Hi Michael Walle,
On Fri, 21 Feb 2025 10:14:46 +0100, Michael Walle wrote:
> It appears that pinctrl-single is misused on this SoC to control both
> the mux and the input and output and bias settings. This results in
> non-working pinctrl configurations for GPIOs within the device tree.
>
> This is what happens:
> (1) During startup the pinctrl settings are applied according to the
> device tree. I.e. the pin is configured as output and with
> pull-ups enabled.
> (2) During startup a device driver requests a GPIO.
> (3) pinctrl-single is applying the default GPIO setting according to
> the pinctrl-single,gpio-range property.
>
> [...]
> Maybe one could also switch the pinctrl-single to a pinconf-single node
> which is able to control all the bias settings and restrict
> "pinctrl-single,function-mask" to just the actual function. Not
> sure
I agree, we should probably migrate to pinconf-single bindings in long
term. There is just too much legacy code and tools relying on current
bindings though. Something for look at for next SoC. Thanks for the
patch!
I have applied the following to branch ti-k3-dts-next on [1].
Thank you!
[1/2] arm64: dts: ti: k3-am62p: fix pinctrl settings
commit: 33bab9d84e52188cf73c3573fd7cf3ec0e01d007
[2/2] arm64: dts: ti: k3-j722s: fix pinctrl settings
commit: 06daad327d043c23bc1ab4cdb519f589094b9e98
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent up the chain during
the next merge window (or sooner if it is a relevant bug fix), however if
problems are discovered then the patch may be dropped or reverted.
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[1] https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux.git
--
Vignesh
