1 // SPDX-License-Identifier: GPL-2.0+
6  *  Author: Wei-Ning Huang <wnhuang@google.com>
20 #include "hid-ids.h"
24 /* HID usage for keyboard backlight (Alphanumeric display brightness) */
36 	struct hammer_kbd_leds *led = container_of(cdev,  in hammer_kbd_brightness_set_blocking()  local
41 	led->buf[0] = 0;  in hammer_kbd_brightness_set_blocking()
42 	led->buf[1] = br;  in hammer_kbd_brightness_set_blocking()
48 	ret = hid_hw_power(led->hdev, PM_HINT_FULLON);  in hammer_kbd_brightness_set_blocking()
50 		hid_err(led->hdev, "failed: device not resumed %d\n", ret);  in hammer_kbd_brightness_set_blocking()
54 	ret = hid_hw_output_report(led->hdev, led->buf, sizeof(led->buf));  in hammer_kbd_brightness_set_blocking()
55 	if (ret == -ENOSYS)  in hammer_kbd_brightness_set_blocking()
56 		ret = hid_hw_raw_request(led->hdev, 0, led->buf,  in hammer_kbd_brightness_set_blocking()
57 					 sizeof(led->buf),  in hammer_kbd_brightness_set_blocking()
61 		hid_err(led->hdev, "failed to set keyboard backlight: %d\n",  in hammer_kbd_brightness_set_blocking()
65 	hid_hw_power(led->hdev, PM_HINT_NORMAL);  in hammer_kbd_brightness_set_blocking()
74 	kbd_backlight = devm_kzalloc(&hdev->dev,  in hammer_register_leds()
78 		return -ENOMEM;  in hammer_register_leds()
80 	kbd_backlight->hdev = hdev;  in hammer_register_leds()
81 	kbd_backlight->cdev.name = "hammer::kbd_backlight";  in hammer_register_leds()
82 	kbd_backlight->cdev.max_brightness = MAX_BRIGHTNESS;  in hammer_register_leds()
83 	kbd_backlight->cdev.brightness_set_blocking =  in hammer_register_leds()
85 	kbd_backlight->cdev.flags = LED_HW_PLUGGABLE;  in hammer_register_leds()
87 	/* Set backlight to 0% initially. */  in hammer_register_leds()
88 	hammer_kbd_brightness_set_blocking(&kbd_backlight->cdev, 0);  in hammer_register_leds()
90 	return devm_led_classdev_register(&hdev->dev, &kbd_backlight->cdev);  in hammer_register_leds()
97 		&hdev->report_enum[HID_OUTPUT_REPORT].report_list;  in hammer_input_configured()
105 	if (report->maxfield == 1 &&  in hammer_input_configured()
106 	    report->field[0]->application == HID_GD_KEYBOARD &&  in hammer_input_configured()
107 	    report->field[0]->maxusage == 1 &&  in hammer_input_configured()
108 	    report->field[0]->usage[0].hid == HID_AD_BRIGHTNESS) {  in hammer_input_configured()
113 				"Failed to register keyboard backlight: %d\n",  in hammer_input_configured()