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* fpga: x400: Add SPI Controller Info registerJavier Valenzuela2022-03-041-0/+12
| | | | | | Include a register that contains SPI controller information. Currently, it only provides the number of slaves addressable by the SPI engine.
* fpga: x400: Adjust SPI engine strobes alignmentJavier Valenzuela2022-03-041-5/+10
| | | | | | Modify behavior of clock crossing between radio_clk and radio_clk_2x. This ensures strobe signals are always asserted for a single radio_clk_2x cycle and when radio_clk is low.
* fpga: x400: Add SPI bus support for GPIO portsJavier Valenzuela2022-01-251-0/+534