[RFC PATCH 5/5] arm64: dts: imx93-kontron: Add DMA memory region for ELE firmware

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>

The Edgelock Enclave firmware requires a small 1 MiB memory pool.
Reserving this pool makes the ELE firmware driver probe and allows
us to use the S400 API.

Signed-off-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
---
 .../boot/dts/freescale/imx93-kontron-osm-s.dtsi  | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-kontron-osm-s.dtsi b/arch/arm64/boot/dts/freescale/imx93-kontron-osm-s.dtsi
index 119a16207059..44d98cf812bf 100644
--- a/arch/arm64/boot/dts/freescale/imx93-kontron-osm-s.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93-kontron-osm-s.dtsi
@@ -24,6 +24,18 @@ chosen {
 		stdout-path = &lpuart1;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ele_reserved: memory@90000000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0x90000000 0 0x100000>;
+			no-map;
+		};
+	};
+
 	reg_usdhc2_vcc: regulator-usdhc2-vcc {
 		compatible = "regulator-fixed";
 		pinctrl-names = "default";
@@ -116,6 +128,10 @@ &gpio4 {
 			  "GPIO_B_0", "CARRIER_PWR_EN";
 };
 
+&hsm0 {
+	memory-region = <&ele_reserved>;
+};
+
 &lpi2c1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_lpi2c1>;
-- 
2.49.0