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usb: mtu3: enable auto switch from U3 to U2 

inform mac2 to build U2 link automatically after U3 detect
fail without software setting soft_connect.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2016-12-07 15:24:13 +08:00 committed by Greg Kroah-Hartman
parent 918b8ac55b
commit c7d4abbcb1
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/mtu3/mtu3_core.c
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@ -575,6 +575,8 @@ static void mtu3_regs_init(struct mtu3 *mtu)
SW_U1_REQUEST_ENABLE | SW_U2_REQUEST_ENABLE);
/* device responses to u3_exit from host automatically */
mtu3_clrbits(mbase, U3D_LTSSM_CTRL, SOFT_U3_EXIT_EN);
/* automatically build U2 link when U3 detect fail */
mtu3_setbits(mbase, U3D_USB2_TEST_MODE, U2U3_AUTO_SWITCH);
}
mtu3_set_speed(mtu);