From 851ce932242d5a79bef8fe625fce37cc2f27033e Mon Sep 17 00:00:00 2001 From: Li Jun Date: Fri, 16 Oct 2015 13:53:20 +0800 Subject: [PATCH] usb: chipidea: otg: don't wait vbus drops below BSV when starts host 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. Signed-off-by: Li Jun Signed-off-by: Peter Chen --- 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 ab4bd0c2d4ef..45f86da1d6d3 100644 --- a/drivers/usb/chipidea/otg.c +++ b/drivers/usb/chipidea/otg.c @@ -114,9 +114,12 @@ 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); } } -- 2.39.5