riscv: dts: thead: Introduce power domain nodes with aon firmware

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>
Reviewed-by: Drew Fustini <drew@pdp7.com>
Signed-off-by: Drew Fustini <drew@pdp7.com>

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index 527336417765d8470426f2985e1bc22eeafb31aa..fa7985e89d45931d1b80e4ee0f2e156a3f8283ee 100644 (file)
--- 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 @@
                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>;