From: chunfeng.yun@mediatek.com (Chunfeng Yun)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] usb: mtu3: enable auto switch from U3 to U2
Date: Wed, 7 Dec 2016 15:24:13 +0800 [thread overview]
Message-ID: <1481095453-23497-1-git-send-email-chunfeng.yun@mediatek.com> (raw)
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>
---
drivers/usb/mtu3/mtu3_core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index af3e531..ca05021 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -568,6 +568,8 @@ 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);
--
1.7.9.5
reply other threads:[~2016-12-07 7:24 UTC|newest]
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