Commit 673a8c4f authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Thomas Bogendoerfer
Browse files

Documentation: ABI: Add /sys/firmware/lefi/boardinfo description for Loongson64 



Add a description for /sys/firmware/lefi/boardinfo on the Loongson
platform.

Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent 6c1bfbd9

Documentation/ABI/testing/sysfs-firmware-lefi-boardinfo

0 → 100644
+35 −0
Original line number Diff line number Diff line 
What:		/sys/firmware/lefi/boardinfo

Date:		October 2020

Contact:	Tiezhu Yang <yangtiezhu@loongson.cn>

Description:

		Get mainboard and BIOS info easily on the Loongson platform,

		this is useful to point out the current used mainboard type

		and BIOS version when there exists problems related with

		hardware or firmware.



		The related structures are already defined in the interface

		specification about firmware and kernel which are common

		requirement and specific for Loongson64, so only add a new

		boardinfo.c file in arch/mips/loongson64.



		For example:



		[loongson@linux ~]$ cat /sys/firmware/lefi/boardinfo

		Board Info

		Manufacturer            : LEMOTE

		Board Name              : LEMOTE-LS3A4000-7A1000-1w-V01-pc

		Family                  : LOONGSON3



		BIOS Info

		Vendor                  : Kunlun

		Version                 : Kunlun-A1901-V4.1.3-20200414093938

		ROM Size                : 4 KB

		Release Date            : 2020-04-14



		By the way, using dmidecode command can get the similar info if there

		exists SMBIOS in firmware, but the fact is that there is no SMBIOS on

		some machines, we can see nothing when execute dmidecode, like this:



		[root@linux loongson]# dmidecode

		# dmidecode 2.12

		# No SMBIOS nor DMI entry point found, sorry.