Messages in this thread | | | Subject | Re: [PATCH v4] usb/mtu3: power down device ip at setup | From | Chunfeng Yun <> | Date | Thu, 29 Nov 2018 14:26:14 +0800 |
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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@chromium.org> > --- > 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@mediatek.com>
Thanks a lot
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