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MIPS: JZ4740: use Ingenic SoC UART driver 

Remove the serial support from arch/mips/jz4740 & make use of the new
Ingenic SoC UART driver. This is done for both regular & early console
output.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Apelete Seketeli <apelete@seketeli.net>
Cc: Alexandre Courbot <gnurou@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10160/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2015-05-24 16:11:45 +01:00 committed by Ralf Baechle
parent 0cf985f487
commit 8838245d76
11 changed files with 28 additions and 120 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/mips/Kconfig
View File

@ -297,7 +297,6 @@ config MACH_INGENIC
select DMA_NONCOHERENT
select IRQ_MIPS_CPU
select ARCH_REQUIRE_GPIOLIB
select SYS_HAS_EARLY_PRINTK
select COMMON_CLK
select GENERIC_IRQ_CHIP
select BUILTIN_DTB

22
arch/mips/boot/dts/ingenic/jz4740.dtsi
View File

@ -43,4 +43,26 @@
#clock-cells = <1>;
};
uart0: serial@10030000 {
compatible = "ingenic,jz4740-uart";
reg = <0x10030000 0x100>;
interrupt-parent = <&intc>;
interrupts = <9>;
clocks = <&ext>, <&cgu JZ4740_CLK_UART0>;
clock-names = "baud", "module";
};
uart1: serial@10031000 {
compatible = "ingenic,jz4740-uart";
reg = <0x10031000 0x100>;
interrupt-parent = <&intc>;
interrupts = <8>;
clocks = <&ext>, <&cgu JZ4740_CLK_UART1>;
clock-names = "baud", "module";
};
};

4
arch/mips/boot/dts/ingenic/qi_lb60.dts
View File

@ -4,6 +4,10 @@
/ {
compatible = "qi,lb60", "ingenic,jz4740";
chosen {
stdout-path = &uart0;
};
};
&ext {

1
arch/mips/configs/qi_lb60_defconfig
View File

@ -66,6 +66,7 @@ CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_SERIAL_8250_DMA is not set
CONFIG_SERIAL_8250_NR_UARTS=2
CONFIG_SERIAL_8250_RUNTIME_UARTS=2
CONFIG_SERIAL_8250_INGENIC=y
# CONFIG_HW_RANDOM is not set
CONFIG_SPI=y
CONFIG_SPI_GPIO=y

2
arch/mips/include/asm/mach-jz4740/platform.h
View File

@ -35,6 +35,4 @@ extern struct platform_device jz4740_wdt_device;
extern struct platform_device jz4740_pwm_device;
extern struct platform_device jz4740_dma_device;
void jz4740_serial_device_register(void);
#endif

2
arch/mips/jz4740/Makefile
View File

@ -5,7 +5,7 @@
# Object file lists.
obj-y += prom.o time.o reset.o setup.o \
gpio.o platform.o timer.o serial.o
gpio.o platform.o timer.o
CFLAGS_setup.o = -I$(src)/../../../scripts/dtc/libfdt

2
arch/mips/jz4740/board-qi_lb60.c
View File

@ -482,8 +482,6 @@ static int __init qi_lb60_init_platform_devices(void)
gpiod_add_lookup_table(&qi_lb60_audio_gpio_table);
gpiod_add_lookup_table(&qi_lb60_nand_gpio_table);
jz4740_serial_device_register();
spi_register_board_info(qi_lb60_spi_board_info,
ARRAY_SIZE(qi_lb60_spi_board_info));

45
arch/mips/jz4740/platform.c
View File

@ -30,7 +30,6 @@
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include "serial.h"
#include "clock.h"
/* OHCI controller */
@ -280,50 +279,6 @@ struct platform_device jz4740_adc_device = {
.resource = jz4740_adc_resources,
};
/* Serial */
#define JZ4740_UART_DATA(_id) \
{ \
.flags = UPF_SKIP_TEST | UPF_IOREMAP | UPF_FIXED_TYPE, \
.iotype = UPIO_MEM, \
.regshift = 2, \
.serial_out = jz4740_serial_out, \
.type = PORT_16550, \
.mapbase = JZ4740_UART ## _id ## _BASE_ADDR, \
.irq = JZ4740_IRQ_UART ## _id, \
}
static struct plat_serial8250_port jz4740_uart_data[] = {
JZ4740_UART_DATA(0),
JZ4740_UART_DATA(1),
{},
};
static struct platform_device jz4740_uart_device = {
.name = "serial8250",
.id = 0,
.dev = {
.platform_data = jz4740_uart_data,
},
};
void jz4740_serial_device_register(void)
{
struct plat_serial8250_port *p;
struct clk *ext_clk;
unsigned long ext_rate;
ext_clk = clk_get(NULL, "ext");
if (IS_ERR(ext_clk))
panic("unable to get ext clock");
ext_rate = clk_get_rate(ext_clk);
clk_put(ext_clk);
for (p = jz4740_uart_data; p->flags != 0; ++p)
p->uartclk = ext_rate;
platform_device_register(&jz4740_uart_device);
}
/* Watchdog */
static struct resource jz4740_wdt_resources[] = {
{

13
arch/mips/jz4740/prom.c
View File

@ -53,16 +53,3 @@ void __init prom_init(void)
void __init prom_free_prom_memory(void)
{
}
#define UART_REG(_reg) ((void __iomem *)CKSEG1ADDR(JZ4740_UART0_BASE_ADDR + (_reg << 2)))
void prom_putchar(char c)
{
uint8_t lsr;
do {
lsr = readb(UART_REG(UART_LSR));
} while ((lsr & UART_LSR_TEMT) == 0);
writeb(c, UART_REG(UART_TX));
}

33
arch/mips/jz4740/serial.c
View File

@ -1,33 +0,0 @@
/*
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
* JZ4740 serial support
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/io.h>
#include <linux/serial_core.h>
#include <linux/serial_reg.h>
void jz4740_serial_out(struct uart_port *p, int offset, int value)
{
switch (offset) {
case UART_FCR:
value |= 0x10; /* Enable uart module */
break;
case UART_IER:
value |= (value & 0x4) << 2;
break;
default:
break;
}
writeb(value, p->membase + (offset << p->regshift));
}

23
arch/mips/jz4740/serial.h
View File

@ -1,23 +0,0 @@
/*
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
* JZ4740 serial support
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef __MIPS_JZ4740_SERIAL_H__
#define __MIPS_JZ4740_SERIAL_H__
struct uart_port;
void jz4740_serial_out(struct uart_port *p, int offset, int value);
#endif