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From: Sergei Shtylyov <>
To: Dejin Zheng <>,,,
Subject: Re: [PATCH v1] usb: dwc3: core: fix a issue about clear connect state
Date: Sun, 18 Oct 2020 20:40:01 +0300
Message-ID: <> (raw)
In-Reply-To: <>


On 10/18/20 4:47 PM, Dejin Zheng wrote:

> According to Synopsys Programming Guide chapter 2.2 Register Resets,
> it cannot reset the DCTL register by set DCTL.CSFTRST for Core Soft Reset,


> if DWC3 controller as a slave device and stay connected with a usb host,
> then, reboot linux, it will fail to reinitialize dwc3 as a slave device

   s/reboot/while rebooting/.

> when the DWC3 controller did not power off. because the connection status
> is incorrect, so we also need clear DCTL.RUN_STOP bit for disable connect
                               ^ to                               ^ ing

> when do core soft reset.
         ^ ing

> Fixes: f59dcab176293b6 ("usb: dwc3: core: improve reset sequence")
> Signed-off-by: Dejin Zheng <>

MBR, Sergei

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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-18 13:47 Dejin Zheng
2020-10-18 17:40 ` Sergei Shtylyov [this message]
2020-10-27  9:12 ` Felipe Balbi

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