CTUCANFD_MODE
mode = ctucan_read32(priv, CTUCANFD_MODE);
ctucan_write32(priv, CTUCANFD_MODE, mode);
#define CTU_CAN_FD_ENABLED(priv) (!!FIELD_GET(REG_MODE_ENA, ctucan_read32(priv, CTUCANFD_MODE)))
ctucan_write32(priv, CTUCANFD_MODE, REG_MODE_RST);
u32 mode_reg = ctucan_read32(priv, CTUCANFD_MODE);
ctucan_write32(priv, CTUCANFD_MODE, mode_reg);
mode_reg = ctucan_read32(priv, CTUCANFD_MODE);
ctucan_write32(priv, CTUCANFD_MODE, mode_reg);