MIPS: BCM47XX: add EARLY_PRINTK_8250 support (e1ccbb65) · Commits · 戴 / test

The BCM47xx SoCs have a 8250 serial compatible console at address 0x18000300 and an other at 0x18000400. On most devices 0x18000300 is wired to some pins on the board, we should use that. This is the smae for the AI (bcma) and the SB (ssb) bus, this is some offset on the chip common core. Signed-off-by:

Hauke Mehrtens <hauke@hauke-m.de> Tested-by:

Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by:

John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/5889/

arch/mips/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -120,6 +120,8 @@ config BCM47XX
		select NO_EXCEPT_FILL
		select SYS_SUPPORTS_32BIT_KERNEL
		select SYS_SUPPORTS_LITTLE_ENDIAN
		select SYS_HAS_EARLY_PRINTK
		select EARLY_PRINTK_8250 if EARLY_PRINTK
		help
		Support for BCM47XX based boards

arch/mips/bcm47xx/prom.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -28,6 +28,8 @@
		#include <linux/types.h>
		#include <linux/kernel.h>
		#include <linux/spinlock.h>
		#include <linux/ssb/ssb_driver_chipcommon.h>
		#include <linux/ssb/ssb_regs.h>
		#include <linux/smp.h>
		#include <asm/bootinfo.h>
		#include <bcm47xx.h>
		@@ -94,9 +96,16 @@ static __init void prom_init_mem(void)
		add_memory_region(0, mem, BOOT_MEM_RAM);
		}

		/*
		* This is the first serial on the chip common core, it is at this position
		* for sb (ssb) and ai (bcma) bus.
		*/
		#define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + SSB_CHIPCO_UART0_DATA)

		void __init prom_init(void)
		{
		prom_init_mem();
		setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);
		}

		void __init prom_free_prom_memory(void)

Admin message