Date: Sat, 12 Dec 2015 20:58:58 -0800
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Damien Riegel <damien.riegel@savoirfairelinux.com>
Cc: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org,
        devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
        Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>, kernel@savoirfairelinux.com
Subject: Re: [PATCH 2/2] Input: add touchscreen support for TS-4800
Message-ID: <20151213045858.GB22780@dtor-ws>
References: <1449763872-572-1-git-send-email-damien.riegel@savoirfairelinux.com>
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Hi Damien,

On Thu, Dec 10, 2015 at 11:11:12AM -0500, Damien Riegel wrote:
> On this board, the touchscreen, an ads7843, is not handled directly by
> Linux but by a companion FPGA. This FPGA is memory-mapped and the IP
> design is very similar to the mk712.

...

> +
> +	poll_dev = devm_input_allocate_polled_device(&pdev->dev);
> +	if (!poll_dev)
> +		return -ENOMEM;

I wonder how useful touchscreen implemented as polling device is. Isn't
there an interrupt line for it?

Thanks.

-- 
Dmitry
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