arm64: dts: rockchip: Add support of external clock to ethernet node on Rock 3A SBC

Add support of external clock gmac1_clkin which is used as input clock
to ethernet node.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
Tested-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20221116200150.4657-3-linux.amoon@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
index ef9b490..ff956c5 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
@@ -32,6 +32,13 @@
                };
        };
 
+       gmac1_clkin: external-gmac1-clock {
+               compatible = "fixed-clock";
+               clock-frequency = <125000000>;
+               clock-output-names = "gmac1_clkin";
+               #clock-cells = <0>;
+       };
+
        leds {
                compatible = "gpio-leds";
 
@@ -249,9 +256,8 @@
 
 &gmac1 {
        assigned-clocks = <&cru SCLK_GMAC1_RX_TX>, <&cru SCLK_GMAC1>;
-       assigned-clock-parents = <&cru SCLK_GMAC1_RGMII_SPEED>;
-       assigned-clock-rates = <0>, <125000000>;
-       clock_in_out = "output";
+       assigned-clock-parents = <&cru SCLK_GMAC1_RGMII_SPEED>, <&gmac1_clkin>;
+       clock_in_out = "input";
        phy-handle = <&rgmii_phy1>;
        phy-mode = "rgmii-id";
        pinctrl-names = "default";
@@ -259,6 +265,7 @@
                     &gmac1m1_tx_bus2
                     &gmac1m1_rx_bus2
                     &gmac1m1_rgmii_clk
+                    &gmac1m1_clkinout
                     &gmac1m1_rgmii_bus>;
        status = "okay";
 };