Hi Carlo,

On Sun, Mar 15, 2026 at 10:12:22PM +0100, Carlo Szelinsky wrote:

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]

I would add regmap_range , otherwise regmap damp will try to access not
existing registers.

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]

I guess, here we will have some discussion on the devicetree binding :)

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.

Very nice!

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

Sure!

Best Regards,
Oleksij
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