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