61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* ap_led.c
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*
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* Copyright (C) 2017 Jeremy Soller <jeremy@system76.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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static enum led_brightness ap_led_get(struct led_classdev *led_cdev) {
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u8 byte;
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ec_read(0xD9, &byte);
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return byte & 0x40 ? LED_OFF : LED_FULL;
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}
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static int ap_led_set(struct led_classdev *led_cdev, enum led_brightness value) {
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u8 byte;
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ec_read(0xD9, &byte);
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ec_write(0xD9, value ? byte & ~0x40 : byte | 0x40);
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return 0;
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}
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static struct led_classdev ap_led = {
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.name = "system76::airplane",
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.brightness_get = ap_led_get,
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.brightness_set_blocking = ap_led_set,
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.max_brightness = 1,
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.default_trigger = "rfkill-any"
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};
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static int __init ap_led_init(struct device *dev) {
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int err;
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err = led_classdev_register(dev, &ap_led);
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if (unlikely(err)) {
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return err;
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}
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return 0;
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}
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static void __exit ap_led_exit(void) {
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if (!IS_ERR_OR_NULL(ap_led.dev)) {
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led_classdev_unregister(&ap_led);
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}
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}
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