rockchip: Add serial support

Add support for the Rockchip serial device using the ns16550 driver.
This uses driver model and device tree for both SPL and U-Boot proper.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/drivers/serial/serial_rockchip.c b/drivers/serial/serial_rockchip.c
new file mode 100644
index 0000000000..0e7bbfc690
--- /dev/null
+++ b/drivers/serial/serial_rockchip.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ns16550.h>
+#include <serial.h>
+#include <asm/arch/clock.h>
+
+static const struct udevice_id rockchip_serial_ids[] = {
+	{ .compatible = "rockchip,rk3288-uart" },
+	{ }
+};
+
+static int rockchip_serial_ofdata_to_platdata(struct udevice *dev)
+{
+	struct ns16550_platdata *plat = dev_get_platdata(dev);
+	int ret;
+
+	ret = ns16550_serial_ofdata_to_platdata(dev);
+	if (ret)
+		return ret;
+
+	/* Do all Rockchip parts use 24MHz? */
+	plat->clock = 24 * 1000000;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(serial_ns16550) = {
+	.name	= "serial_rockchip",
+	.id	= UCLASS_SERIAL,
+	.of_match = rockchip_serial_ids,
+	.ofdata_to_platdata = rockchip_serial_ofdata_to_platdata,
+	.platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
+	.priv_auto_alloc_size = sizeof(struct NS16550),
+	.probe = ns16550_serial_probe,
+	.ops	= &ns16550_serial_ops,
+	.flags	= DM_FLAG_PRE_RELOC,
+};