>;
> + i-cache-size = <0x8000>;
> + i-cache-line-size = <64>;
> + i-cache-sets = <256>;
> + next-level-cache = <&l2>;
> + };
> + cpu2: cpu@2 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x2>;
> + enable-method = "spin-table";
> + cpu-release-addr = <0x0 0x3c0013a0>;
> + d-cache-size = <0x8000>;
> + d-cache-line-size = <64>;
> + d-cache-sets = <128>;
> + i-cache-size = <0x8000>;
> + i-cache-line-size = <64>;
> + i-cache-sets = <256>;
> + next-level-cache = <&l2>;
> + };
> + cpu3: cpu@3 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x3>;
> + enable-method = "spin-table";
> + cpu-release-addr = <0x0 0x3c0013a0>;
> + d-cache-size = <0x8000>;
> + d-cache-line-size = <64>;
> + d-cache-sets = <128>;
> + i-cache-size = <0x8000>;
> + i-cache-line-size = <64>;
> + i-cache-sets = <256>;
> + next-level-cache = <&l2>;
> + };
> + l2: l2-cache0 {
> + compatible = "cache";
> + cache-size = <0x100000>;
> + cache-unified;
> + cache-line-size = <64>;
> + cache-sets = <1024>;
> + cache-level = <2>;
> + };
> + };
> +
> + clocks {
> + clk_xin: clock-200000000 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <200000000>;
> + clock-output-names = "clk_xin";
> + };
> + refclk: clock-125000000 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <125000000>;
> + };
> + };
> +
> + soc {
> + compatible = "simple-bus";
> + ranges;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + interrupt-parent = <&gic500>;
> +
> + gic500: interrupt-controller@...00000 {
> + compatible = "arm,gic-v3";
> + reg = <0x00 0x80300000 0x00 0x10000>,
> + <0x00 0x80380000 0x00 0x80000>;
Does not look aligned.
> + ranges;
> + #interrupt-cells = <3>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + interrupt-controller;
> + #redistributor-regions = <1>;
> + interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> + };
> +
> + /* GPIO Controller banks 0 - 7 */
> + gpio0: gpio-controller@...00000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80500000 0x00 0x400>;
Only one space, not double space.
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 183 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
Please follow DTS coding style.
> + gpio1: gpio-controller@...80000 {
> + compatible = "cdns,gpio-r1p02";
This should not be accepted without specific compatible, but that's some
old binding so maybe matters less. Anyway, if you ever need quirk or
custom properties they I will reject them based on what you claim here.
> + reg = <0x00 0x80580000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> + gpio2: gpio-controller@...00000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80600000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> + gpio3: gpio-controller@...80000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80680000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> + gpio4: gpio-controller@...00000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80700000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> + gpio5: gpio-controller@...80000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80780000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> + gpio6: gpio-controller@...00000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80800000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> + gpio7: gpio-controller@...80000 {
> + compatible = "cdns,gpio-r1p02";
> + reg = <0x00 0x80880000 0x00 0x400>;
> + clocks = <&refclk>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + status = "disabled";
> + };
> +
> + /* I3C Controller 0 - 16 */
> + i3c0: i3c@...00400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80500400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c1: i3c@...00800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80500800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c2: i3c@...80400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80580400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c3: i3c@...80800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80580800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c4: i3c@...00400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80600400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c5: i3c@...00800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80600800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c6: i3c@...80400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80680400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c7: i3c@...80800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80680800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c8: i3c@...00400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80700400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c9: i3c@...00800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80700800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c10: i3c@...80400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80780400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c11: i3c@...80800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80780800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c12: i3c@...00400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80800400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c13: i3c@...00800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80800800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c14: i3c@...80400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80880400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c15: i3c@...80800 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80880800 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + i3c16: i3c@...20400 {
> + compatible = "cdns,i3c-master";
> + reg = <0x00 0x80620400 0x00 0x400>;
> + clocks = <&refclk &clk_xin>;
> + clock-names = "pclk", "sysclk";
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
> + i2c-scl-hz = <100000>;
> + i3c-scl-hz = <400000>;
> + #address-cells = <3>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> + uart0: serial@...20000 {
Looks like not ordered by unit address. What is the ordering rule you
are going to adopt for entire arch?
> + compatible = "xlnx,zynqmp-uart", "cdns,uart-r1p12";
NAK, you do not have xlnx here. Look at your SoC: name of vendor is
axiado. Not xlnx. How is your SoC called? Also zynqmp? You cannot just
randomly pick any compatibles and stuff them around.
Please carefully read writing bindings from DT directory.
> + reg = <0x00 0x80520000 0x00 0x100>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
> + clock-names = "uart_clk", "pclk";
> + clocks = <&refclk &refclk>;
> + status = "disabled";
> + };
Best regards,
Krzysztof
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