The RP1 found on Raspberry Pi 5 board needs an external crystal at 50MHz.
Add clk_rp1_xosc node to provide that.

Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
---
 arch/arm64/boot/dts/broadcom/bcm2712.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
index 6e5a984c1d4e..efdf9abf04c4 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
@@ -38,6 +38,13 @@ clk_emmc2: clk-emmc2 {
 			clock-frequency = <200000000>;
 			clock-output-names = "emmc2-clock";
 		};
+
+		clk_rp1_xosc: clock-rp1-xosc {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-output-names = "rp1-xosc";
+			clock-frequency = <50000000>;
+		};
 	};
 
 	cpus: cpus {
-- 
2.35.3