linux-kernel - Re: [PATCH v2 10/17] leds: leds-nuc: Add support to blink behavior for NUC8/10

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Message-ID: <20210519120915.40b4da10@coco.lan>
Date:   Wed, 19 May 2021 12:09:15 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Marek Behun <marek.behun@....cz>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Pavel Machek <pavel@....cz>, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org
Subject: Re: [PATCH v2 10/17] leds: leds-nuc: Add support to blink behavior
 for NUC8/10

Em Wed, 19 May 2021 09:58:50 +0200
Marek Behun <marek.behun@....cz> escreveu:

> This should be implemented via the blink trigger or hw_pattern, I think.
> Have you looked at these?

The blink trigger and hw_pattern are software implementations for blink.

This is not the case on NUC leds, as:

1. It is the hardware/firmware that triggers the blink, not Linux;
2. It blinks even when Linux in suspend/hibernate mode.

In a matter of fact, the default usage of blink is to indicate that the
machine is suspended.

Thanks,
Mauro