Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional

From	Leo Li <pku.leo@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional
Date	2016-09-07 18:50 +0200
Message-ID	<seOcW-2cL-13@gated-at.bofh.it> (permalink)
References	(3 earlier) <sewzo-7DZ-7@gated-at.bofh.it> <sexlM-8f7-11@gated-at.bofh.it> <seE3T-45E-13@gated-at.bofh.it> <seE3T-45E-11@gated-at.bofh.it> <seOcW-2cL-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Sep 7, 2016 at 5:07 AM, Tracy Smith <tlsmith3777@gmail.com> wrote:
> Hello, bus recovery is needed generally speaking because of potential
> protocol errors that might cause a failure condition hanging the bus.
>
> It happens frequently during bring-up of new I2C devices because firmware in
> I2C controllers fail to handle properly protocol errors.
>
> Can NXP add bus recovery for the LS1021A and LS1043A in a separate patch--
> unless there is no HW bus recovery mechanism?
>
> The concern is while fixing I.MX, NXP will fail to fix the driver bus
> recovery for the LS1021A and LS1043A and the bus will hang.
>
> If bus recovery is supported on the LS1021A and the LS1043A, a patch should
> be provided or added in this patch instead of simply disabling bus recovery.
> Request NXP to consider the patch if there is HW support for bus recovery.

I'm not the right person to answer if this is possible.  I will
forward your request to the related developer.

Thanks,
Leo

Thread

Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Uwe Kleine-König          <u.kleine-koenig@pengutronix.de> - 2016-09-06 21:10 +0200
  Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Leo Li <pku.leo@gmail.com> - 2016-09-06 22:10 +0200
    Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Uwe Kleine-König          <u.kleine-koenig@pengutronix.de> - 2016-09-06 23:10 +0200
      Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Leo Li <pku.leo@gmail.com> - 2016-09-07 01:20 +0200
    Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Stefan Agner <stefan@agner.ch> - 2016-09-07 00:00 +0200
      Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Leo Li <pku.leo@gmail.com> - 2016-09-07 00:50 +0200
        Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Uwe Kleine-König          <u.kleine-koenig@pengutronix.de> - 2016-09-07 08:00 +0200
          Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Leo Li <pku.leo@gmail.com> - 2016-09-07 18:50 +0200
        Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Stefan Agner <stefan@agner.ch> - 2016-09-09 00:50 +0200
          Re: [PATCH v5] i2c: imx: make bus recovery through pinctrl optional Leo Li <pku.leo@gmail.com> - 2016-09-09 02:00 +0200

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