On Mon, Jan 20, 2025 at 10:02:46AM +0100, Marek Vasut wrote:

In case a PHY supports only one LED in total, like ADIN1300, and this LED
is described in DT, it is currently necessary to include unit address in
the LED node name and the address-cells have to be set to 1:

leds {
  #address-cells = <1>;
  ...
  led@0 {
    reg = <0>;
    ...
  };
};

For a single LED PHY, this should not be necessary and plain 'led' node
without unit should be acceptable as well:

leds {
  ...
  led {
    ...
  };
};

So how do other subsystems handle this? SPI with only a single chip
select line? Standalone LED controllers with a single LED? A PWM with
a single output?

 drivers/net/phy/phy_device.c | 15 +++++++++++++--

What about the device tree binding? Does it already have the reg
property as optional?

	Andrew