[PATCH v5 19/21] riscv: dts: thead: Introduce power domain nodes with aon firmware

Michal Wilczynski
2025-02-19T14:03:18Z

The DRM Imagination GPU requires a power-domain driver. In the T-HEAD
TH1520 SoC implements power management capabilities through the E902
core, which can be communicated with through the mailbox, using firmware
protocol.

Add AON node, which servers as a power-domain controller.

Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
---
arch/riscv/boot/dts/thead/th1520.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index 197df1f32b25..474f31576a1b 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -6,6 +6,7 @@

#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/clock/thead,th1520-clk-ap.h>
+#include <dt-bindings/power/thead,th1520-power.h>

/ {
compatible = "thead,th1520";
@@ -229,6 +230,13 @@ stmmac_axi_config: stmmac-axi-config {
snps,blen = <0 0 64 32 0 0 0>;
};

+ aon: aon {
+ compatible = "thead,th1520-aon";
+ mboxes = <&mbox_910t 1>;
+ mbox-names = "aon";
+ #power-domain-cells = <1>;
+ };
+
soc {
compatible = "simple-bus";
interrupt-parent = <&plic>;
--
2.34.1