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    SubjectRE: [PATCH v3 2/5] usb: musb: twl: use mailbox API to send VBUS or ID events
    Hi Kishon,

    >-----Original Message-----
    >Sent: Tuesday, July 03, 2012 10:48 PM
    >To: Matcovschi, Oleg
    >Cc:;;;; >Balbi, Felipe
    >Subject: Re: [PATCH v3 2/5] usb: musb: twl: use mailbox API to send VBUS or ID events

    >Hi Oleg,

    >On Tue, Jul 3, 2012 at 11:09 PM, Matcovschi, Oleg <> wrote:
    >>>[] on behalf of ABRAHAM, KISHON VIJAY
    >>>Sent: Friday, June 22, 2012 5:10 AM
    >>>; Balbi, Felipe
    >>>Subject: [PATCH v3 2/5] usb: musb: twl: use mailbox API to send VBUS
    >>>or ID events
    >>>The atomic notifier from twl4030/twl6030 to notifiy VBUS and ID
    >>>events, is replaced by a direct call to omap musb blue.
    >>>Signed-off-by: Kishon Vijay Abraham I <>
    >>> drivers/usb/musb/omap2430.c   |   94
    >>> drivers/usb/otg/twl4030-usb.c |   46 ++++++++++----------
    >>>drivers/usb/otg/twl6030-usb.c |   47 +++++++++-----------
    >>>include/linux/usb/musb-omap.h |   30 +++++++++++++
    >>> 4 files changed, 133 insertions(+), 84 deletions(-) create mode
    >>>100644 include/linux/usb/musb-omap.h
    >> .....
    >> +enum omap_musb_vbus_id_status {
    >> +       OMAP_MUSB_UNKNOWN = 0,
    >> +       OMAP_MUSB_ID_GROUND,
    >> +       OMAP_MUSB_ID_FLOAT,
    >> +       OMAP_MUSB_VBUS_VALID,
    >> +       OMAP_MUSB_VBUS_OFF,
    >> +};
    >> +
    >> Why did you choose to introduce OMAP_MUSB specific VBUS, ID events?
    >> IMHO, it makes more sense to introduce mailbox functionality only without extra translation layer.
    >> Same mailbox glue layer could be used for other PHY drivers, not just twl.

    >We've decided to make twl as a comparator driver since we have a separate phy driver (not yet merged). Hence we dint >want twl to use usb_phy specific events. So if you have other PHY drivers, you can still use the OMAP_MUSB specific >events.

    In other words: you are proposing to have 2 flavors of other phy drivers(OMAP and not-OMAP platform specific)...
    Do you think it is necessary?
    Could you please provide full description of your original problem?

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