arm64: dts: rockchip: Add base DT for rk3528 SoC

This initial device tree describes CPU, interrupts and UART on the chip
and is able to boot into basic kernel with only UART. Cache information
is omitted for now as there is no precise documentation. Support for
other features will be added later.

Signed-off-by: Yao Zi <ziyao@disroot.org>
Link: https://lore.kernel.org/r/20240829092705.6241-4-ziyao@disroot.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3528.dtsi b/arch/arm64/boot/dts/rockchip/rk3528.dtsi
new file mode 100644 (file)
index 0000000..e58faa9
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3528.dtsi
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
+ * Copyright (c) 2024 Yao Zi <ziyao@disroot.org>
+ */
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+       compatible = "rockchip,rk3528";
+
+       interrupt-parent = <&gic>;
+       #address-cells = <2>;
+       #size-cells = <2>;
+
+       aliases {
+               serial0 = &uart0;
+               serial1 = &uart1;
+               serial2 = &uart2;
+               serial3 = &uart3;
+               serial4 = &uart4;
+               serial5 = &uart5;
+               serial6 = &uart6;
+               serial7 = &uart7;
+       };
+
+       cpus {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               cpu-map {
+                       cluster0 {
+                               core0 {
+                                       cpu = <&cpu0>;
+                               };
+                               core1 {
+                                       cpu = <&cpu1>;
+                               };
+                               core2 {
+                                       cpu = <&cpu2>;
+                               };
+                               core3 {
+                                       cpu = <&cpu3>;
+                               };
+                       };
+               };
+
+               cpu0: cpu@0 {
+                       compatible = "arm,cortex-a53";
+                       reg = <0x0>;
+                       device_type = "cpu";
+                       enable-method = "psci";
+               };
+
+               cpu1: cpu@1 {
+                       compatible = "arm,cortex-a53";
+                       reg = <0x1>;
+                       device_type = "cpu";
+                       enable-method = "psci";
+               };
+
+               cpu2: cpu@2 {
+                       compatible = "arm,cortex-a53";
+                       reg = <0x2>;
+                       device_type = "cpu";
+                       enable-method = "psci";
+               };
+
+               cpu3: cpu@3 {
+                       compatible = "arm,cortex-a53";
+                       reg = <0x3>;
+                       device_type = "cpu";
+                       enable-method = "psci";
+               };
+       };
+
+       psci {
+               compatible = "arm,psci-1.0", "arm,psci-0.2";
+               method = "smc";
+       };
+
+       timer {
+               compatible = "arm,armv8-timer";
+               interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+                            <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+                            <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+                            <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+       };
+
+       xin24m: clock-xin24m {
+               compatible = "fixed-clock";
+               clock-frequency = <24000000>;
+               clock-output-names = "xin24m";
+               #clock-cells = <0>;
+       };
+
+       soc {
+               compatible = "simple-bus";
+               ranges = <0x0 0xfe000000 0x0 0xfe000000 0x0 0x2000000>;
+               #address-cells = <2>;
+               #size-cells = <2>;
+
+               gic: interrupt-controller@fed01000 {
+                       compatible = "arm,gic-400";
+                       reg = <0x0 0xfed01000 0 0x1000>,
+                             <0x0 0xfed02000 0 0x2000>,
+                             <0x0 0xfed04000 0 0x2000>,
+                             <0x0 0xfed06000 0 0x2000>;
+                       interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) |
+                                                IRQ_TYPE_LEVEL_LOW)>;
+                       interrupt-controller;
+                       #address-cells = <0>;
+                       #interrupt-cells = <3>;
+               };
+
+               uart0: serial@ff9f0000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xff9f0000 0x0 0x100>;
+                       clock-frequency = <24000000>;
+                       interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart1: serial@ff9f8000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xff9f8000 0x0 0x100>;
+                       interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart2: serial@ffa00000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xffa00000 0x0 0x100>;
+                       interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart3: serial@ffa08000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xffa08000 0x0 0x100>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart4: serial@ffa10000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xffa10000 0x0 0x100>;
+                       interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart5: serial@ffa18000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xffa18000 0x0 0x100>;
+                       interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart6: serial@ffa20000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xffa20000 0x0 0x100>;
+                       interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+
+               uart7: serial@ffa28000 {
+                       compatible = "rockchip,rk3528-uart", "snps,dw-apb-uart";
+                       reg = <0x0 0xffa28000 0x0 0x100>;
+                       interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+                       status = "disabled";
+               };
+       };
+};