On 4/15/20 11:29 AM, s.achte...@rug.nl wrote:
On 4/4/20 5:21 PM, s.achte...@rug.nl wrote:
Hello list,
Trying to create a device driver for a raspberry pi zero (BCM2835) to control a
gpio and an spi device.
This eventually will be done in a FIQ interrupt handler.
A simplified version of this batradio-driver can be found at:
https://github.com/SietseAchterop/Batradio/blob/master/batradio_module/alloctest.c
I found a working solution. I actually don't know what I am doing but it
works.
Before the call to dma_zalloc_coherent I added:
pdev->dev.coherent_dma_mask = 0xffffffff;
Now it works.
Regards,
Sietse
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