On Sat, Dec 09, 2017 at 04:45:29PM +0800, Chunfeng Yun wrote: > These patches introduce the SSUSB and SPM glue layer driver which is > used to support usb remote wakeup. Usually the glue layer is put into > a system controller, such as PERICFG module. > The old way to support usb wakeup is put into SSUSB controller drivers, > including xhci-mtk driver and mtu3 driver, but there are some problems: > 1. can't disdinguish the relation between glue layer and SSUSB IP > when SoCs supports multi SSUSB IPs; > 2. duplicated code for wakeup are put into both xhci-mtk and mtu3 > drivers; > 3. the glue layer may vary on different SoCs with SSUSB IP, and will > make SSUSB controller drivers complicated; > In order to resolve these problems, it's useful to make the glue layer > transparent by extracting a seperated driver, meanwhile to reduce the > duplicated code and simplify SSUSB controller drivers. Both the driver and binding look overly complicated to me when it looks like you just have 2 versions of enable/disable functions which modify a single register. The complexity may be justified if this was a common binding and driver, but it is not. You already have a phandle to the system controller. Can't you add cells to it to handle any differences between instances? That and SoC specific compatible strings should be enough to handle differences. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
