[PATCH] usb/mtu3: power down device ip at setup

Hsin-Yi, Wang
2018-11-28T06:04:12Z

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>
---
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