From mboxrd@z Thu Jan 1 00:00:00 1970 From: hsinyi@chromium.org (Hsin-Yi, Wang) Date: Wed, 28 Nov 2018 14:04:12 +0800 Subject: [PATCH] usb/mtu3: power down device ip at setup Message-ID: <20181128060412.630-1-hsinyi@chromium.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- drivers/usb/mtu3/mtu3_host.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c index c871b94f3e6f..d17cf43305db 100644 --- a/drivers/usb/mtu3/mtu3_host.c +++ b/drivers/usb/mtu3/mtu3_host.c @@ -192,9 +192,17 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) static void ssusb_host_setup(struct ssusb_mtk *ssusb) { struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + void __iomem *ibase = ssusb->ippc_base; host_ports_num_get(ssusb); + /* + * device ip is default power-on in fact + * power down device ip, otherwise ip-sleep will fail + */ + if (ssusb->dr_mode == USB_DR_MODE_HOST) + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); + /* * power on host and power on/enable all ports * if support OTG, gadget driver will switch port0 to device mode -- 2.18.1