1 files changed, 40 insertions, 0 deletions
diff --git a/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts b/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts
new file mode 100644
index 000000000000..692c696e1ab4
--- /dev/null
+++ b/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ * Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk>
+ */
+
+/dts-v1/;
+#include "jh7100-common.dtsi"
+
+/ {
+	model = "StarFive VisionFive V1";
+	compatible = "starfive,visionfive-v1", "starfive,jh7100";
+
+	gpio-restart {
+		compatible = "gpio-restart";
+		gpios = <&gpio 63 GPIO_ACTIVE_HIGH>;
+		priority = <224>;
+	};
+};
+
+&gmac {
+	phy-handle = <&phy>;
+};
+
+/*
+ * The board uses a Motorcomm YT8521 PHY supporting RGMII-ID, but requires
+ * manual adjustment of the RX internal delay to work properly.  The default
+ * RX delay provided by the driver (1.95ns) is too high, but applying a 50%
+ * reduction seems to mitigate the issue.
+ *
+ * It is worth noting the adjustment is not necessary on BeagleV Starlight SBC,
+ * which uses a Microchip PHY.  Hence, most likely the Motorcomm PHY is the one
+ * responsible for the misbehaviour, not the GMAC.
+ */
+&mdio {
+	phy: ethernet-phy@0 {
+		reg = <0>;
+		rx-internal-delay-ps = <900>;
+	};
+};