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[91.78.208.152]) by smtp.googlemail.com with ESMTPSA id h16sm1303197ljl.73.2020.04.01.07.38.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 01 Apr 2020 07:38:58 -0700 (PDT) Subject: Re: [PATCH v10 43/55] dt-bindings: input: atmel: support to set max bytes transferred To: Jiada Wang , nick@shmanahar.org, dmitry.torokhov@gmail.com, jikos@kernel.org, benjamin.tissoires@redhat.com, bsz@semihalf.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, erosca@de.adit-jv.com, Andrew_Gabbasov@mentor.com References: <20200331105051.58896-1-jiada_wang@mentor.com> <20200331105051.58896-44-jiada_wang@mentor.com> From: Dmitry Osipenko Message-ID: Date: Wed, 1 Apr 2020 17:38:57 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200331105051.58896-44-jiada_wang@mentor.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org 31.03.2020 13:50, Jiada Wang пишет: > Add support to set max bytes transferred in an i2c transaction > > Signed-off-by: Jiada Wang > --- > Documentation/devicetree/bindings/input/atmel,maxtouch.txt | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt > index 126266891cdc..37a798cab0dd 100644 > --- a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt > +++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt > @@ -45,6 +45,8 @@ Optional properties for main touchpad device: > > - atmel,input_name: Override name of input device from the default. > > +- atmel,mtu: Maximum number of bytes that can read/transferred in an i2c transaction > + > Example: > > touch@4b { > @@ -52,4 +54,5 @@ Example: > reg = <0x4b>; > interrupt-parent = <&gpio>; > interrupts = ; > + atmel,mtu = <200> > }; > Is this a software (firmware) limitation which varies from version to version? If the limitation is per-hardware version, then perhaps should be better to have a hardcoded per-hardware table of limits in the driver?