u-boot/drivers/serial/serial_x86.c
Bin Meng 1eb47efc49 x86: Use ePAPR defined properties for x86-uart
Use ePAPR defined properties for x86-uart: clock-frequency and
current-speed. Assign the value of clock-frequency in device tree
to plat->clock of x86-uart instead of using hardcoded number.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-01-13 07:24:57 -08:00

45 lines
951 B
C

/*
* 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;
static const struct udevice_id x86_serial_ids[] = {
{ .compatible = "x86-uart" },
{ }
};
static int x86_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", 1843200);
return 0;
}
U_BOOT_DRIVER(serial_ns16550) = {
.name = "serial_x86",
.id = UCLASS_SERIAL,
.of_match = x86_serial_ids,
.ofdata_to_platdata = x86_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,
};