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authorJiaxun Yang <jiaxun.yang@flygoat.com>2019-11-07 07:01:17 +0300
committerPaul Burton <paulburton@kernel.org>2019-11-11 21:45:00 +0300
commit574b9a04abfc68c41c3915c2eba2767b78e3e923 (patch)
tree37a8458d925c2592c6eca2b4e9b94dd6bd6c9ff6
parent2a5984360b015929e62c7f77924535dfbf2b2b35 (diff)
downloadlinux-574b9a04abfc68c41c3915c2eba2767b78e3e923.tar.xz
MIPS: Loongson2ef: Convert to early_printk_8250
early_printk.c is doing the same with early_printk_8250. Remove duplicated code. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: linux-mips@vger.kernel.org Cc: chenhe@lemote.com
-rw-r--r--arch/mips/include/asm/mach-loongson2ef/loongson.h1
-rw-r--r--arch/mips/loongson2ef/Kconfig2
-rw-r--r--arch/mips/loongson2ef/common/Makefile1
-rw-r--r--arch/mips/loongson2ef/common/early_printk.c38
-rw-r--r--arch/mips/loongson2ef/common/init.c1
-rw-r--r--arch/mips/loongson2ef/common/uart_base.c2
6 files changed, 4 insertions, 41 deletions
diff --git a/arch/mips/include/asm/mach-loongson2ef/loongson.h b/arch/mips/include/asm/mach-loongson2ef/loongson.h
index 622456539add..5008af0a1a19 100644
--- a/arch/mips/include/asm/mach-loongson2ef/loongson.h
+++ b/arch/mips/include/asm/mach-loongson2ef/loongson.h
@@ -21,7 +21,6 @@ extern void mach_prepare_shutdown(void);
/* environment arguments from bootloader */
extern u32 cpu_clock_freq;
extern u32 memsize, highmemsize;
-extern const struct plat_smp_ops loongson3_smp_ops;
/* loongson-specific command line, env and memory initialization */
extern void __init prom_init_memory(void);
diff --git a/arch/mips/loongson2ef/Kconfig b/arch/mips/loongson2ef/Kconfig
index 66a584a833e5..595dd48e1e4d 100644
--- a/arch/mips/loongson2ef/Kconfig
+++ b/arch/mips/loongson2ef/Kconfig
@@ -23,6 +23,7 @@ config LEMOTE_FULOONG2E
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_HIGHMEM
select SYS_HAS_EARLY_PRINTK
+ select USE_GENERIC_EARLY_PRINTK_8250
select GENERIC_ISA_DMA_SUPPORT_BROKEN
select CPU_HAS_WB
select LOONGSON_MC146818
@@ -52,6 +53,7 @@ config LEMOTE_MACH2F
select ISA
select SYS_HAS_CPU_LOONGSON2F
select SYS_HAS_EARLY_PRINTK
+ select USE_GENERIC_EARLY_PRINTK_8250
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_HIGHMEM
select SYS_SUPPORTS_LITTLE_ENDIAN
diff --git a/arch/mips/loongson2ef/common/Makefile b/arch/mips/loongson2ef/common/Makefile
index 10dd009a20a0..d5ab3e543ea3 100644
--- a/arch/mips/loongson2ef/common/Makefile
+++ b/arch/mips/loongson2ef/common/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_PCI) += pci.o
#
# Serial port support
#
-obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_LOONGSON_UART_BASE) += uart_base.o
obj-$(CONFIG_LOONGSON_MC146818) += rtc.o
diff --git a/arch/mips/loongson2ef/common/early_printk.c b/arch/mips/loongson2ef/common/early_printk.c
deleted file mode 100644
index d90c5e5a0e78..000000000000
--- a/arch/mips/loongson2ef/common/early_printk.c
+++ /dev/null
@@ -1,38 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* early printk support
- *
- * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
- * Copyright (c) 2009 Lemote Inc.
- * Author: Wu Zhangjin, wuzhangjin@gmail.com
- */
-#include <linux/serial_reg.h>
-#include <asm/setup.h>
-
-#include <loongson.h>
-
-#define PORT(base, offset) (u8 *)(base + offset)
-
-static inline unsigned int serial_in(unsigned char *base, int offset)
-{
- return readb(PORT(base, offset));
-}
-
-static inline void serial_out(unsigned char *base, int offset, int value)
-{
- writeb(value, PORT(base, offset));
-}
-
-void prom_putchar(char c)
-{
- int timeout;
- unsigned char *uart_base;
-
- uart_base = (unsigned char *)_loongson_uart_base;
- timeout = 1024;
-
- while (((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0) &&
- (timeout-- > 0))
- ;
-
- serial_out(uart_base, UART_TX, c);
-}
diff --git a/arch/mips/loongson2ef/common/init.c b/arch/mips/loongson2ef/common/init.c
index dab3ffda8b14..45512178be77 100644
--- a/arch/mips/loongson2ef/common/init.c
+++ b/arch/mips/loongson2ef/common/init.c
@@ -44,7 +44,6 @@ void __init prom_init(void)
/*init the uart base address */
prom_init_uart_base();
- register_smp_ops(&loongson3_smp_ops);
board_nmi_handler_setup = mips_nmi_setup;
}
diff --git a/arch/mips/loongson2ef/common/uart_base.c b/arch/mips/loongson2ef/common/uart_base.c
index bbfe1095a843..522bea6ad7b0 100644
--- a/arch/mips/loongson2ef/common/uart_base.c
+++ b/arch/mips/loongson2ef/common/uart_base.c
@@ -6,6 +6,7 @@
#include <linux/export.h>
#include <asm/bootinfo.h>
+#include <asm/setup.h>
#include <loongson.h>
@@ -38,4 +39,5 @@ void prom_init_loongson_uart_base(void)
}
_loongson_uart_base = TO_UNCAC(loongson_uart_base);
+ setup_8250_early_printk_port(_loongson_uart_base, 0, 1024);
}