Jeff Epler 2b64318a57 Update all implementations of common_hal_busio_spi_read to honor write_value
(nrf, rp2040, and cxd56)

.. as well as a misleading comment that said that read always output
zeros.

Closes: #3447
2021-08-18 10:20:40 -05:00
..
2021-03-15 19:27:36 +05:30
2021-03-15 19:27:36 +05:30
2021-07-01 12:49:11 -07:00