From: Hsin-Yi, Wang Date: Thu, 29 Nov 2018 03:16:27 +0000 (+0800) Subject: usb/mtu3: power down device ip at setup X-Git-Tag: v5.0-rc1~99^2~16^2~17 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=36b25b69c2c13ebe3d6f80c11de537cb7d1c43f0;p=linux.git 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 Signed-off-by: Hsin-Yi, Wang Signed-off-by: Felipe Balbi --- 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 */