timeouts and must busy-wait any trailing bytes.
The "pxa2xx_spi_chip.enable_loopback" field is used to place the SSP porting
into internal loopback mode. In this mode the SSP controller internally
timeouts and must busy-wait any trailing bytes.
The "pxa2xx_spi_chip.enable_loopback" field is used to place the SSP porting
into internal loopback mode. In this mode the SSP controller internally