Bjorn Andersson wrote:
It sounds like you're trying to say that the pins used can be are
muxed as GPIO or MDIO, in the TLMM.
I'm not 100% sure, but I think that's correct. If you don't want to
have normal networking, you could connect those external pins to some
GPIO device (like an LED or whatever), and then configure the pin muxing
for GPIO purposes. But if that's true, it's only true on the FSM9900.
On the QDF2432, those lines are not connected to the TLMM. They are
instead hard-wired to the Emac.
In the downstream kernel this is often seen with the drivers calling
gpio_request() to "reserve" said pins, but all you should do is
described the desired configuration and muxing in the pinctrl node,
reference that from your driver and simply ignore the fact that those
pins could have been used as GPIO pins.
That makes sense, but I think the driver already does that.
https://patchwork.ozlabs.org/patch/561667/
Function emac_probe_resources() has a call to of_get_named_gpio(). And
then emac_mac_up() calls gpio_request(). As far as I can tell, that's it.
I'm guessing that the of_get_named_gpio() call needs to be changed
somehow, but I'm not sure how.
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