Hi Jones, > > +static int rpc_mfd_probe(struct platform_device *pdev) > > Remove the "mfd" from the nomenclature. okay, will fix. > > > + struct device_node *flash; > > + const struct mfd_cell *cell; > > + struct resource *res; > > + struct rpc_mfd *rpc; > > + void __iomem *base; > > + > > + flash = of_get_next_child(pdev->dev.of_node, NULL); > > + if (!flash) { > > + dev_warn(&pdev->dev, "no flash node found\n"); > > + return -ENODEV; > > + } > > + > > + if (of_device_is_compatible(flash, "jedec,spi-nor")) { > > + cell = &rpc_spi_ctlr; > > + } else if (of_device_is_compatible(flash, "cfi-flash")) { > > + cell = &rpc_hf_ctlr; > > + } else { > > + dev_warn(&pdev->dev, "unknown flash type\n"); > > + return -ENODEV; > > + } > > Are there going to be more children coming? No, just spi-nor or cfi-flash. The operation mode is decided at booting time by HW pin configuration. Can't change spi-nor or cfi-flash mode at run-time. > > If not, I'd argue that this is not an MFD. > umm, agreed. thanks & best regards, Mason CONFIDENTIALITY NOTE: This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation. Macronix International Co., Ltd. ===================================================================== ============================================================================ CONFIDENTIALITY NOTE: This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation. Macronix International Co., Ltd. =====================================================================