C_CAN_FUNCTION_REG
[C_CAN_FUNCTION_REG] = 0x18,
while (priv->read_reg32(priv, C_CAN_FUNCTION_REG) & mask)
ctrl = priv->read_reg32(priv, C_CAN_FUNCTION_REG);
priv->write_reg32(priv, C_CAN_FUNCTION_REG, ctrl);
priv->write_reg32(priv, C_CAN_FUNCTION_REG, ctrl);