lib: utils: serial: Add Cadence UART driver

Add Cadence UART driver

Signed-off-by: Jun Liang Tan <junliang.tan@linux.starfivetech.com>
Signed-off-by: Wei Liang Lim <weiliang.lim@linux.starfivetech.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

lib/utils/serial/fdt_serial_cadence.c

@@ -0,0 +1,35 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 StarFive Technology Co., Ltd.
+ *
+ * Author: Jun Liang Tan <junliang.tan@linux.starfivetech.com>
+ */
+
+#include <sbi_utils/fdt/fdt_helper.h>
+#include <sbi_utils/serial/fdt_serial.h>
+#include <sbi_utils/serial/cadence-uart.h>
+
+static int serial_cadence_init(void *fdt, int nodeoff,
+			       const struct fdt_match *match)
+{
+	int rc;
+	struct platform_uart_data uart = { 0 };
+
+	rc = fdt_parse_uart_node(fdt, nodeoff, &uart);
+	if (rc)
+		return rc;
+
+	return cadence_uart_init(uart.addr, uart.freq, uart.baud);
+}
+
+static const struct fdt_match serial_cadence_match[] = {
+	{ .compatible = "cdns,uart-r1p12" },
+	{ .compatible = "starfive,jh8100-uart" },
+	{ },
+};
+
+struct fdt_serial fdt_serial_cadence = {
+	.match_table = serial_cadence_match,
+	.init = serial_cadence_init
+};