hi Hsin-Yi, On Thu, 2018-11-29 at 11:16 +0800, Hsin-Yi, Wang wrote: > Originally, when dr_mode is USB_DR_MODE_HOST, it didn't power down device ip, > so host ip sleep will fail at ssusb_host_disable. > > Power down device ip at ssusb_host_setup. > > Signed-off-by: Hsin-Yi, Wang <hsinyi@xxxxxxxxxxxx> > --- > ChangeLog: > V3->V4: > *update comment > --- > drivers/usb/mtu3/mtu3_plat.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c > index 46551f6d16fd..e086630e41a9 100644 > --- a/drivers/usb/mtu3/mtu3_plat.c > +++ b/drivers/usb/mtu3/mtu3_plat.c > @@ -200,6 +200,14 @@ static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb) > mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); > udelay(1); > mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); > + > + /* > + * device ip may be powered on in firmware/BROM stage before entering > + * kernel stage; > + * power down device ip, otherwise ip-sleep will fail when working as > + * host only mode > + */ > + mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); > } > > /* ignore the error if the clock does not exist */ Acked-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> Thanks a lot
