Quoting Peter Rosin (2017-07-11 23:45:24)
> On 2017-07-12 03:02, Stephen Boyd wrote:
> > @@ -102,4 +107,7 @@ Example:
> > rx-burst-size-dword = <0x10>;
> > extcon = <0>, <&usb_id>;
> > phy-clkgate-delay-us = <400>;
> > + mux-controls = <&usb_switch>;
> > + mux-control-names = "usb_switch";
> > + usb-switch-states = <0>, <1>;
>
> I don't see the need for usb-switch-states? Just assume states 0/1 and
> if someone later needs some other states, make them add a property that
> overrides the defaults. Just document that 0 is host and 1 is device.
>
Fine by me. Rob H do you agree?
> > diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
> > index 18cb8e46262d..9fd23ecc2da3 100644
> > --- a/drivers/usb/chipidea/host.c
> > +++ b/drivers/usb/chipidea/host.c
> > @@ -25,6 +25,7 @@
> > #include <linux/usb/hcd.h>
> > #include <linux/usb/chipidea.h>
> > #include <linux/regulator/consumer.h>
> > +#include <linux/mux/consumer.h>
> >
> > #include "../host/ehci.h"
> >
> > @@ -123,6 +124,13 @@ static int host_start(struct ci_hdrc *ci)
> > if (usb_disabled())
> > return -ENODEV;
> >
> > + if (!IS_ERR(ci->platdata->usb_switch.mux)) {
> > + ret = mux_control_select(ci->platdata->usb_switch.mux,
> > + ci->platdata->usb_switch.host);
> > + if (ret)
> > + return ret;
> > + }
> > +
>
> You *must* call mux_control_deselect to clean up if there is a failure
> later in host_start. Is that handled in some non-obvious way?
Good catch. Thanks. I'll add in the unwinding on the error path.
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