OpenTitan Pins:

C2:     en_iftch_i
C1:     fetch_enable_i
C0:     rst_ni
D3:     spi_cs
D2:     spi_sdo0
D1:     spi_sdi0
D0:     spi_sclk

SH1122 Pins:

D5:     RST
D4:     DC
D3:     CS
D1:     SDA
D0:     SCL