[PATCH] usb/mtu3: power down device ip at setup
From: Hsin-Yi, Wang <hidden>
Date: 2018-11-28 06:04:20
Also in:
linux-mediatek, linux-usb, lkml
Subsystem:
mediatek usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Chunfeng Yun, Linus Torvalds, Greg Kroah-Hartman
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 <redacted> --- 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