Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs' touchscreen

From	Dmitry Torokhov <dmitry.torokhov@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs' touchscreen
Date	2016-07-21 08:50 +0200
Message-ID	<rXfXX-3QS-5@gated-at.bofh.it> (permalink)
References	<rWVcR-7sY-3@gated-at.bofh.it> <rWVcR-7sY-1@gated-at.bofh.it> <rXfOh-3JM-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Jul 21, 2016 at 08:29:50AM +0200, Maxime Ripard wrote:
> On Wed, Jul 20, 2016 at 10:29:10AM +0200, Quentin Schulz wrote:
> > +	irq = regmap_irq_get_virq(sunxi_gpadc_mfd_dev->regmap_irqc, irq);
> > +	ret = devm_request_any_context_irq(&pdev->dev, irq,
> > +					   sunxi_gpadc_tp_up_irq_handler, 0,
> > +					   "tp_up", info);
> > +	if (ret < 0) {
> > +		dev_err(&pdev->dev,
> > +			"could not request TP_UP_PENDING interrupt: %d\n", ret);
> > +		goto err;
> > +	}
> 
> You enable the interrupts...
> 
> > +	info->tp_up_irq = irq;
> > +	disable_irq(irq);
> > +
> > +	ret = input_register_device(input);
> > +	if (ret) {
> > +		dev_err(&pdev->dev, "failed to register input device\n");
> > +		goto err;
> > +	}
> 
> ... but your driver isn't registered yet. How does input_report and
> input_sync behave in such a case?

This is explicitly allowed:

"
...
 * NOTE: input_event() may be safely used right after input device was
 * allocated with input_allocate_device(), even before it is registered
 * with input_register_device(), but the event will not reach any of the
 * input handlers. Such early invocation of input_event() may be used
 * to 'seed' initial state of a switch or initial position of absolute
 * axis, etc.
 */
"

Thanks.

-- 
Dmitry

Thread

[PATCH 4/5] input: touchscreen: support Allwinner SoCs' touchscreen Quentin Schulz <quentin.schulz@free-electrons.com> - 2016-07-20 10:40 +0200
  Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 19:30 +0200
    Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen Jonathan Cameron <jic23@kernel.org> - 2016-07-20 22:20 +0200
  Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen Maxime Ripard <maxime.ripard@free-electrons.com> - 2016-07-21 08:40 +0200
    Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-21 08:50 +0200
      Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen maxime.ripard@free-electrons.com - 2016-07-25 11:50 +0200
        Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-25 19:10 +0200
  Re: [PATCH 4/5] input: touchscreen: support Allwinner SoCs'  touchscreen Jonathan Cameron <jic23@kernel.org> - 2016-07-24 13:30 +0200

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