diff --git a/Documentation/devicetree/bindings/arm/zte.yaml b/Documentation/devicetree/bindings/arm/zte.yaml new file mode 100644 index 000000000000..f028d2cec7ab --- /dev/null +++ b/Documentation/devicetree/bindings/arm/zte.yaml @@ -0,0 +1,26 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/zte.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ZTE zx platforms + +maintainers: + - Stefan Dösinger + +description: | + ARM platforms using SoCs designed by ZTE. Currently this supports devices + based on the zx297520v3 SoC which is found in LTE routers. + +properties: + $nodename: + const: "/" + compatible: + oneOf: + - items: + - enum: + - dlink,dwr932m + - const: zte,zx297520v3 + +additionalProperties: true diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index efe38eb25301..28fba538d552 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -39,3 +39,4 @@ subdir-y += unisoc subdir-y += vt8500 subdir-y += xen subdir-y += xilinx +subdir-y += zte diff --git a/arch/arm/boot/dts/zte/Makefile b/arch/arm/boot/dts/zte/Makefile new file mode 100644 index 000000000000..f052cfbd636c --- /dev/null +++ b/arch/arm/boot/dts/zte/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only +dtb-$(CONFIG_SOC_ZX297520V3) += \ + zx297520v3-dlink-dwr932m.dtb diff --git a/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts b/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts new file mode 100644 index 000000000000..1700f46aba86 --- /dev/null +++ b/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2026 Stefan Dösinger + */ + +/dts-v1/; + +#include "zx297520v3.dtsi" + +/ { + model = "D-Link DWR-932M"; + compatible = "dlink,dwr932m", "zte,zx297520v3"; + + memory@20000000 { + device_type = "memory"; + reg = <0x20000000 0x04000000>; + }; +}; + +&uart1 { + status = "okay"; +}; diff --git a/arch/arm/boot/dts/zte/zx297520v3.dtsi b/arch/arm/boot/dts/zte/zx297520v3.dtsi new file mode 100644 index 000000000000..a16c30a164bb --- /dev/null +++ b/arch/arm/boot/dts/zte/zx297520v3.dtsi @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2026 Stefan Dösinger + */ + +#include + +/ { + #address-cells = <1>; + #size-cells = <1>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + compatible = "arm,cortex-a53"; + reg = <0>; + }; + }; + + /* Base bus clock and default for the UART. It will be replaced once a clock driver has + * been added. + */ + uartclk: uartclk-26000000 { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <26000000>; + }; + + timer { + compatible = "arm,armv7-timer"; + interrupts = , + , + , + ; + clock-frequency = <26000000>; + interrupt-parent = <&gic>; + /* I don't think uboot sets CNTVOFF and the stock kernel doesn't use the + * arm timer at all. Since this is a single CPU system I don't think it + * really matters that the offset is random though. + */ + arm,cpu-registers-not-fw-configured; + }; + + soc { + #address-cells = <1>; + #size-cells = <1>; + compatible = "simple-bus"; + interrupt-parent = <&gic>; + ranges; + + /* The GIC has a non-standard way of configuring ints between level-low/level + * high or rising edge/falling edge at 0xf2202070 and onwards. See AP_INT_MODE_BASE + * and AP_PPI_MODE_REG in the ZTE kernel, although the offsets in the kernel source + * seem wrong. + * + * Everything defaults to active-high/rising edge, but the timer is active-low. We + * currently rely on the boot loader to change timer IRQs to active-low for us for + * now. + */ + gic: interrupt-controller@f2000000 { + compatible = "arm,gic-v3"; + interrupt-controller; + #interrupt-cells = <3>; + #address-cells = <1>; + #size-cells = <1>; + reg = <0xf2000000 0x10000>, + <0xf2040000 0x20000>; + }; + + uart0: serial@131000 { + compatible = "arm,pl011", "arm,primecell"; + arm,primecell-periphid = <0x0018c011>; + reg = <0x00131000 0x1000>; + interrupts = ; + clocks = <&uartclk>, <&uartclk>; + clock-names = "uartclk", "apb_pclk"; + status = "disabled"; + }; + + uart1: serial@1408000 { + compatible = "arm,pl011", "arm,primecell"; + arm,primecell-periphid = <0x0018c011>; + reg = <0x01408000 0x1000>; + interrupts = ; + clocks = <&uartclk>, <&uartclk>; + clock-names = "uartclk", "apb_pclk"; + status = "disabled"; + }; + + uart2: serial@140d000 { + compatible = "arm,pl011", "arm,primecell"; + arm,primecell-periphid = <0x0018c011>; + reg = <0x0140d000 0x1000>; + interrupts = ; + clocks = <&uartclk>, <&uartclk>; + clock-names = "uartclk", "apb_pclk"; + status = "disabled"; + }; + }; +};