Re: [PATCH v10 02/18] counter: Documentation: Add Generic Counter sysfs documentation

[David Lechner]

On 4/8/19 4:55 PM, Pavel Machek wrote:
> pavel@amd:~$ cat /sys/power/state
> freeze mem disk
>
> And we use [] to mark current selection:

I know this is used elsewhere, but I don't think it is a good pattern
to copy. Parsing it from user-space is annoying. Also it breaks the
sysfs rule of "one item per file" since it tells us two things - the
list of possible values _and_ the current active value.

> pavel@amd:~$ cat /sys/class/leds/tpacpi\:\:thinkvantage/trigger
> [none] bluetooth-power rfkill-any rfkill-none kbd-scrolllock
> kbd-numlock kbd-capslock kbd-kanalock kbd-shiftlock kbd-altgrlock
> kbd-ctrllock kbd-altlock kbd-shiftllock kbd-shiftrlock kbd-ctrlllock
> kbd-ctrlrlock AC-online BAT0-charging-or-full BAT0-charging BAT0-full
> BAT0-charging-blink-full-solid rfkill0 phy0rx phy0tx phy0assoc
> phy0radio phy0tpt mmc0 timer heartbeat audio-mute audio-micmute
> rfkill1
>
> Note this only works if you have less than PAGE_SIZE of entries... and
> will never have more.
>
> 									Pavel