linux-kernel - Re: [eBeam PATCH 2/2] input: misc: New USB eBeam input driver.

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Date:	Wed, 05 Sep 2012 09:29:49 +0200
From:	Oliver Neukum <oneukum@...e.de>
To:	Yann Cantin <yann.cantin@...oste.net>
Cc:	linux-input@...r.kernel.org, linux-usb@...r.kernel.org,
	gregkh@...uxfoundation.org, dmitry.torokhov@...il.com,
	linux-kernel@...r.kernel.org, jikos@...e.cz
Subject: Re: [eBeam PATCH 2/2] input: misc: New USB eBeam input driver.

On Sunday 02 September 2012 00:52:03 Yann Cantin wrote:

Hi,

before we add yet another sysfs interface, we should ask whether calibration
isn't a problem that should be solved with a common API.

	Regards
		Oliver

> +static ssize_t ebeam_calibrated_set(struct device *dev,
> +                                   struct device_attribute *attr,
> +                                   const char *buf,
> +                                   size_t count)
> +{
> +       struct ebeam_device *ebeam = dev_get_drvdata(dev);
> +       int err, c;
> +
> +       err = kstrtoint(buf, 10, &c);
> +       if (err)
> +               return err;
> +
> +       if (c == 1) {
> +               memcpy(&ebeam->cursetting, &ebeam->newsetting,
> +                      sizeof(struct ebeam_settings));
> +               ebeam->calibrated = true;
> +               ebeam_setup_input(ebeam, ebeam->input);
> +       } else {
> +               memcpy(&ebeam->newsetting, &ebeam->cursetting,
> +                      sizeof(struct ebeam_settings));
> +               ebeam->calibrated = false;
> +               ebeam_setup_input(ebeam, ebeam->input);
> +       }
> +
> +       return count;
> +}
> +
> +static DEVICE_ATTR(calibrated, S_IRUGO | S_IWUGO,
> +                  ebeam_calibrated_get, ebeam_calibrated_set);
> +
> +static struct attribute *ebeam_attrs[] = {
> +       &dev_attr_min_x.attr,
> +       &dev_attr_min_y.attr,
> +       &dev_attr_max_x.attr,
> +       &dev_attr_max_y.attr,
> +       &dev_attr_h1.attr,
> +       &dev_attr_h2.attr,
> +       &dev_attr_h3.attr,
> +       &dev_attr_h4.attr,
> +       &dev_attr_h5.attr,
> +       &dev_attr_h6.attr,
> +       &dev_attr_h7.attr,
> +       &dev_attr_h8.attr,
> +       &dev_attr_h9.attr,
> +       &dev_attr_calibrated.attr,
> +       NULL
> +};
> +
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