USB: omap_udc: sync with OMAP tree

Sync up USB parts of the omap_udc support in mainline with the OMAP tree.
This patch addresses some OMAP2 differences ... there's another, with
respect to the double-buffering issue with PIO-IN in omap_ep_setup()
(which is now out of sync with the comments), but it's not clear right
now how to address that.

From: Tony Lindgren <tony@atomide.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 8 insertions, 1 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 1a72715bce8a..dd4cd5a51370 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 bb54cca4c543..34e9e393f929 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 {