[PATCH 2/3] arm64: dts: st: set RIFSC as an access controller on stm32mp21x platforms

Gatien Chevallier
2025-11-04T13:55:23Z

Similarly to stm32mp23x/25x platforms, the RIFSC is a firewall
controller. Declare it as an access controller, keep the "simple-bus"
compatible in case CONFIG_STM32_FIREWALL is not set and update the
child nodes.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
---
arch/arm64/boot/dts/st/stm32mp211.dtsi | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/st/stm32mp211.dtsi b/arch/arm64/boot/dts/st/stm32mp211.dtsi
index bf888d60cd4f..cd078a16065e 100644
--- a/arch/arm64/boot/dts/st/stm32mp211.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp211.dtsi
@@ -94,18 +94,20 @@ soc@0 {
#size-cells = <2>;

rifsc: bus@42080000 {
- compatible = "simple-bus";
+ compatible = "st,stm32mp21-rifsc", "simple-bus";
reg = <0x42080000 0x0 0x1000>;
ranges;
dma-ranges;
#address-cells = <1>;
#size-cells = <2>;
+ #access-controller-cells = <1>;

usart2: serial@400e0000 {
compatible = "st,stm32h7-uart";
reg = <0x400e0000 0x0 0x400>;
interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&ck_flexgen_08>;
+ access-controllers = <&rifsc 32>;
status = "disabled";
};
};

--
2.43.0