diff --git a/sys/dev/uart/uart_bus_fdt.c b/sys/dev/uart/uart_bus_fdt.c
--- a/sys/dev/uart/uart_bus_fdt.c
+++ b/sys/dev/uart/uart_bus_fdt.c
@@ -238,6 +238,12 @@
 			clk = 0;
 	}
 
+	/*
+	 * Grab the default rclk from the uart class.
+	 */
+	if (clk == 0)
+		clk = class->uc_rclk;
+
 	/*
 	 * Retrieve serial attributes.
 	 */
diff --git a/sys/dev/uart/uart_dev_snps.c b/sys/dev/uart/uart_dev_snps.c
--- a/sys/dev/uart/uart_dev_snps.c
+++ b/sys/dev/uart/uart_dev_snps.c
@@ -113,7 +113,17 @@
 	.uc_rclk = 0,
 };
 
+struct uart_class uart_snps_jh7110_class = {
+	"snps",
+	snps_methods,
+	sizeof(struct snps_softc),
+	.uc_ops = &uart_ns8250_ops,
+	.uc_range = 8,
+	.uc_rclk = 24000000,
+};
+
 static struct ofw_compat_data compat_data[] = {
+	{ "starfive,jh7110-uart",	(uintptr_t)&uart_snps_jh7110_class },
 	{ "snps,dw-apb-uart",		(uintptr_t)&uart_snps_class },
 	{ "marvell,armada-38x-uart",	(uintptr_t)&uart_snps_class },
 	{ NULL,				(uintptr_t)NULL }