Re: [PATCH 2/2] Input: add touchscreen support for TS-4800

From: Dmitry Torokhov
Date: Sat Dec 12 2015 - 23:59:22 EST

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?


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