Commit 43745730 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Jiri Kosina
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HID: hid-led: add support for reading from LED devices 



Add support for reading data from LED devices.

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 5bc83936

drivers/hid/hid-led.c

+29 −0
Original line number Diff line number Diff line
@@ -115,6 +115,35 @@ static int hidled_send(struct hidled_device *ldev, __u8 *buf) 
	return ret == ldev->config->report_size ? 0 : -EMSGSIZE;

}



/* reading data is supported for report type RAW_REQUEST only */

static int hidled_recv(struct hidled_device *ldev, __u8 *buf)

{

	int ret;



	if (ldev->config->report_type != RAW_REQUEST)

		return -EINVAL;



	buf[0] = ldev->config->report_id;



	mutex_lock(&ldev->lock);



	ret = hid_hw_raw_request(ldev->hdev, buf[0], buf,

				 ldev->config->report_size,

				 HID_FEATURE_REPORT,

				 HID_REQ_SET_REPORT);

	if (ret < 0)

		goto err;



	ret = hid_hw_raw_request(ldev->hdev, buf[0], buf,

				 ldev->config->report_size,

				 HID_FEATURE_REPORT,

				 HID_REQ_GET_REPORT);

err:

	mutex_unlock(&ldev->lock);



	return ret < 0 ? ret : 0;

}



static u8 riso_kagaku_index(struct hidled_rgb *rgb)

{

	enum led_brightness r, g, b;