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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>
This commit is contained in:
Hsin-Yi, Wang 2018-11-29 11:16:27 +08:00 committed by Greg Kroah-Hartman
parent e86108940e
commit 1e3af5dfd0
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/mtu3/mtu3_plat.c
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@ -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 */