Subject: Re: [PATCH 5/8] rfkill: Remove obsolete "state" sysfs interface

From: Johannes Berg <[email-masked]>
Date: Tue, 19 Jan 2016 21:15:05 +0100

On Tue, 2016-01-19 at 10:42 -0500, João Paulo Rechi Vita wrote:
> This was schedule to be removed in 2014 by:

> -For details to this subsystem look at Documentation/rfkill.txt.
> -
> -What:		/sys/class/rfkill/rfkill[0-9]+/state
> -Date:		09-Jul-2007
> -KernelVersion	v2.6.22
> -Contact:	[email-masked]
> -Description: 	Current state of the transmitter.
> -		This file is deprecated and scheduled to be removed
> in 2014,
> -		because its not possible to express the 'soft and
> hard block'
> -		state of the rfkill driver.
> -Values: 	A numeric value.
> -		0: RFKILL_STATE_SOFT_BLOCKED
> -			transmitter is turned off by software
> -		1: RFKILL_STATE_UNBLOCKED
> -			transmitter is (potentially) active
> -		2: RFKILL_STATE_HARD_BLOCKED
> -			transmitter is forced off by something
> outside of
> -			the driver's control.

I suspect that nevertheless, we can't just remove it - Googling around
shows quite a bit of (e.g. Android) code using it.

johannes