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> --- drivers/usb/mtu3/mtu3_plat.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 46551f6d16fd..cdef66141e20 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -200,6 +200,12 @@ 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 is default power-on in fact + * power down device ip, otherwise ip-sleep will fail + */ + mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); } /* ignore the error if the clock does not exist */ -- 2.18.1
