dw_spi_add_controller
EXPORT_SYMBOL_NS_GPL(dw_spi_add_controller, "SPI_DW_CORE");
ret = dw_spi_add_controller(&pdev->dev, dws);
ret = dw_spi_add_controller(&pdev->dev, dws);
extern int dw_spi_add_controller(struct device *dev, struct dw_spi *dws);