13:12 <tambarus> krzk: Hi! Can I change to optional a dt property that's currently marked as mandatory? I'm talking about the dma property in Documentation/devicetree/bindings/spi/samsung,spi.yaml. SPI does not have an internal DMA, it uses DMA channels from a DMA controller that feeds other IPs as well.

13:14 <tambarus> krzk: the driver switches to PIO mode when dmas is not specified in DT, we shall be fine

13:31 <krzk> tambarus: in general property can be made un-required, but I don't know why it was made required in the first place

14:38 <tambarus> krzk: okay, thanks for the hint. I'll study it a bit and come up with a proposal

15:15 <tambarus> krzk: dmas was marked as mandatory because the driver failed to probe if the property was absent. It's not a hardware requirement, it's just that the driver was poorly written. Since the driver was updated to make dmas optional just in 2022, I can't guarantee that older exynos platforms don't need the DMA. I assume they don't, but I can't verify. I'll make it optional just for gs101. Others can

15:15 <tambarus> follow.

15:18 <krzk> tambarus: both approaches work for me