staging: dwc2: add TODO file

Add TODO file for DWC2 driver

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/dwc2/TODO b/drivers/staging/dwc2/TODO
new file mode 100644 (file)
index 0000000..282470d
--- /dev/null
+++ b/drivers/staging/dwc2/TODO
@@ -0,0 +1,33 @@
+TODO:
+       - Dan Carpenter would like to see some cleanups to the microframe
+         scheduler code:
+         http://www.mail-archive.com/linux-usb@vger.kernel.org/msg26650.html
+
+       - Should merge the NAK holdoff patch from Raspberry Pi
+         (http://marc.info/?l=linux-usb&m=137625067103833). But as it stands
+         that patch is incomplete, it needs more investigation to see if it
+         can be made to work for non-Raspberry Pi platforms that lack the
+         special FIQ interrupt that the Pi has. Without this patch, the driver
+         has a high interrupt rate (8K/sec).
+
+       - The Raspberry Pi platform needs to have support for its FIQ interrupt
+         added, to get the same level of functionality as the downstream
+         driver. The raspberrypi.org developers have indicated they are
+         willing to help with that.
+
+       - Some of the default driver parameters (see 'struct dwc2_core_params'
+         in core.h) won't work for many platforms. So DT attributes will need
+         to be added for some of these. But that can be done as-needed as new
+         platforms are added.
+
+       - Eventually the driver should be merged with the s3c-hsotg peripheral
+         mode driver, so that both modes of operation can be supported with a
+         single driver. But I think that can wait till after the driver has
+         been moved to mainline.
+
+       - After that, OTG support can be added. I'm not sure how much demand
+         there is for that, though, so I have that as a low priority.
+
+Please send any patches for this driver to Paul Zimmerman <paulz@synopsys.com>
+and Greg Kroah-Hartman <gregkh@linuxfoundation.org>. And please CC linux-usb
+<linux-usb@vger.kernel.org> too.