On Sun, Feb 15, 2026 at 4:40 AM Marc Dietrich [off-list ref] wrote:

Hallo Chen-Yu,

On Sat, 14 Feb 2026, Chen-Yu Tsai wrote:

quoted

On Sat, Feb 14, 2026 at 10:27 PM Marc Dietrich [off-list ref] wrote:

quoted

Hi Dimitry,

On Wed, 11 Feb 2026, Dmitry Torokhov wrote:

quoted

Hi Thierry,

On Fri, Jun 28, 2024 at 05:35:08PM +0200, Thierry Reding wrote:

quoted

From: Thierry Reding <redacted>


On Wed, 26 Jun 2024 21:46:13 -0700, Dmitry Torokhov wrote:

quoted

Complete conversion of the WiFi rfkill device to use device
properties/software nodes by utilizing PROPERTY_ENTRY_GPIO() instead of
a lookup table.

Applied, thanks!

[1/1] ARM: tegra: paz00: use software nodes to describe GPIOs for WiFi rfkill
      commit: 47ac458bb229f8c4864081d173adbcfc55c34880

Do you know by any chance why paz00 does not simply configure rfkill
switch via device tree? The driver (rfkill-gpio) seem to support device
tree...

last time I tried this was rejected because the wifi chip is on the usb
bus and "rfkill" should be a sub-function of this chip [1], but that was
some time ago...

Looking hard the schematics, the wifi chip does not have a gpio input as
first thought. Rather it seems that the first gpio toggles a regulator
which supplies the wifi module (m2 card) with power and the second gpio is
just connected to the wifi LED.

Not sure how to transfer this into dt, but I guess this would be the
better solution.

Then the first GPIO should probably just be described as a fixed regulator
feeding the USB controller that the M.2 module is connected to.

I think that is what rfkill-gpio is for, so the proposal of
Dimitry looks fine, execpt for the reset-gpio, aka LED which is
already included in the dt (but maybe with the wrong gpio).

I did that some years ago and was rejected. It was for SDIO, not USB
though.

Note that if the wireless driver also registers an rfkill device, you
would end up with two rfkill devices in the system, and with slightly
different behavior.

One would just disable the radio portion of the WiFi device, while the
other would cause the WiFi device to disappear.


ChenYu

I will give it a try on real HW and report back.

Thanks!

Marc