[V2] usb/mtu3: power down device ip at setup

Hsin-Yi, Wang
2018-11-28T09:29:53Z

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_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