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amlogic/spicc bits per word > 8 #87
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on Dec 23, 2024
SPI transfers with word sizes > 8 bits are not supported correctly. While you can set larger word sizes, only the 8 LSBs are filled with data. I.e., sending out 4 bytes of data as a 32 bit word does not result in a 32 bit word, but in four 32 bit words with 8 bit of data in each.
Seems that cases with word size != 8 is not considered in spicc_hw_xfer().
The TXDATA register is 32bit wide, but always filled with 8 bit data.