diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 1a72715bce8a4a6a63fe891c091b98432c94c093..dd4cd5a5137087a31827f11a5932781b6ba8637b 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -190,7 +190,7 @@ config USB_LH7A40X
 config USB_GADGET_OMAP
 	boolean "OMAP USB Device Controller"
 	depends on ARCH_OMAP
-	select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
+	select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3 || MACH_OMAP_H4_OTG
 	help
 	   Many Texas Instruments OMAP processors have flexible full
 	   speed USB device controllers, with support for up to 30
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index bb54cca4c54381736ead413cec0e3747e4af9b78..34e9e393f929b5b35b7710d5065ab30fbe25595e 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -2313,6 +2313,13 @@ static int proc_otg_show(struct seq_file *s)
 
 	tmp = omap_readl(OTG_REV);
 	if (cpu_is_omap24xx()) {
+		/*
+		 * REVISIT: Not clear how this works on OMAP2.  trans
+		 * is ANDed to produce bits 7 and 8, which might make
+		 * sense for USB_TRANSCEIVER_CTRL on OMAP1,
+		 * but with CONTROL_DEVCONF, these bits have something to
+		 * do with the frame adjustment counter and McBSP2.
+		 */
 		ctrl_name = "control_devconf";
 		trans = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 	} else {