linux-kernel - Re: [PATCH 2/2] leds: trigger: ledtrig-tty: add additional modes

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Message-ID: <20230214101119.em547qt57swzylae@pengutronix.de>
Date:   Tue, 14 Feb 2023 11:11:19 +0100
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Florian Eckert <fe@....tdt.de>
Cc:     gregkh@...uxfoundation.org, jirislaby@...nel.org, pavel@....cz,
        lee@...nel.org, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org, Eckert.Florian@...glemail.com
Subject: Re: [PATCH 2/2] leds: trigger: ledtrig-tty: add additional modes

On Mon, Feb 13, 2023 at 03:06:38PM +0100, Florian Eckert wrote:
> Add additional modes to trigger the selected LED.
> The following modes are supported:
> 
> TD/RD:	Flash LED on data transmission (default)
> CTS:	DCE Ready to accept data from the DTE.
> DSR:	DCE is ready to receive and send data.
> CAR:	DCE is receiving a carrier from a remote DTE.
> RNG:	DCE has detected an incoming ring signal.
> 
> The mode can be changed for example with the following command:
> echo "CTS" /sys/class/leds/<led>/mode

I wonder if the abstraction is better be done such that you can also
configure the mode to trigger on (for example) TD and RNG. Then you'd
need one property per signal and then something like the following would
be possible:

	p=/sys/class/leds/<led>
	echo 1 > $p/tx
	echo 0 > $p/rx
	echo 1 > $p/rng

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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