Re: [PATCH v5 1/7] dt-bindings: connector: Add mikrobus-connector

Ayush Singh
2024-08-31T18:11:45Z

>> But here you can have subnodes, no? These could then be just
>> enumerated as usual.
>>
>> &mikrobus_board {
>> mikrobus_gpio: gpio {
>> gpio-controller;
>> #gpio-cells = <1>;
>> };
>>
>> spi {
>> cs-gpios = <&mikrobus_gpio 1>;
>>
>> spi@0 {
>> compatible = "mydevice";
>> reg = <0>;
>> };
>> };
>> };
>>

Hi, I am now working on an approach for mikroBUS based on the apprach
described here: [1]

I am thinking of the gpio-controller approach you seem to have used
here. So I wanted to inquire if there already exists a gpio-controller
driver that can create a proxy controller that forwards stuff to the
underlying actual controller. So something like the following:

&mikrobus_gpio: gpio {

gpio-controller;

#gpio-cells = <2>;

gpios = <&gpio1 0>, <&gpi2 1>;

};

spi {

cs-gpios = <&mikrobus_gpio 1 GPIO_ACTIVE_HIGH>;

};

There does exist gpio0-virtio, but that seems to be for vm context.

[1]:
https://lore.kernel.org/linux-arm-kernel/20240702164403.29067-1-afd@ti.com/

Ayush Singh