@@ -52,6 +52,16 @@ config USB_GADGET_DWC2_OTG
driver to operate in Peripheral mode. This option requires
USB_GADGET to be enabled.
+if USB_GADGET_DWC2_OTG
+
+config USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
+ bool "DesignWare USB2.0 HS OTG controller 8-bit PHY bus width"
+ help
+ Set the Designware USB2.0 high-speed OTG controller
+ PHY interface width to 8 bits, rather than the default (16 bits).
+
+endif # USB_GADGET_DWC2_OTG
+
config CI_UDC
bool "ChipIdea device controller"
select USB_GADGET_DUALSPEED
@@ -415,7 +415,11 @@ static void reconfig_usbd(struct dwc2_udc *dev)
|0<<7 /* Ulpi DDR sel*/
|0<<6 /* 0: high speed utmi+, 1: full speed serial*/
|0<<4 /* 0: utmi+, 1:ulpi*/
+#ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
+ |0<<3 /* phy i/f 0:8bit, 1:16bit*/
+#else
|1<<3 /* phy i/f 0:8bit, 1:16bit*/
+#endif
|0x7<<0; /* HS/FS Timeout**/
if (dev->pdata->usb_gusbcfg)
Define CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8 to allow the physical interface to be 8-bit (rather than 16-bit). Signed-off-by: Steve Rae <srae@broadcom.com> --- from [1] (line ~124) /* The Kona PHY supports an 8-bit wide UTMI interface */ [...snip...] module_platform_driver(bcm_kona_usb2_driver); MODULE_ALIAS("platform:bcm-kona-usb2"); MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver"); MODULE_LICENSE("GPL v2"); [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/phy/phy-bcm-kona-usb2.c Changes in v4: - split defconfig's into separate patch (per Marek) Changes in v3: - implement Marek's suggestion Changes in v2: - implement as Kconfig drivers/usb/gadget/Kconfig | 10 ++++++++++ drivers/usb/gadget/dwc2_udc_otg.c | 4 ++++ 2 files changed, 14 insertions(+)