This is used to avoid the ports status of IPPC being brought in kernel stage, it may cause ports error especially when the xhci controller is a component of dual-role controller.

Reported-by: Yun-Chien Yu yun-chien.yu@mediatek.com Signed-off-by: Chunfeng Yun chunfeng.yun@mediatek.com --- drivers/usb/host/xhci-mtk.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 18b4f55d89..3838a990ec 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -122,11 +122,13 @@ static int xhci_mtk_host_disable(struct mtk_xhci *mtk)

/* power down all u3 ports */ for (i = 0; i < mtk->num_u3ports; i++) - setbits_le32(mtk->ippc + IPPC_U3_CTRL(i), CTRL_U3_PORT_PDN); + setbits_le32(mtk->ippc + IPPC_U3_CTRL(i), + CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);

/* power down all u2 ports */ for (i = 0; i < mtk->num_u2ports; i++) - setbits_le32(mtk->ippc + IPPC_U2_CTRL(i), CTRL_U2_PORT_PDN); + setbits_le32(mtk->ippc + IPPC_U2_CTRL(i), + CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);

/* power down host ip */ setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);