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rockchip: Add serial support

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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>
This commit is contained in:
Simon Glass 2015-08-30 16:55:19 -06:00
parent c6aabe9289
commit 765a1b1eb3
3 changed files with 53 additions and 0 deletions
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9
drivers/serial/Kconfig
View File

@ -109,6 +109,15 @@ config DEBUG_UART_SHIFT
value. Use this value to specify the shift to use, where 0=byte
registers, 2=32-bit word registers, etc.
config ROCKCHIP_SERIAL
bool "Rockchip on-chip UART support"
depends on ARCH_UNIPHIER && DM_SERIAL
help
Select this to enable a debug UART for Rockchip devices. This uses
the ns16550 driver. You will need to #define CONFIG_SYS_NS16550 in
your board config header. The clock input is automatically set to
use the oscillator (24MHz).
config SANDBOX_SERIAL
bool "Sandbox UART support"
depends on SANDBOX && DM

1
drivers/serial/Makefile
View File

@ -40,6 +40,7 @@ obj-$(CONFIG_ZYNQ_SERIAL) += serial_zynq.o
obj-$(CONFIG_BFIN_SERIAL) += serial_bfin.o
obj-$(CONFIG_FSL_LPUART) += serial_lpuart.o
obj-$(CONFIG_MXS_AUART) += mxs_auart.o
obj-$(CONFIG_ROCKCHIP_SERIAL) += serial_rockchip.o
obj-$(CONFIG_ARC_SERIAL) += serial_arc.o
obj-$(CONFIG_TEGRA_SERIAL) += serial_tegra.o
obj-$(CONFIG_UNIPHIER_SERIAL) += serial_uniphier.o

43
drivers/serial/serial_rockchip.c Normal file
View File

@ -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,
};