diff options
| author | Hsin-Yi, Wang <hsinyi@chromium.org> | 2018-11-29 06:16:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-05 12:13:39 +0300 |
| commit | 1e3af5dfd05c53b3dfd367af4c78ebbf60f6fb41 (patch) | |
| tree | 31318dcd207adacbc161cea7a27d9302bbb63b59 /drivers/usb/mtu3/mtu3_plat.c | |
| parent | e86108940e541febf35813402ff29fa6f4a9ac0b (diff) | |
| download | linux-1e3af5dfd05c53b3dfd367af4c78ebbf60f6fb41.tar.xz | |
usb/mtu3: power down device ip at setup
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>
Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/mtu3/mtu3_plat.c')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_plat.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 46551f6d16fd..e086630e41a9 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -200,6 +200,14 @@ 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 may be powered on in firmware/BROM stage before entering + * kernel stage; + * power down device ip, otherwise ip-sleep will fail when working as + * host only mode + */ + mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); } /* ignore the error if the clock does not exist */ |