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[24.155.109.49]) by smtp.gmail.com with ESMTPSA id 65sm1423105otj.17.2021.05.07.14.49.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 May 2021 14:49:37 -0700 (PDT) Received: (nullmailer pid 2952512 invoked by uid 1000); Fri, 07 May 2021 21:49:36 -0000 Date: Fri, 7 May 2021 16:49:36 -0500 From: Rob Herring To: Chris Packham Subject: Re: [PATCH v2 1/3] dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag Message-ID: <20210507214936.GA2944698@robh.at.kernel.org> References: <20210507004047.4454-1-chris.packham@alliedtelesis.co.nz> <20210507004047.4454-2-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210507004047.4454-2-chris.packham@alliedtelesis.co.nz> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, wsa@kernel.org, andy.shevchenko@gmail.com, linux-i2c@vger.kernel.org, andriy.shevchenko@linux.intel.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, May 07, 2021 at 12:40:45PM +1200, Chris Packham wrote: > Document the fsl,i2c-erratum-a004447 flag which indicates the presence > of an i2c erratum on some QorIQ SoCs. > > Signed-off-by: Chris Packham > --- > Documentation/devicetree/bindings/i2c/i2c-mpc.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml b/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml > index 7b553d559c83..98c6fcf7bf26 100644 > --- a/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml > +++ b/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml > @@ -46,6 +46,13 @@ properties: > description: | > I2C bus timeout in microseconds > > + fsl,i2c-erratum-a004447: > + $ref: /schemas/types.yaml#/definitions/flag > + description: | > + Indicates the presence of QorIQ erratum A-004447, which > + says that the standard i2c recovery scheme mechanism does > + not work and an alternate implementation is needed. The problem with adding a property for an errata is you have to update the dtb. If you use the compatible string, then only an OS update is needed. That assumes you have specific enough compatible strings. Rob