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rockchip: serial: Add an of-platdata driver for rockchip

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Add a driver that works with of-platdata. It sets up the platform data and
calls the standard ns16550 driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2016-07-04 11:58:24 -06:00
parent b2927fbaa8
commit 2fc24d5335
3 changed files with 55 additions and 0 deletions
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9
drivers/serial/Kconfig
View File

@ -312,6 +312,15 @@ config SYS_NS16550
be used. It can be a constant or a function to get clock, eg,
get_serial_clock().
config ROCKCHIP_SERIAL
bool "Rockchip on-chip UART support"
depends on DM_SERIAL && SPL_OF_PLATDATA
help
Select this to enable a debug UART for Rockchip devices when using
CONFIG_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
This uses the ns16550 driver, converting the platdata from of-platdata
to the ns16550 format.
config SANDBOX_SERIAL
bool "Sandbox UART support"
depends on SANDBOX

3
drivers/serial/Makefile
View File

@ -28,6 +28,9 @@ obj-$(CONFIG_S5P) += serial_s5p.o
obj-$(CONFIG_MXC_UART) += serial_mxc.o
obj-$(CONFIG_PXA_SERIAL) += serial_pxa.o
obj-$(CONFIG_MESON_SERIAL) += serial_meson.o
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_ROCKCHIP_SERIAL) += serial_rockchip.o
endif
obj-$(CONFIG_S3C24X0_SERIAL) += serial_s3c24x0.o
obj-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
obj-$(CONFIG_SANDBOX_SERIAL) += sandbox.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 <debug_uart.h>
#include <dm.h>
#include <dt-structs.h>
#include <ns16550.h>
#include <serial.h>
#include <asm/arch/clock.h>
struct rockchip_uart_platdata {
struct dtd_rockchip_rk3288_uart dtplat;
struct ns16550_platdata plat;
};
struct dtd_rockchip_rk3288_uart *dtplat, s_dtplat;
static int rockchip_serial_probe(struct udevice *dev)
{
struct rockchip_uart_platdata *plat = dev_get_platdata(dev);
/* Create some new platform data for the standard driver */
plat->plat.base = plat->dtplat.reg[0];
plat->plat.reg_shift = plat->dtplat.reg_shift;
plat->plat.clock = plat->dtplat.clock_frequency;
dev->platdata = &plat->plat;
return ns16550_serial_probe(dev);
}
U_BOOT_DRIVER(rockchip_rk3288_uart) = {
.name = "rockchip_rk3288_uart",
.id = UCLASS_SERIAL,
.priv_auto_alloc_size = sizeof(struct NS16550),
.platdata_auto_alloc_size = sizeof(struct rockchip_uart_platdata),
.probe = rockchip_serial_probe,
.ops = &ns16550_serial_ops,
.flags = DM_FLAG_PRE_RELOC,
};