OpenLane: Yosys Synthesis Checks Error

[kareefardi]

PnR with OpenLane leads to the following synthesis checks errors:

Warning: Wire EF_SPI_APB.\TXDATA_WIRE [7] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [6] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [5] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [4] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [3] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [2] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [1] is used but has no driver.
Warning: Wire EF_SPI_APB.\TXDATA_WIRE [0] is used but has no driver.