[PATCH 09/10] soc: fujitsu: hwb: Add sysfs entry

[Arnd Bergmann]

On Fri, Jan 8, 2021 at 11:52 AM Misono Tomohiro
<misono.tomohiro at jp.fujitsu.com> wrote:
>
> This adds sysfs entry per CMG to show running barrier driver status
> for debugging user application. The following entries will be created:
>
> /sys/class/misc/fujitsu_hwb
>  |- hwinfo ... number of CMG/BB/BW/pe_per_cmg on running system
>  |- CMG0
>      |- core_map      ... cpuid belonging to this CMG
>      |- used_bb_bmap  ... bitmap of currently allocated BB
>      |- used_bw_bmap  ... bitmap of currently allocated BW
>      |- init_sync_bb0 ... current value of INIT_SYNC register 0
>      |- init_sync_bb1 ... current value of INIT_SYNC register 1
>      ...
>  |- CMG1
>   ...

If this is meant as a stable interface, it should be documented in
Documentation/ABI/

However, if it's purely for debugging and may not get maintained
forever, you might want to use debugfs instead.

      Arnd