netdev - Re: [PATCH RESUBMIT] leds: trigger: netdev: add core support for hw not supporting fallback to LED sw control

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Message-ID: <7b6cf0fb-4c77-4088-b87b-5649cfaa697e@gmail.com>
Date: Sun, 17 Dec 2023 20:16:11 +0100
From: Heiner Kallweit <hkallweit1@...il.com>
To: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>
Cc: "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
 Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH RESUBMIT] leds: trigger: netdev: add core support for hw
 not supporting fallback to LED sw control

On 17.12.2023 19:46, Heiner Kallweit wrote:
> If hw doesn't support sw control of the LED and we switch to a mode
> not supported by hw, currently we get lots of errors because neither
> brigthness_set() nor brithness_set_blocking() is set.
> Deal with this by not falling back to sw control, and return
> -EOPNOTSUPP to the user. Note that we still store the new mode.
> This is needed in case an intermediate unsupported mode is necessary
> to switch from one supported mode to another.
> 
> Add a comment explaining how a driver for such hw is supposed to behave.
> 
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
> ---

For whatever reason this patch (original version and resubmit) doesn't
show up on linux-leds patchwork. In netdev patchwork it's visible.