riscv: dts: canaan: Add basic device tree for K230 CanMV board

Add initial dts for K230-CanMV powered by Canaan Kendryte K230 SoC,
which has two RISC-V C908 cores, a big core with vector 1.0 extension
and a small core without vector extension.

This patch is basically comes from Linux Kernel [1] and it assumes
u-boot is running on the big core. Additionally, bootctl and reboot nodes
are added to support sysreset [2] and an clk_dummy node is added to
satisfy dependencies for usb [3].

Currently, u-boot is booted by the vendor's u-boot-spl. To meet the
requirements [4][5] of vendor's u-boot-spl for u-boot, a binman node with
mkimage child node is added here, which will compress u-boot.bin with
gzip and generate an image named "uboot" in the file u-boot-gz.img.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/log/?h=k230-basic
[2] https://github.com/kendryte/k230_sdk/blob/v1.8/src/big/rt-smart/kernel/bsp/maix3/board/interdrv/sysctl/sysctl_boot/sysctl_boot.c#L67
[3] https://lore.kernel.org/linux-riscv/tencent_AD84B436C2F31108B66B4739D6E306C5E80A@qq.com/
[4] https://github.com/kendryte/k230_sdk/blob/v1.8/src/little/uboot/board/canaan/common/k230_img.c#L306
[5] https://github.com/kendryte/k230_sdk/blob/v1.8/src/little/uboot/board/canaan/common/k230_img.c#L125

Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

diff --git a/arch/riscv/dts/Makefile b/arch/riscv/dts/Makefile
index b64fc0d..cf1872f 100644 (file)
--- a/arch/riscv/dts/Makefile
+++ b/arch/riscv/dts/Makefile
@@ -2,6 +2,7 @@
 
 dtb-$(CONFIG_TARGET_ANDES_AE350) += ae350_32.dtb ae350_64.dtb
 dtb-$(CONFIG_TARGET_BANANAPI_F3) += k1-bananapi-f3.dtb
+dtb-$(CONFIG_TARGET_K230_CANMV) += k230-canmv.dtb
 dtb-$(CONFIG_TARGET_MICROCHIP_ICICLE) += mpfs-icicle-kit.dtb
 dtb-$(CONFIG_TARGET_MILKV_DUO) += cv1800b-milkv-duo.dtb
 dtb-$(CONFIG_TARGET_LICHEERV_NANO) += sg2002-licheerv-nano-b.dtb

diff --git a/arch/riscv/dts/k230-canmv.dts b/arch/riscv/dts/k230-canmv.dts
new file mode 100644 (file)
index 0000000..ced9c45
--- /dev/null
+++ b/arch/riscv/dts/k230-canmv.dts
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ * Copyright (C) 2025 Junhui Liu <junhui.liu@pigmoral.tech>
+ */
+
+/dts-v1/;
+#include "k230.dtsi"
+
+/ {
+       model = "Canaan CanMV-K230";
+       compatible = "canaan,canmv-k230", "canaan,kendryte-k230";
+
+       chosen {
+               stdout-path = "serial0:115200n8";
+       };
+
+       memory@0 {
+               device_type = "memory";
+               reg = <0x0 0x0 0x0 0x20000000>;
+       };
+};
+
+&uart0 {
+       status = "okay";
+};
+
+/* onboard RTL8152 */
+&usb1 {
+       status = "okay";
+};

diff --git a/arch/riscv/dts/k230-u-boot.dtsi b/arch/riscv/dts/k230-u-boot.dtsi
new file mode 100644 (file)
index 0000000..bb66ad3
--- /dev/null
+++ b/arch/riscv/dts/k230-u-boot.dtsi
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2025 Junhui Liu <junhui.liu@pigmoral.tech>
+ */
+
+#include <linux/stringify.h>
+
+/ {
+       binman: binman {
+       };
+};
+
+&binman {
+       mkimage {
+               filename = "u-boot-gz.img";
+               args = "-A", "riscv", "-T", "firmware", "-O", "u-boot",
+                       "-C", "gzip", "-n", "uboot",
+                       "-a", __stringify(CONFIG_TEXT_BASE),
+                       "-e", __stringify(CONFIG_TEXT_BASE);
+               blob {
+                       filename = "u-boot.bin";
+                       compress = "gzip";
+               };
+       };
+};

diff --git a/arch/riscv/dts/k230.dtsi b/arch/riscv/dts/k230.dtsi
new file mode 100644 (file)
index 0000000..cf59667
--- /dev/null
+++ b/arch/riscv/dts/k230.dtsi
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ * Copyright (C) 2025 Junhui Liu <junhui.liu@pigmoral.tech>
+ */
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+       #address-cells = <2>;
+       #size-cells = <2>;
+       compatible = "canaan,kendryte-k230";
+
+       aliases {
+               serial0 = &uart0;
+               serial1 = &uart1;
+               serial2 = &uart2;
+               serial3 = &uart3;
+               serial4 = &uart4;
+       };
+
+       cpus {
+               #address-cells = <1>;
+               #size-cells = <0>;
+               timebase-frequency = <27000000>;
+
+               cpu@0 {
+                       compatible = "thead,c908", "riscv";
+                       device_type = "cpu";
+                       reg = <0>;
+                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zfh_zba_zbb_zbc_zbs_zvfh_svpbmt";
+                       riscv,isa-base = "rv64i";
+                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
+                                              "zicbop", "zicboz", "zicntr", "zicsr", "zifencei",
+                                              "zihpm", "zfh", "zba", "zbb", "zbc", "zbs", "zvfh",
+                                              "svpbmt";
+                       riscv,cbom-block-size = <64>;
+                       riscv,cbop-block-size = <64>;
+                       riscv,cboz-block-size = <64>;
+                       mmu-type = "riscv,sv39";
+
+                       cpu0_intc: interrupt-controller {
+                               compatible = "riscv,cpu-intc";
+                               interrupt-controller;
+                               #interrupt-cells = <1>;
+                       };
+               };
+       };
+
+       apb_clk: apb-clk-clock {
+               compatible = "fixed-clock";
+               clock-frequency = <50000000>;
+               clock-output-names = "apb_clk";
+               #clock-cells = <0>;
+       };
+
+       clk_dummy: clock-dummy {
+               compatible = "fixed-clock";
+               clock-frequency = <0>;
+               clock-output-names = "clk_dummy";
+               #clock-cells = <0>;
+       };
+
+       reboot: syscon-reboot {
+               compatible = "syscon-reboot";
+               regmap = <&bootctl>;
+               offset = <0x60>;
+               mask = <0x10001>;
+               value = <0x10001>;
+       };
+
+       soc {
+               compatible = "simple-bus";
+               interrupt-parent = <&plic>;
+               #address-cells = <2>;
+               #size-cells = <2>;
+               dma-noncoherent;
+               ranges;
+
+               bootctl: syscon@0x91102000 {
+                       compatible = "syscon";
+                       reg = <0x0 0x91102000 0x0 0x1000>;
+               };
+
+               plic: interrupt-controller@f00000000 {
+                       compatible = "canaan,k230-plic" ,"thead,c900-plic";
+                       reg = <0xf 0x00000000 0x0 0x04000000>;
+                       interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>;
+                       interrupt-controller;
+                       #address-cells = <0>;
+                       #interrupt-cells = <2>;
+                       riscv,ndev = <208>;
+               };
+
+               clint: timer@f04000000 {
+                       compatible = "canaan,k230-clint", "thead,c900-clint";
+                       reg = <0xf 0x04000000 0x0 0x00010000>;
+                       interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
+               };
+
+               uart0: serial@91400000 {
+                       compatible = "snps,dw-apb-uart";
+                       reg = <0x0 0x91400000 0x0 0x1000>;
+                       clocks = <&apb_clk>;
+                       interrupts = <16 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart1: serial@91401000 {
+                       compatible = "snps,dw-apb-uart";
+                       reg = <0x0 0x91401000 0x0 0x1000>;
+                       clocks = <&apb_clk>;
+                       interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart2: serial@91402000 {
+                       compatible = "snps,dw-apb-uart";
+                       reg = <0x0 0x91402000 0x0 0x1000>;
+                       clocks = <&apb_clk>;
+                       interrupts = <18 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart3: serial@91403000 {
+                       compatible = "snps,dw-apb-uart";
+                       reg = <0x0 0x91403000 0x0 0x1000>;
+                       clocks = <&apb_clk>;
+                       interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart4: serial@91404000 {
+                       compatible = "snps,dw-apb-uart";
+                       reg = <0x0 0x91404000 0x0 0x1000>;
+                       clocks = <&apb_clk>;
+                       interrupts = <20 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               usb0: usb@91500000 {
+                       compatible = "canaan,k230-otg", "snps,dwc2";
+                       reg = <0x0 0x91500000 0x0 0x40000>;
+                       interrupts = <173 IRQ_TYPE_LEVEL_HIGH>;
+                       clocks = <&clk_dummy>;
+                       clock-names = "otg";
+                       g-rx-fifo-size = <512>;
+                       g-np-tx-fifo-size = <64>;
+                       g-tx-fifo-size = <512 1024 64 64 64 64>;
+                       status = "disabled";
+               };
+
+               usb1: usb@91540000 {
+                       compatible = "canaan,k230-otg", "snps,dwc2";
+                       reg = <0x0 0x91540000 0x0 0x40000>;
+                       interrupts = <174 IRQ_TYPE_LEVEL_HIGH>;
+                       clocks = <&clk_dummy>;
+                       clock-names = "otg";
+                       g-rx-fifo-size = <512>;
+                       g-np-tx-fifo-size = <64>;
+                       g-tx-fifo-size = <512 1024 64 64 64 64>;
+                       status = "disabled";
+               };
+       };
+};