Commit 1e3af5df authored by Hsin-Yi, Wang's avatar Hsin-Yi, Wang Committed by Greg Kroah-Hartman
Browse files

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: default avatarHsin-Yi, Wang <hsinyi@chromium.org>
Acked-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e8610894

drivers/usb/mtu3/mtu3_plat.c

+8 −0
Original line number Diff line number Diff line
@@ -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 */

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