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scotty · 2023-01-15

I have the following DTS file and I have not been able to get the GPIO external interrupt working correctly. I have read this document on interrupt overviews, and tried to enable the EXTI to have control of the GPIOB pin 12. /dts-v1/; #include "stm...

scotty · 2023-01-06

I've tried following the examples given here and here, but it will not work. I just want to enable a pull up resistor in the DTS file. Here is my DTS file. If anyone can please tell me why it's not working I would appreciate it. /dts-v1/; #include ...

scotty · 2023-01-22

I have fixed the issue, and it's rather subtle. My code was iterating through all the GPIOs from 0-100 and I was looking for a change in the IRQ number to indicate that the IRQ could be used. However, none of that seems necessary. When your driver is...

scotty · 2023-01-20

@OlivierK You were knowledgeable on my previous DTS question. Any chance you know why this DTS change isn't being reflected in the EXTI interrupt system?

scotty · 2023-01-12

I understand now. I thought this device tree configuration would be immediately used on boot, but I must first load the LKM for the driver to instantiate these pins. Sorry for the confusion.

scotty · 2023-01-10

@OlivierK While this works for the LED, and indeed the pullup can be activated this way, I was asking how to make the button on the pinctrl work with a bias-pull-up. Please let me know how to configure it this was. Thank you.

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GPIO Interrupt / EXTI setup in device tree

STM32MP1 DTS file pin pull up

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