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From: Fabio Estevam <festevam@gmail.com>
To: Jun Li <jun.li@nxp.com>
Cc: "bjorn@mork.no" <bjorn@mork.no>,
	Peter Chen <peter.chen@kernel.org>, Marek Vasut <marex@denx.de>,
	netdev <netdev@vger.kernel.org>,
	USB list <linux-usb@vger.kernel.org>,
	Alexander Stein <alexander.stein@ew.tq-group.com>,
	Schrempf Frieder <frieder.schrempf@kontron.de>
Subject: Re: imx7: USB modem reset causes modem to not re-connect
Date: Tue, 13 Dec 2022 06:33:29 -0300	[thread overview]
Message-ID: <CAOMZO5AMy_H-zw1phB6MtNdpbCwtXg74BwHrs5YttykN=-wvnQ@mail.gmail.com> (raw)
In-Reply-To: <PA4PR04MB96407AC656705A79BF72D2E089E39@PA4PR04MB9640.eurprd04.prod.outlook.com>

Hi Li Jun,

On Tue, Dec 13, 2022 at 5:15 AM Jun Li <jun.li@nxp.com> wrote:

> So this disconnect and then connect is you expected behavior?

Yes, correct.

I found a way to get this behavior in both 5.10 as well as 6.1 kernels:
If I remove the USB_OTG2_OC pinctrl entry and pass
'disable-over-current', it works as expected.

On this board, the MX7D_PAD_UART3_RTS_B__USB_OTG2_OC pad goes to 3.3V
via a 10Kohm pullup resistor.

Could you please explain why removing theUSB_OTG2_OC entry makes things to work?

Thanks

  reply	other threads:[~2022-12-13  9:33 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-12 18:10 imx7: USB modem reset causes modem to not re-connect Fabio Estevam
2022-12-12 19:01 ` Fabio Estevam
2022-12-13  7:31   ` Alexander Stein
2022-12-13  8:15   ` Jun Li
2022-12-13  9:33     ` Fabio Estevam [this message]
2022-12-13 11:17       ` Jun Li
2022-12-16 12:00         ` Fabio Estevam
2022-12-13  8:12 ` Jun Li

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