On Tue, May 15, 2012 at 08:14:13AM -0700, Greg Kroah-Hartman wrote:
> On Tue, May 15, 2012 at 06:10:19AM +0200, Marek Vasut wrote:
> > Add this function so for example USB Host driver can notify
> > the PHY about some event. This is useful for me on i.MX28, where
> > I need to tell the PHY, from the EHCI interrupt handler, to disable
> > disconnection detector (or reenable it).
> >
> > Signed-off-by: Marek Vasut <marex@xxxxxxx>
> > Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> > Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
> > Cc: Felipe Balbi <balbi@xxxxxx>
> > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > Cc: Linux USB <linux-usb@xxxxxxxxxxxxxxx>
> > ---
> > include/linux/usb/otg.h | 12 ++++++++++++
> > 1 file changed, 12 insertions(+)
> >
> > diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
> > index 38ab3f4..4a74618 100644
> > --- a/include/linux/usb/otg.h
> > +++ b/include/linux/usb/otg.h
> > @@ -117,6 +117,9 @@ struct usb_phy {
> > int (*set_suspend)(struct usb_phy *x,
> > int suspend);
> >
> > + /* for host driver to pass data to the PHY */
> > + int (*notify)(struct usb_phy *x,
> > + void *data);
>
> Wow that is vague.
>
> Notify what? Of what? With what? About what?
>
> Ick ick ick.
>
> Please make this specific as to exactly what you are wanting to do, this
> patch is not specific at all. Hint, if you are ever passing in a void *,
> you are probably doing something wrong...
>
how about this one?
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 38ab3f4..705e391 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -43,6 +43,12 @@ enum usb_phy_events {
USB_EVENT_ENUMERATED, /* gadget driver enumerated */
};
+/* define events for usb host or device driver to notify the PHY */
+enum usb_events {
+ USB_EVENT_HCD_CONNECT, /* device connected to the host */
+ USB_EVENT_HCD_DISCONNECT, /* device disconnected to the host */
+};
+
struct usb_phy;
/* for transceivers connected thru an ULPI interface, the user must
@@ -117,6 +123,9 @@ struct usb_phy {
int (*set_suspend)(struct usb_phy *x,
int suspend);
+ /* for host driver to pass data to the PHY */
+ int (*notify)(struct usb_phy *x,
+ enum usb_events ev, void *data);
};
@@ -170,6 +179,15 @@ usb_phy_shutdown(struct usb_phy *x)
x->shutdown(x);
}
+static inline int
+usb_phy_notify(struct usb_phy *x, enum usb_events ev, void *data)
+{
+ if (x->notify)
+ return x->notify(x, ev, data);
+
+ return 0;
+}
+
/* for usb host and peripheral controller drivers */
#ifdef CONFIG_USB_OTG_UTILS
extern struct usb_phy *usb_get_transceiver(void);
Thanks
Richard
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