linux-kernel - Re: [PATCH net-next 1/4] dt-bindings: net: dsa: realtek: describe LED usage

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Date: Sun, 10 Mar 2024 19:02:52 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Luiz Angelo Daros de Luca <luizluca@...il.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Alvin Šipraga <alsi@...g-olufsen.dk>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 1/4] dt-bindings: net: dsa: realtek: describe
 LED usage

On Sun, Mar 10, 2024 at 01:51:58AM -0300, Luiz Angelo Daros de Luca wrote:
> Each port can have up to 4 LEDs (3 for current rtl8365mb devices). The
> LED reg property will indicate its LED group.
> +                properties:
> +                  reg:
> +                    description:
> +                      "reg indicates the LED group for this LED"
> +                    enum: [0, 1, 2, 3]

If this identifies the group, what identifies the actual LED? There
are four of them. How do i say LEDs 0 and 1 are unused, 2 and 3 are
wired to LEDs?

It would be much more usual for reg to be the LED number for the
port. And there then be a group property indicating what group the LED
belongs to. However, i'm wondering, is group fixed? Do we actually
need it in DT, or can there just be a table in the driver which maps
port:led to group?

	 Andrew