arm64: dts: r8a7796: Add external PCIe bus clock

Add the external PCIe bus clock as a zero Hz fixed-frequency clock.
Boards that provide this clock should override it.

Based on r8a7795.dtsi.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a7796.dtsi b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
index 101cd41..8e2aab8 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
@@ -157,6 +157,13 @@
                clock-frequency = <0>;
        };
 
+       /* External PCIe clock - can be overridden by the board */
+       pcie_bus_clk: pcie_bus {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <0>;
+       };
+
        soc {
                compatible = "simple-bus";
                interrupt-parent = <&gic>;