dm: omap: serial: Add driver model support

Add driver model support to this driver, while retaining support for the
legacy system. Driver model serial support is enabled with CONFIG_DM_SERIAL
as usual.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>

drivers/serial/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_MXS_AUART) += mxs_auart.o
 obj-$(CONFIG_ARC_SERIAL) += serial_arc.o
 obj-$(CONFIG_TEGRA_SERIAL) += serial_tegra.o
 obj-$(CONFIG_UNIPHIER_SERIAL) += serial_uniphier.o
+obj-$(CONFIG_OMAP_SERIAL) += serial_omap.o
 
 ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_USB_TTY) += usbtty.o

drivers/serial/serial_omap.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <ns16550.h>
+#include <serial.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_OF_CONTROL
+static const struct udevice_id omap_serial_ids[] = {
+	{ .compatible = "ti,omap3-uart" },
+	{ }
+};
+
+static int omap_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;
+	plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+				     "clock-frequency", -1);
+	plat->reg_shift = 2;
+
+	return 0;
+}
+#endif
+
+U_BOOT_DRIVER(serial_omap_ns16550) = {
+	.name	= "serial_omap",
+	.id	= UCLASS_SERIAL,
+	.of_match = of_match_ptr(omap_serial_ids),
+	.ofdata_to_platdata = of_match_ptr(omap_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,
+};