Re: [PATCH 1/2] ARM: OMAP2+: Fix MUSB ifdefs for platform init code

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Felipe Balbi <balbi@xxxxxx> [120622 03:22]:
> On Wed, Jun 13, 2012 at 03:15:06AM -0700, Tony Lindgren wrote:
> > Commit 62285963 (usb: musb: drop a gigantic amount of ifdeferry)
> > got rid of a bunch of ifdefs in the MUSB code. Looks like the
> > platform init code is still using these dropped defines though,
> > which in many cases results the board defaulting always to host
> > mode.
> > 
> > Currently the situation is that USB_MUSB_HDRC is the main
> > Kconfig option with additional USB_GADGET_MUSB_HDRC so only
> > these two should be used to select between host and OTG mode.
> > 
> > Fix the situation for omaps. The following users should fix the
> > platform init code in a similar way:
> > 
> > Dropped Kconfig option          Current users
> > 
> > USB_MUSB_OTG                    blackfin, davinci, not in Kconfigs
> > USB_MUSB_PERIPHERAL             davinci, not in Kconfigs
> > USB_MUSB_HOST                   davinci, not in Kconfigs
> > USB_MUSB_HDRC_HCD               blackfin, not in Kconfigs
> > USB_MUSB_OTG                    blackfin, not in Kconfigs
> > 
> > Cc: Mike Frysinger <vapier@xxxxxxxxxx>
> > Cc: Sekhar Nori <nsekhar@xxxxxx>
> > Cc: linux-usb@xxxxxxxxxxxxxxx
> > Cc: Felipe Balbi <balbi@xxxxxx>
> > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> 
> Looks ok, though I would stick to things boards are wired to do. e.g.:
> 
> all development boards are wired for OTG (with a few exceptions),
> n800 is peripheral only
> n810 is OTG
> 
> and so on. That way you remove all the clutter.

FYI, these got already merged last week as fixes because of the
broken Kconfig options.

What you're suggesting sounds like a good follow-up patch to improve
things, although I suggest that we remove CONFIG_USB_GADGET_MUSB_HDRC
ifdef else from board-*.c files, and always set host = MUSB_OTG.

For example, both n800 and n810 are wired up the same way except for
the mini-B vs mini-AB connector. The connector alone should be enough
to keep n800 as peripheral unless somebody specifically wants to force
it into host mode by using a non-standard cable or the debug options.

AFAIK, this same logic should apply to all the devices, or do you
see issues with it?

Regards,

Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux