SPI_PCI_CTRL_REG_OFFSET
regval = readl(spi_bus->reg_base + SPI_PCI_CTRL_REG_OFFSET(0));
writel(regval, spi_bus->reg_base + SPI_PCI_CTRL_REG_OFFSET(0));
SPI_PCI_CTRL_REG_OFFSET(spi_sub_ptr->hw_inst));
spi_ptr->reg_base + SPI_PCI_CTRL_REG_OFFSET(inst));