diff options
| author |   Hsin-Yi, Wang <hsinyi@chromium.org> | 2018-11-29 11:16:27 +0800 |
|---|---|---|
| committer |   Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-12-05 11:12:02 +0200 |
| commit | 36b25b69c2c13ebe3d6f80c11de537cb7d1c43f0 (patch) | |
| tree | bdf5a8e769ddc49e0a1e672aa621806f780663ef /drivers/usb/mtu3 | |
| parent | usb: dwc2: Disable power down feature on Samsung SoCs (diff) | |
| download | linux-dev-36b25b69c2c13ebe3d6f80c11de537cb7d1c43f0.tar.xz linux-dev-36b25b69c2c13ebe3d6f80c11de537cb7d1c43f0.zip | |
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.
Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Hsin-Yi, Wang <hsinyi@chromium.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/mtu3')
| -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 */ |