This patch adds platform device support to the existing 'amd5536udc' driver. The UDC is based on Synopsys Designware core USB (2.0) Device controller IP. The driver so far supports UDCs that are a part of AMD southbridge and is connected through PCI bus. The same driver can be used with UDCs that are integrated into SoCs like Broadcom's Northstar2/Cygnus platforms by adding platform device suooprt. This patch contains all the changes that were required to get the driver functional on Broadcom's Northstar2 platform. This is a request for comments from maintainers/others regarding approach on whether to have 2 different drivers (one each for AMD and Broadcom) with a common library (3 files in total), or have a single driver like it's done in this patch and have the driver filename changed to some common name based on ther underlying IP, like snps_udc.c. Below are the main changes done: 1. Added OF based platform device registration -- so that the driver gets probed based on the device tree entry. Like wise, remove routine and platform PM ops are supported. 2. Modified debug prints to be compatible with both pci and platform devices. 3. Added members to 'struct udc' in header file for extcon and phy support. This is required if the UDC is connected to a Dual Role Device Phy where the Phy can be configured to be in Device mode or Host mode based on the type of external cable that is connected to the port. 4. Added checks in udc connect/disconnect routines so as to return if the routine is already called. 5. Modified the arguments passed to dma_pool_create routine -- which expects struct device, whereas NULL is passed in the existing version. 6. Kconfig changes are done so that the driver now depends on either of CONFIG_OF or CONFIG_PCI. More description about the Synopsys IP is provided. Raviteja Garimella (1): Changes to support the driver for platform device registration drivers/usb/gadget/udc/Kconfig | 6 +- drivers/usb/gadget/udc/amd5536udc.c | 397 +++++++++++++++++++++++++++++++++--- drivers/usb/gadget/udc/amd5536udc.h | 17 +- 3 files changed, 387 insertions(+), 33 deletions(-) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
