[PATCH RFC 13/18] riscv: dts: zhihe: add A210 core support

From: Han Gao via B4 Relay

Date: Tue Oct 27 2026 - 11:43:06 EST

From: Zhiguo Zhu <zhiguo.zhu@xxxxxxxxxxxxxxxxx>

Describe the CPU clusters, interrupt controllers and pad controllers.
Use SCMI clock and reset services through the E902 mailbox, with a
second mailbox channel for firmware notifications.

Signed-off-by: Zhiguo Zhu <zhiguo.zhu@xxxxxxxxxxxxxxxxx>
Signed-off-by: Han Gao <gaohan@xxxxxxxxxxx>
---
arch/riscv/boot/dts/zhihe/a210.dtsi | 458 ++++++++++++++++++++++++++++++++++++
1 file changed, 458 insertions(+)

diff --git a/arch/riscv/boot/dts/zhihe/a210.dtsi b/arch/riscv/boot/dts/zhihe/a210.dtsi
new file mode 100644
index 000000000000..c7b623800aa7
--- /dev/null
+++ b/arch/riscv/boot/dts/zhihe/a210.dtsi
@@ -0,0 +1,458 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Copyright (C) 2021 Alibaba Group Holding Limited.
+ */
+
+#include <dt-bindings/clock/zhihe,a210-scmi.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/reset/zhihe,a210-scmi.h>
+
+/ {
+ compatible = "zhihe,a210";
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ cpus: cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ timebase-frequency = <24000000>;
+
+ cpu-map {
+ cluster0 {
+ core0 {
+ cpu = <&c908_0>;
+ };
+
+ core1 {
+ cpu = <&c908_1>;
+ };
+
+ core2 {
+ cpu = <&c908_2>;
+ };
+
+ core3 {
+ cpu = <&c908_3>;
+ };
+ };
+
+ cluster1 {
+ core0 {
+ cpu = <&c920_4>;
+ };
+
+ core1 {
+ cpu = <&c920_5>;
+ };
+
+ core2 {
+ cpu = <&c920_6>;
+ };
+
+ core3 {
+ cpu = <&c920_7>;
+ };
+ };
+ };
+
+ c0_l2_cache: l2-cache0 {
+ compatible = "cache";
+ cache-block-size = <64>;
+ cache-level = <2>;
+ cache-sets = <512>;
+ cache-size = <524288>;
+ cache-unified;
+ };
+
+ c1_l2_cache: l2-cache1 {
+ compatible = "cache";
+ cache-block-size = <64>;
+ cache-level = <2>;
+ cache-sets = <1024>;
+ cache-size = <1048576>;
+ cache-unified;
+ };
+
+ c908_0: cpu@0 {
+ device_type = "cpu";
+ compatible = "thead,c908", "riscv";
+ reg = <0>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <256>;
+ d-cache-size = <32768>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <256>;
+ i-cache-size = <32768>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c0_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu0_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c908_1: cpu@1 {
+ device_type = "cpu";
+ compatible = "thead,c908", "riscv";
+ reg = <1>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <256>;
+ d-cache-size = <32768>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <256>;
+ i-cache-size = <32768>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c0_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu1_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c908_2: cpu@2 {
+ device_type = "cpu";
+ compatible = "thead,c908", "riscv";
+ reg = <2>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <256>;
+ d-cache-size = <32768>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <256>;
+ i-cache-size = <32768>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c0_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu2_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c908_3: cpu@3 {
+ device_type = "cpu";
+ compatible = "thead,c908", "riscv";
+ reg = <3>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <256>;
+ d-cache-size = <32768>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <256>;
+ i-cache-size = <32768>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c0_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu3_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c920_4: cpu@4 {
+ device_type = "cpu";
+ compatible = "thead,c920", "riscv";
+ reg = <4>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <512>;
+ d-cache-size = <65536>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <512>;
+ i-cache-size = <65536>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c1_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu4_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c920_5: cpu@5 {
+ device_type = "cpu";
+ compatible = "thead,c920", "riscv";
+ reg = <5>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <512>;
+ d-cache-size = <65536>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <512>;
+ i-cache-size = <65536>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c1_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu5_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c920_6: cpu@6 {
+ device_type = "cpu";
+ compatible = "thead,c920", "riscv";
+ reg = <6>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <512>;
+ d-cache-size = <65536>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <512>;
+ i-cache-size = <65536>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c1_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu6_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ c920_7: cpu@7 {
+ device_type = "cpu";
+ compatible = "thead,c920", "riscv";
+ reg = <7>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <512>;
+ d-cache-size = <65536>;
+ i-cache-block-size = <64>;
+ i-cache-sets = <512>;
+ i-cache-size = <65536>;
+ mmu-type = "riscv,sv39";
+ next-level-cache = <&c1_l2_cache>;
+ riscv,cbom-block-size = <64>;
+ riscv,cbop-block-size = <64>;
+ riscv,cboz-block-size = <64>;
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+ "b", "v", "sscofpmf", "sstc",
+ "svpbmt", "zba", "zbb", "zbc",
+ "zbs", "zicbom", "zicbop",
+ "zicboz", "zicntr", "zicsr",
+ "zifencei", "zihpm";
+
+ cpu7_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+ };
+
+ firmware {
+ scmi {
+ compatible = "arm,scmi";
+ mboxes = <&mbox_e902 0>, <&mbox_e902 1>;
+ mbox-names = "tx", "rx";
+ shmem = <&scmi_shmem>, <&scmi_notification_shmem>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ scmi_clk: protocol@14 {
+ reg = <0x14>;
+ #clock-cells = <1>;
+ };
+
+ scmi_reset: protocol@16 {
+ reg = <0x16>;
+ #reset-cells = <1>;
+ };
+ };
+ };
+
+ soc {
+ compatible = "simple-bus";
+ ranges;
+ #address-cells = <2>;
+ dma-noncoherent;
+ #size-cells = <2>;
+
+ mbox_e902: mailbox@321000 {
+ compatible = "zhihe,a210-ap-mailbox";
+ reg = <0 0x00321000 0 0x1000>,
+ <0 0x00311000 0 0x1000>,
+ <0 0x00320000 0 0x1000>;
+ reg-names = "interrupt", "tx", "rx";
+ interrupt-parent = <&intc>;
+ interrupts = <336 IRQ_TYPE_LEVEL_HIGH>;
+ #mbox-cells = <1>;
+ };
+
+ peri3_padctrl: pinctrl@542000 {
+ compatible = "zhihe,a210-peri3-pinctrl";
+ reg = <0x0 0x00542000 0x0 0x1000>;
+ clocks = <&scmi_clk A210_CLK_PERI3_PAD>;
+ clock-names = "pclk";
+ resets = <&scmi_reset A210_RESET_PERI3_PAD>;
+
+ status = "disabled";
+ };
+
+ peri1_padctrl: pinctrl@2026000 {
+ compatible = "zhihe,a210-peri1-pinctrl";
+ reg = <0x0 0x02026000 0x0 0x1000>;
+ clocks = <&scmi_clk A210_CLK_PERI1_PAD>;
+ clock-names = "pclk";
+
+ status = "disabled";
+ };
+
+ peri2_padctrl: pinctrl@8411000 {
+ compatible = "zhihe,a210-peri2-pinctrl";
+ reg = <0x0 0x08411000 0x0 0x1000>;
+ clocks = <&scmi_clk A210_CLK_PERI2_PAD>;
+ clock-names = "pclk";
+ resets = <&scmi_reset A210_RESET_PERI2_PAD>;
+
+ status = "disabled";
+ };
+
+ intc: interrupt-controller@18000000 {
+ compatible = "zhihe,a210-plic", "thead,c900-plic";
+ reg = <0x0 0x18000000 0x0 0x04000000>;
+ #address-cells = <0>;
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ interrupts-extended = <&cpu0_intc 0xffffffff>,
+ <&cpu0_intc 9>,
+ <&cpu1_intc 0xffffffff>,
+ <&cpu1_intc 9>,
+ <&cpu2_intc 0xffffffff>,
+ <&cpu2_intc 9>,
+ <&cpu3_intc 0xffffffff>,
+ <&cpu3_intc 9>,
+ <&cpu4_intc 0xffffffff>,
+ <&cpu4_intc 9>,
+ <&cpu5_intc 0xffffffff>,
+ <&cpu5_intc 9>,
+ <&cpu6_intc 0xffffffff>,
+ <&cpu6_intc 9>,
+ <&cpu7_intc 0xffffffff>,
+ <&cpu7_intc 9>;
+ riscv,ndev = <351>;
+ };
+
+ clint0: clint@1c000000 {
+ compatible = "zhihe,a210-clint", "thead,c900-clint";
+ reg = <0x0 0x1c000000 0x0 0x0000d800>;
+ interrupts-extended = <&cpu0_intc 3>,
+ <&cpu0_intc 7>,
+ <&cpu1_intc 3>,
+ <&cpu1_intc 7>,
+ <&cpu2_intc 3>,
+ <&cpu2_intc 7>,
+ <&cpu3_intc 3>,
+ <&cpu3_intc 7>,
+ <&cpu4_intc 3>,
+ <&cpu4_intc 7>,
+ <&cpu5_intc 3>,
+ <&cpu5_intc 7>,
+ <&cpu6_intc 3>,
+ <&cpu6_intc 7>,
+ <&cpu7_intc 3>,
+ <&cpu7_intc 7>;
+ };
+
+ aon_padctrl: pinctrl@30848000 {
+ compatible = "zhihe,a210-aon-pinctrl";
+ reg = <0x0 0x30848000 0x0 0x2000>;
+ clocks = <&scmi_clk A210_CLK_AON_SYS>;
+ clock-names = "pclk";
+
+ status = "disabled";
+ };
+
+ sram@30907c00 {
+ compatible = "mmio-sram";
+ reg = <0 0x30907c00 0 0x200>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0 0x30907c00 0x200>;
+
+ scmi_shmem: scp-sram@0 {
+ compatible = "arm,scmi-shmem";
+ reg = <0 0x100>;
+ };
+
+ scmi_notification_shmem: scp-sram@100 {
+ compatible = "arm,scmi-shmem";
+ reg = <0x100 0x100>;
+ };
+ };
+ };
+};

--
2.55.0