linux-kernel - Re: [PATCH v2 2/3] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for P2041 i2c controllers

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Message-ID: <5e625652e3f980b7cd9fb86fe3d66f19a2f4201d.camel@infinera.com>
Date:   Fri, 7 May 2021 08:04:34 +0000
From:   Joakim Tjernlund <Joakim.Tjernlund@...inera.com>
To:     "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "chris.packham@...iedtelesis.co.nz" 
        <chris.packham@...iedtelesis.co.nz>,
        "wsa@...nel.org" <wsa@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
CC:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "paulus@...ba.org" <paulus@...ba.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for
 P2041 i2c controllers

On Fri, 2021-05-07 at 12:40 +1200, Chris Packham wrote:
> The i2c controllers on the P2040/P2041 have an erratum where the
> documented scheme for i2c bus recovery will not work (A-004447). A
> different mechanism is needed which is documented in the P2040 Chip
> Errata Rev Q (latest available at the time of writing).

From what I can tell this Erratum also applies to P1010

 Jocke