Subject: Re: [PATCH] net: pse-pd: add LED trigger support

From: Carlo Szelinsky <[email-masked]>
Date: Sun, 15 Mar 2026 22:12:22 +0100

Hi Oleksij,

Thanks for your kind and quick feedback. I appreciate the time you invested on the weekend :-)

I will look into your suggestion and try to work on it... 

Regarding your question: It is a simple POE chip (hs104) that is integrated in different cheap realtek managed switches.
It communicates only via i2c with the host and does not have any other GPIP/IRQ functionality. The problem is that the LEDs are controlled via a different (MFD) chip that communicates via i2c as well. We wanted to uncouple this as much as possible to keep things clean.

More information you find here:
https://github.com/openwrt/openwrt/pull/22245 [hs104 driver]
https://forum.openwrt.org/t/support-poe-on-hasivo-devices-s1100wp-8gt-se/244817 [discussion]
https://github.com/openwrt/openwrt/pull/21578 [MFD LED controller]

Side note: We are working hard on supporting PSE-PD for openwrt (backports to 6.12, luci, netifd support) and we plan to port other old drivers.

Do you think this simple driver for the hs104 (openwrt github PR) could get merged to mainline kernel?

best,
Carlo