linux-kernel - [PATCH] usb: dwc2: add USBTrdTim to initial value

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Message-ID: <1474508357-119468-1-git-send-email-lpc.li@hisilicon.com>
Date:   Thu, 22 Sep 2016 09:39:17 +0800
From:   Pengcheng Li <lpc.li@...ilicon.com>
To:     <johnyoun@...opsys.com>
CC:     <gregkh@...uxfoundation.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <xuejiancheng@...ilicon.com>,
        <lidongpo@...ilicon.com>, <caizhiyong@...ilicon.com>,
        Pengcheng Li <lpc.li@...ilicon.com>
Subject: [PATCH] usb: dwc2: add USBTrdTim to initial value

After dwc2_core_reset，register is to the initial value, and the USBTrdTim
vale is 0x5. If hsotg->phyif = GUSBCFG_PHYIF8, after the dwc2_writel,the
value is 0xd.So we need to set the USBTrdTim to 0.

Signed-off-by: Pengcheng Li <lpc.li@...ilicon.com>
---
 drivers/usb/dwc2/gadget.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index af46adf..9e52e4f 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2531,7 +2531,7 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 	/* keep other bits untouched (so e.g. forced modes are not lost) */
 	usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
 	usbcfg &= ~(GUSBCFG_TOUTCAL_MASK | GUSBCFG_PHYIF16 | GUSBCFG_SRPCAP |
-		GUSBCFG_HNPCAP);
+		GUSBCFG_HNPCAP | GUSBCFG_USBTRDTIM_MASK);
 
 	/* set the PLL on, remove the HNP/SRP and set the PHY */
 	val = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5;
@@ -3413,7 +3413,7 @@ static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg)
 	/* keep other bits untouched (so e.g. forced modes are not lost) */
 	usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
 	usbcfg &= ~(GUSBCFG_TOUTCAL_MASK | GUSBCFG_PHYIF16 | GUSBCFG_SRPCAP |
-		GUSBCFG_HNPCAP);
+		GUSBCFG_HNPCAP | GUSBCFG_USBTRDTIM_MASK);
 
 	/* set the PLL on, remove the HNP/SRP and set the PHY */
 	trdtim = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5;
-- 
2.9.3