Re: [PATCH v2 04/10] serial: mps2-uart: add MPS2 UART driver

This driver adds support to the UART controller found on ARM MPS2
platform.

Signed-off-by: Vladimir Murzin <redacted>
---
 drivers/tty/serial/Kconfig       |   12 +
 drivers/tty/serial/Makefile      |    1 +
 drivers/tty/serial/mps2-uart.c   |  584 ++++++++++++++++++++++++++++++++++++++
 include/uapi/linux/serial_core.h |    3 +
 4 files changed, 600 insertions(+)
 create mode 100644 drivers/tty/serial/mps2-uart.c

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 39721ec..3a248be 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig

@@ -1450,6 +1450,18 @@ config SERIAL_EFM32_UART
 	  This driver support the USART and UART ports on
 	  Energy Micro's efm32 SoCs.
 
+config SERIAL_MPS2_UART_CONSOLE
+	bool "MPS2 UART console support"
+	depends on SERIAL_MPS2_UART
+	select SERIAL_CORE_CONSOLE
+
+config SERIAL_MPS2_UART
+	bool "MPS2 UART port"
+	depends on ARM || COMPILE_TEST
+	select SERIAL_CORE
+	help
+	  This driver support the UART ports on ARM MPS2.
+
 config SERIAL_EFM32_UART_CONSOLE
 	bool "EFM32 UART/USART console support"
 	depends on SERIAL_EFM32_UART=y

diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index b391c9b..1062503 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile

@@ -91,6 +91,7 @@ obj-$(CONFIG_SERIAL_CONEXANT_DIGICOLOR)	+= digicolor-usart.o
 obj-$(CONFIG_SERIAL_MEN_Z135)	+= men_z135_uart.o
 obj-$(CONFIG_SERIAL_SPRD) += sprd_serial.o
 obj-$(CONFIG_SERIAL_STM32)	+= stm32-usart.o
+obj-$(CONFIG_SERIAL_MPS2_UART)	+= mps2-uart.o
 
 # GPIOLIB helpers for modem control lines
 obj-$(CONFIG_SERIAL_MCTRL_GPIO)	+= serial_mctrl_gpio.o

diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
new file mode 100644
index 0000000..4d113ec
--- /dev/null
+++ b/drivers/tty/serial/mps2-uart.c

@@ -0,0 +1,584 @@
+/*
+ * Copyright (C) 2015 ARM Limited
+ *
+ * Author: Vladimir Murzin <vladimir.murzin-5wv7dgnIgG8@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * TODO: support for SysRq
+ */
+
+#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/console.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/serial_core.h>
+#include <linux/tty_flip.h>
+#include <linux/types.h>
+
+#define SERIAL_NAME "ttyS"