On Fri, Oct 16, 2015 at 01:53:20PM +0800, Li Jun wrote: > Some HW design may use ID pin state to control vbus for otg port, > so before host role start, the vbus is already turned on, in this > case, we do not need wait vbus dropping below BSV. > Yes, only gadget need to consider vbus. > Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx> > --- > drivers/usb/chipidea/otg.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c > index ad6c87a..3169c51 100644 > --- a/drivers/usb/chipidea/otg.c > +++ b/drivers/usb/chipidea/otg.c > @@ -77,9 +77,12 @@ static void ci_handle_id_switch(struct ci_hdrc *ci) > ci_role(ci)->name, ci->roles[role]->name); > > ci_role_stop(ci); > - /* wait vbus lower than OTGSC_BSV */ > - hw_wait_reg(ci, OP_OTGSC, OTGSC_BSV, 0, > - CI_VBUS_STABLE_TIMEOUT_MS); > + > + if (role == CI_ROLE_GADGET) > + /* wait vbus lower than OTGSC_BSV */ > + hw_wait_reg(ci, OP_OTGSC, OTGSC_BSV, 0, > + CI_VBUS_STABLE_TIMEOUT_MS); > + > ci_role_start(ci, role); > } > } > -- > 1.7.9.5 > -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
