Hi Greg, It seems that this commit is breaking ehci-mxc build for MX51. USB: ehci tdi : let's tdi_reset set host mode Commit # 65fd42724aee31018b0bb53f4cb04971423be664 >Matthew Garrett (1): > USB: serial: Enable USB autosuspend by default on qcserial > The error is: drivers/usb/host/ehci-mxc.c: In function 'ehci_mxc_drv_probe': drivers/usb/host/ehci-mxc.c:192: error: 'ehci' undeclared (first use in this function) Thanks, Dinh Nguyen ÿô.nÇ·®+%˱é¥wÿº{.nÇ·¥{±þë)íèjg¬±¨¶Ýjÿ¾«þG«é¸¢·¦j:+v¨wèm¶ÿþø®w¥þ࣢·hâÿÙ