From: Paul Burton Date: Fri, 26 Aug 2016 14:17:36 +0000 (+0100) Subject: MIPS: SEAD3: Use generic ns16550a earlycon support X-Git-Tag: v4.14-rc1~2250^2~54 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=53f37d1d306927d21e0256fe6c48fa517d889cf7;p=platform%2Fkernel%2Flinux-rpi.git MIPS: SEAD3: Use generic ns16550a earlycon support Stop selecting SYS_HAS_EARLY_PRINTK & remove the custom support for early output to the ns16550a UARTs, instead relying upon generic ns16550a earlycon support. This reduces the amount of platform code required for SEAD3 without losing any functionality. Signed-off-by: Paul Burton Cc: Jacek Anaszewski Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14049/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 6fba0ef..7ec9ed7 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -514,7 +514,6 @@ config MIPS_SEAD3 select SYS_HAS_CPU_MIPS32_R2 select SYS_HAS_CPU_MIPS32_R6 select SYS_HAS_CPU_MIPS64_R1 - select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN diff --git a/arch/mips/configs/sead3_defconfig b/arch/mips/configs/sead3_defconfig index deb48fb..23cce81 100644 --- a/arch/mips/configs/sead3_defconfig +++ b/arch/mips/configs/sead3_defconfig @@ -15,6 +15,8 @@ CONFIG_PROFILING=y CONFIG_OPROFILE=y CONFIG_MODULES=y # CONFIG_BLK_DEV_BSG is not set +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="earlycon" # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set CONFIG_NET=y CONFIG_PACKET=y diff --git a/arch/mips/mti-sead3/Makefile b/arch/mips/mti-sead3/Makefile index aad67aa..a58b6d9 100644 --- a/arch/mips/mti-sead3/Makefile +++ b/arch/mips/mti-sead3/Makefile @@ -17,5 +17,3 @@ obj-y += sead3-platform.o obj-y += sead3-reset.o obj-y += sead3-setup.o obj-y += sead3-time.o - -obj-$(CONFIG_EARLY_PRINTK) += sead3-console.o diff --git a/arch/mips/mti-sead3/sead3-console.c b/arch/mips/mti-sead3/sead3-console.c deleted file mode 100644 index 031f47d..0000000 --- a/arch/mips/mti-sead3/sead3-console.c +++ /dev/null @@ -1,46 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. - */ -#include -#include -#include -#include - -#define SEAD_UART1_REGS_BASE 0xbf000800 /* ttyS1 = DB9 port */ -#define SEAD_UART0_REGS_BASE 0xbf000900 /* ttyS0 = USB port */ -#define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4)) - -static char console_port = 1; - -static inline unsigned int serial_in(int offset, unsigned int base_addr) -{ - return __raw_readl(PORT(base_addr, offset)) & 0xff; -} - -static inline void serial_out(int offset, int value, unsigned int base_addr) -{ - __raw_writel(value, PORT(base_addr, offset)); -} - -void __init fw_init_early_console(char port) -{ - console_port = port; -} - -int prom_putchar(char c) -{ - unsigned int base_addr; - - base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE; - - while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0) - ; - - serial_out(UART_TX, c, base_addr); - - return 1; -} diff --git a/arch/mips/mti-sead3/sead3-init.c b/arch/mips/mti-sead3/sead3-init.c index e81f5b7..50f3fcb 100644 --- a/arch/mips/mti-sead3/sead3-init.c +++ b/arch/mips/mti-sead3/sead3-init.c @@ -93,12 +93,6 @@ void __init prom_init(void) board_ejtag_handler_setup = mips_ejtag_setup; fw_init_cmdline(); -#ifdef CONFIG_EARLY_PRINTK - if ((strstr(fw_getcmdline(), "console=ttyS0")) != NULL) - fw_init_early_console(0); - else if ((strstr(fw_getcmdline(), "console=ttyS1")) != NULL) - fw_init_early_console(1); -#endif } void __init prom_free_prom_memory(void)