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SubjectRe: [PATCH v2 6/6] leds: netdev trigger: allow setting initial values in device tree
On Thu 2019-03-14 15:06:19, Rasmus Villemoes wrote:
> It can be quite convenient to initialize a netdev-triggered LED with a
> device name and setting the rx,tx,link properties from device tree,
> instead of having to do that in an init script (or udev rule) in
> userspace.
>
> My main motivation for this is to be able to switch away from the
> deprecated CONFIG_CAN_LEDS. The example added to common.txt
> corresponds to switching linux,default-trigger = "can0-rxtx" to
> "netdev" and adding the indicated netdev subnode.
>
> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> ---
> .../devicetree/bindings/leds/common.txt | 11 +++++++
> drivers/leds/trigger/ledtrig-netdev.c | 30 +++++++++++++++++++
> 2 files changed, 41 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
> index 7cb88460a47c..f8078c4cf6f8 100644
> --- a/Documentation/devicetree/bindings/leds/common.txt
> +++ b/Documentation/devicetree/bindings/leds/common.txt
> @@ -43,6 +43,17 @@ Optional properties for child nodes:
> Documentation/ABI/testing/sysfs-class-led-trigger-netdev)
> to reflect the state and activity of a net device.
>
> + The optional child node netdev can be used to
> + configure initial values for the link, rx, tx and
> + device_name properties. For example,
> +
> + netdev {
> + rx;
> + tx;
> + link;
> + device-name = "can0";

Well, NAK, as explained before. Use phandle.

Alternatively, adding comment why CONFIG_CAN_LEDS can not be removed
just yet near the deprecation note would be acceptable.

Pavel

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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