[PATCH v5 35/37] MIPS: JZ4740: use Ingenic SoC UART driver
From: Paul Burton
Date: Sun May 24 2015 - 11:30:50 EST
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@xxxxxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
---
Changes in v5: None
Changes in v4: None
Changes in v3:
- Enable the UART driver in qi_lb60_defconfig to preserve its current
behaviour.
Changes in v2: None
arch/mips/Kconfig | 1 -
arch/mips/boot/dts/ingenic/jz4740.dtsi | 22 ++++++++++++++
arch/mips/boot/dts/ingenic/qi_lb60.dts | 4 +++
arch/mips/configs/qi_lb60_defconfig | 1 +
arch/mips/include/asm/mach-jz4740/platform.h | 2 --
arch/mips/jz4740/Makefile | 2 +-
arch/mips/jz4740/board-qi_lb60.c | 2 --
arch/mips/jz4740/platform.c | 45 ----------------------------
arch/mips/jz4740/prom.c | 13 --------
arch/mips/jz4740/serial.c | 33 --------------------
arch/mips/jz4740/serial.h | 23 --------------
11 files changed, 28 insertions(+), 120 deletions(-)
delete mode 100644 arch/mips/jz4740/serial.c
delete mode 100644 arch/mips/jz4740/serial.h
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f07a213..01045fb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -296,7 +296,6 @@ config MACH_INGENIC
select DMA_NONCOHERENT
select IRQ_CPU
select ARCH_REQUIRE_GPIOLIB
- select SYS_HAS_EARLY_PRINTK
select COMMON_CLK
select GENERIC_IRQ_CHIP
select BUILTIN_DTB
diff --git a/arch/mips/boot/dts/ingenic/jz4740.dtsi b/arch/mips/boot/dts/ingenic/jz4740.dtsi
index 9903ab2..c64e01f 100644
--- a/arch/mips/boot/dts/ingenic/jz4740.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4740.dtsi
@@ -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";
+ };
};
diff --git a/arch/mips/boot/dts/ingenic/qi_lb60.dts b/arch/mips/boot/dts/ingenic/qi_lb60.dts
index 106d13c..2414d63 100644
--- a/arch/mips/boot/dts/ingenic/qi_lb60.dts
+++ b/arch/mips/boot/dts/ingenic/qi_lb60.dts
@@ -4,6 +4,10 @@
/ {
compatible = "qi,lb60", "ingenic,jz4740";
+
+ chosen {
+ stdout-path = &uart0;
+ };
};
&ext {
diff --git a/arch/mips/configs/qi_lb60_defconfig b/arch/mips/configs/qi_lb60_defconfig
index 1139b89..d7bb8cc 100644
--- a/arch/mips/configs/qi_lb60_defconfig
+++ b/arch/mips/configs/qi_lb60_defconfig
@@ -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
diff --git a/arch/mips/include/asm/mach-jz4740/platform.h b/arch/mips/include/asm/mach-jz4740/platform.h
index 069b43a..32cfbe6 100644
--- a/arch/mips/include/asm/mach-jz4740/platform.h
+++ b/arch/mips/include/asm/mach-jz4740/platform.h
@@ -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
diff --git a/arch/mips/jz4740/Makefile b/arch/mips/jz4740/Makefile
index 70a9578..89ce401 100644
--- a/arch/mips/jz4740/Makefile
+++ b/arch/mips/jz4740/Makefile
@@ -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
diff --git a/arch/mips/jz4740/board-qi_lb60.c b/arch/mips/jz4740/board-qi_lb60.c
index 21b034c..4e62bf8 100644
--- a/arch/mips/jz4740/board-qi_lb60.c
+++ b/arch/mips/jz4740/board-qi_lb60.c
@@ -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));
diff --git a/arch/mips/jz4740/platform.c b/arch/mips/jz4740/platform.c
index 2a5c7c7..e8a463b 100644
--- a/arch/mips/jz4740/platform.c
+++ b/arch/mips/jz4740/platform.c
@@ -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[] = {
{
diff --git a/arch/mips/jz4740/prom.c b/arch/mips/jz4740/prom.c
index 5a93f38..6984683 100644
--- a/arch/mips/jz4740/prom.c
+++ b/arch/mips/jz4740/prom.c
@@ -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));
-}
diff --git a/arch/mips/jz4740/serial.c b/arch/mips/jz4740/serial.c
deleted file mode 100644
index d23de45..0000000
--- a/arch/mips/jz4740/serial.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2010, Lars-Peter Clausen <lars@xxxxxxxxxx>
- * 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));
-}
diff --git a/arch/mips/jz4740/serial.h b/arch/mips/jz4740/serial.h
deleted file mode 100644
index 8eb715b..0000000
--- a/arch/mips/jz4740/serial.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright (C) 2010, Lars-Peter Clausen <lars@xxxxxxxxxx>
- * 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
--
2.4.1
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