1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * System76 ACPI Driver
4 *
5 * Copyright (C) 2023 System76
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/acpi.h>
13 #include <linux/hwmon.h>
14 #include <linux/hwmon-sysfs.h>
15 #include <linux/init.h>
16 #include <linux/input.h>
17 #include <linux/kernel.h>
18 #include <linux/leds.h>
19 #include <linux/module.h>
20 #include <linux/pci_ids.h>
21 #include <linux/power_supply.h>
22 #include <linux/sysfs.h>
23 #include <linux/types.h>
24
25 #include <acpi/battery.h>
26
27 enum kbled_type {
28 KBLED_NONE,
29 KBLED_WHITE,
30 KBLED_RGB,
31 };
32
33 struct system76_data {
34 struct acpi_device *acpi_dev;
35 struct led_classdev ap_led;
36 struct led_classdev kb_led;
37 enum led_brightness kb_brightness;
38 enum led_brightness kb_toggle_brightness;
39 int kb_color;
40 struct device *therm;
41 union acpi_object *nfan;
42 union acpi_object *ntmp;
43 struct input_dev *input;
44 bool has_open_ec;
45 enum kbled_type kbled_type;
46 };
47
48 static const struct acpi_device_id device_ids[] = {
49 {"17761776", 0},
50 {"", 0},
51 };
52 MODULE_DEVICE_TABLE(acpi, device_ids);
53
54 // Array of keyboard LED brightness levels
55 static const enum led_brightness kb_levels[] = {
56 48,
57 72,
58 96,
59 144,
60 192,
61 255
62 };
63
64 // Array of keyboard LED colors in 24-bit RGB format
65 static const int kb_colors[] = {
66 0xFFFFFF,
67 0x0000FF,
68 0xFF0000,
69 0xFF00FF,
70 0x00FF00,
71 0x00FFFF,
72 0xFFFF00
73 };
74
75 // Get a System76 ACPI device value by name
system76_get(struct system76_data * data,char * method)76 static int system76_get(struct system76_data *data, char *method)
77 {
78 acpi_handle handle;
79 acpi_status status;
80 unsigned long long ret = 0;
81
82 handle = acpi_device_handle(data->acpi_dev);
83 status = acpi_evaluate_integer(handle, method, NULL, &ret);
84 if (ACPI_SUCCESS(status))
85 return ret;
86 return -ENODEV;
87 }
88
89 // Get a System76 ACPI device value by name with index
system76_get_index(struct system76_data * data,char * method,int index)90 static int system76_get_index(struct system76_data *data, char *method, int index)
91 {
92 union acpi_object obj;
93 struct acpi_object_list obj_list;
94 acpi_handle handle;
95 acpi_status status;
96 unsigned long long ret = 0;
97
98 obj.type = ACPI_TYPE_INTEGER;
99 obj.integer.value = index;
100 obj_list.count = 1;
101 obj_list.pointer = &obj;
102
103 handle = acpi_device_handle(data->acpi_dev);
104 status = acpi_evaluate_integer(handle, method, &obj_list, &ret);
105 if (ACPI_SUCCESS(status))
106 return ret;
107 return -ENODEV;
108 }
109
110 // Get a System76 ACPI device object by name
system76_get_object(struct system76_data * data,char * method,union acpi_object ** obj)111 static int system76_get_object(struct system76_data *data, char *method, union acpi_object **obj)
112 {
113 acpi_handle handle;
114 acpi_status status;
115 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
116
117 handle = acpi_device_handle(data->acpi_dev);
118 status = acpi_evaluate_object(handle, method, NULL, &buf);
119 if (ACPI_SUCCESS(status)) {
120 *obj = buf.pointer;
121 return 0;
122 }
123
124 return -ENODEV;
125 }
126
127 // Get a name from a System76 ACPI device object
system76_name(union acpi_object * obj,int index)128 static char *system76_name(union acpi_object *obj, int index)
129 {
130 if (obj && obj->type == ACPI_TYPE_PACKAGE && index <= obj->package.count) {
131 if (obj->package.elements[index].type == ACPI_TYPE_STRING)
132 return obj->package.elements[index].string.pointer;
133 }
134
135 return NULL;
136 }
137
138 // Set a System76 ACPI device value by name
system76_set(struct system76_data * data,char * method,int value)139 static int system76_set(struct system76_data *data, char *method, int value)
140 {
141 union acpi_object obj;
142 struct acpi_object_list obj_list;
143 acpi_handle handle;
144 acpi_status status;
145
146 obj.type = ACPI_TYPE_INTEGER;
147 obj.integer.value = value;
148 obj_list.count = 1;
149 obj_list.pointer = &obj;
150 handle = acpi_device_handle(data->acpi_dev);
151 status = acpi_evaluate_object(handle, method, &obj_list, NULL);
152 if (ACPI_SUCCESS(status))
153 return 0;
154 else
155 return -1;
156 }
157
158 #define BATTERY_THRESHOLD_INVALID 0xFF
159
160 enum {
161 THRESHOLD_START,
162 THRESHOLD_END,
163 };
164
battery_get_threshold(int which,char * buf)165 static ssize_t battery_get_threshold(int which, char *buf)
166 {
167 struct acpi_object_list input;
168 union acpi_object param;
169 acpi_handle handle;
170 acpi_status status;
171 unsigned long long ret = BATTERY_THRESHOLD_INVALID;
172
173 handle = ec_get_handle();
174 if (!handle)
175 return -ENODEV;
176
177 input.count = 1;
178 input.pointer = ¶m;
179 // Start/stop selection
180 param.type = ACPI_TYPE_INTEGER;
181 param.integer.value = which;
182
183 status = acpi_evaluate_integer(handle, "GBCT", &input, &ret);
184 if (ACPI_FAILURE(status))
185 return -EIO;
186 if (ret == BATTERY_THRESHOLD_INVALID)
187 return -EINVAL;
188
189 return sysfs_emit(buf, "%d\n", (int)ret);
190 }
191
battery_set_threshold(int which,const char * buf,size_t count)192 static ssize_t battery_set_threshold(int which, const char *buf, size_t count)
193 {
194 struct acpi_object_list input;
195 union acpi_object params[2];
196 acpi_handle handle;
197 acpi_status status;
198 unsigned int value;
199 int ret;
200
201 handle = ec_get_handle();
202 if (!handle)
203 return -ENODEV;
204
205 ret = kstrtouint(buf, 10, &value);
206 if (ret)
207 return ret;
208
209 if (value > 100)
210 return -EINVAL;
211
212 input.count = 2;
213 input.pointer = params;
214 // Start/stop selection
215 params[0].type = ACPI_TYPE_INTEGER;
216 params[0].integer.value = which;
217 // Threshold value
218 params[1].type = ACPI_TYPE_INTEGER;
219 params[1].integer.value = value;
220
221 status = acpi_evaluate_object(handle, "SBCT", &input, NULL);
222 if (ACPI_FAILURE(status))
223 return -EIO;
224
225 return count;
226 }
227
charge_control_start_threshold_show(struct device * dev,struct device_attribute * attr,char * buf)228 static ssize_t charge_control_start_threshold_show(struct device *dev,
229 struct device_attribute *attr, char *buf)
230 {
231 return battery_get_threshold(THRESHOLD_START, buf);
232 }
233
charge_control_start_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)234 static ssize_t charge_control_start_threshold_store(struct device *dev,
235 struct device_attribute *attr, const char *buf, size_t count)
236 {
237 return battery_set_threshold(THRESHOLD_START, buf, count);
238 }
239
240 static DEVICE_ATTR_RW(charge_control_start_threshold);
241
charge_control_end_threshold_show(struct device * dev,struct device_attribute * attr,char * buf)242 static ssize_t charge_control_end_threshold_show(struct device *dev,
243 struct device_attribute *attr, char *buf)
244 {
245 return battery_get_threshold(THRESHOLD_END, buf);
246 }
247
charge_control_end_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)248 static ssize_t charge_control_end_threshold_store(struct device *dev,
249 struct device_attribute *attr, const char *buf, size_t count)
250 {
251 return battery_set_threshold(THRESHOLD_END, buf, count);
252 }
253
254 static DEVICE_ATTR_RW(charge_control_end_threshold);
255
256 static struct attribute *system76_battery_attrs[] = {
257 &dev_attr_charge_control_start_threshold.attr,
258 &dev_attr_charge_control_end_threshold.attr,
259 NULL,
260 };
261
262 ATTRIBUTE_GROUPS(system76_battery);
263
system76_battery_add(struct power_supply * battery,struct acpi_battery_hook * hook)264 static int system76_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
265 {
266 // System76 EC only supports 1 battery
267 if (strcmp(battery->desc->name, "BAT0") != 0)
268 return -ENODEV;
269
270 if (device_add_groups(&battery->dev, system76_battery_groups))
271 return -ENODEV;
272
273 return 0;
274 }
275
system76_battery_remove(struct power_supply * battery,struct acpi_battery_hook * hook)276 static int system76_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
277 {
278 device_remove_groups(&battery->dev, system76_battery_groups);
279 return 0;
280 }
281
282 static struct acpi_battery_hook system76_battery_hook = {
283 .add_battery = system76_battery_add,
284 .remove_battery = system76_battery_remove,
285 .name = "System76 Battery Extension",
286 };
287
system76_battery_init(void)288 static void system76_battery_init(void)
289 {
290 battery_hook_register(&system76_battery_hook);
291 }
292
system76_battery_exit(void)293 static void system76_battery_exit(void)
294 {
295 battery_hook_unregister(&system76_battery_hook);
296 }
297
298 // Get the airplane mode LED brightness
ap_led_get(struct led_classdev * led)299 static enum led_brightness ap_led_get(struct led_classdev *led)
300 {
301 struct system76_data *data;
302 int value;
303
304 data = container_of(led, struct system76_data, ap_led);
305 value = system76_get(data, "GAPL");
306 if (value > 0)
307 return (enum led_brightness)value;
308 else
309 return LED_OFF;
310 }
311
312 // Set the airplane mode LED brightness
ap_led_set(struct led_classdev * led,enum led_brightness value)313 static int ap_led_set(struct led_classdev *led, enum led_brightness value)
314 {
315 struct system76_data *data;
316
317 data = container_of(led, struct system76_data, ap_led);
318 return system76_set(data, "SAPL", value == LED_OFF ? 0 : 1);
319 }
320
321 // Get the last set keyboard LED brightness
kb_led_get(struct led_classdev * led)322 static enum led_brightness kb_led_get(struct led_classdev *led)
323 {
324 struct system76_data *data;
325
326 data = container_of(led, struct system76_data, kb_led);
327 return data->kb_brightness;
328 }
329
330 // Set the keyboard LED brightness
kb_led_set(struct led_classdev * led,enum led_brightness value)331 static int kb_led_set(struct led_classdev *led, enum led_brightness value)
332 {
333 struct system76_data *data;
334
335 data = container_of(led, struct system76_data, kb_led);
336 data->kb_brightness = value;
337 if (acpi_has_method(acpi_device_handle(data->acpi_dev), "GKBK")) {
338 return system76_set(data, "SKBB", (int)data->kb_brightness);
339 } else {
340 return system76_set(data, "SKBL", (int)data->kb_brightness);
341 }
342 }
343
344 // Get the last set keyboard LED color
kb_led_color_show(struct device * dev,struct device_attribute * dev_attr,char * buf)345 static ssize_t kb_led_color_show(
346 struct device *dev,
347 struct device_attribute *dev_attr,
348 char *buf)
349 {
350 struct led_classdev *led;
351 struct system76_data *data;
352
353 led = dev_get_drvdata(dev);
354 data = container_of(led, struct system76_data, kb_led);
355 return sysfs_emit(buf, "%06X\n", data->kb_color);
356 }
357
358 // Set the keyboard LED color
kb_led_color_store(struct device * dev,struct device_attribute * dev_attr,const char * buf,size_t size)359 static ssize_t kb_led_color_store(
360 struct device *dev,
361 struct device_attribute *dev_attr,
362 const char *buf,
363 size_t size)
364 {
365 struct led_classdev *led;
366 struct system76_data *data;
367 unsigned int val;
368 int ret;
369
370 led = dev_get_drvdata(dev);
371 data = container_of(led, struct system76_data, kb_led);
372 ret = kstrtouint(buf, 16, &val);
373 if (ret)
374 return ret;
375 if (val > 0xFFFFFF)
376 return -EINVAL;
377 data->kb_color = (int)val;
378 system76_set(data, "SKBC", data->kb_color);
379
380 return size;
381 }
382
383 static struct device_attribute dev_attr_kb_led_color = {
384 .attr = {
385 .name = "color",
386 .mode = 0644,
387 },
388 .show = kb_led_color_show,
389 .store = kb_led_color_store,
390 };
391
392 static struct attribute *system76_kb_led_color_attrs[] = {
393 &dev_attr_kb_led_color.attr,
394 NULL,
395 };
396
397 ATTRIBUTE_GROUPS(system76_kb_led_color);
398
399 // Notify that the keyboard LED was changed by hardware
kb_led_notify(struct system76_data * data)400 static void kb_led_notify(struct system76_data *data)
401 {
402 led_classdev_notify_brightness_hw_changed(
403 &data->kb_led,
404 data->kb_brightness
405 );
406 }
407
408 // Read keyboard LED brightness as set by hardware
kb_led_hotkey_hardware(struct system76_data * data)409 static void kb_led_hotkey_hardware(struct system76_data *data)
410 {
411 int value;
412
413 if (acpi_has_method(acpi_device_handle(data->acpi_dev), "GKBK")) {
414 value = system76_get(data, "GKBB");
415 } else {
416 value = system76_get(data, "GKBL");
417 }
418
419 if (value < 0)
420 return;
421 data->kb_brightness = value;
422 kb_led_notify(data);
423 }
424
425 // Toggle the keyboard LED
kb_led_hotkey_toggle(struct system76_data * data)426 static void kb_led_hotkey_toggle(struct system76_data *data)
427 {
428 if (data->kb_brightness > 0) {
429 data->kb_toggle_brightness = data->kb_brightness;
430 kb_led_set(&data->kb_led, 0);
431 } else {
432 kb_led_set(&data->kb_led, data->kb_toggle_brightness);
433 }
434 kb_led_notify(data);
435 }
436
437 // Decrease the keyboard LED brightness
kb_led_hotkey_down(struct system76_data * data)438 static void kb_led_hotkey_down(struct system76_data *data)
439 {
440 int i;
441
442 if (data->kb_brightness > 0) {
443 for (i = ARRAY_SIZE(kb_levels); i > 0; i--) {
444 if (kb_levels[i - 1] < data->kb_brightness) {
445 kb_led_set(&data->kb_led, kb_levels[i - 1]);
446 break;
447 }
448 }
449 } else {
450 kb_led_set(&data->kb_led, data->kb_toggle_brightness);
451 }
452 kb_led_notify(data);
453 }
454
455 // Increase the keyboard LED brightness
kb_led_hotkey_up(struct system76_data * data)456 static void kb_led_hotkey_up(struct system76_data *data)
457 {
458 int i;
459
460 if (data->kb_brightness > 0) {
461 for (i = 0; i < ARRAY_SIZE(kb_levels); i++) {
462 if (kb_levels[i] > data->kb_brightness) {
463 kb_led_set(&data->kb_led, kb_levels[i]);
464 break;
465 }
466 }
467 } else {
468 kb_led_set(&data->kb_led, data->kb_toggle_brightness);
469 }
470 kb_led_notify(data);
471 }
472
473 // Cycle the keyboard LED color
kb_led_hotkey_color(struct system76_data * data)474 static void kb_led_hotkey_color(struct system76_data *data)
475 {
476 int i;
477
478 if (data->kbled_type != KBLED_RGB)
479 return;
480
481 if (data->kb_brightness > 0) {
482 for (i = 0; i < ARRAY_SIZE(kb_colors); i++) {
483 if (kb_colors[i] == data->kb_color)
484 break;
485 }
486 i += 1;
487 if (i >= ARRAY_SIZE(kb_colors))
488 i = 0;
489 data->kb_color = kb_colors[i];
490 system76_set(data, "SKBC", data->kb_color);
491 } else {
492 kb_led_set(&data->kb_led, data->kb_toggle_brightness);
493 }
494 kb_led_notify(data);
495 }
496
thermal_is_visible(const void * drvdata,enum hwmon_sensor_types type,u32 attr,int channel)497 static umode_t thermal_is_visible(const void *drvdata, enum hwmon_sensor_types type,
498 u32 attr, int channel)
499 {
500 const struct system76_data *data = drvdata;
501
502 switch (type) {
503 case hwmon_fan:
504 case hwmon_pwm:
505 if (system76_name(data->nfan, channel))
506 return 0444;
507 break;
508
509 case hwmon_temp:
510 if (system76_name(data->ntmp, channel))
511 return 0444;
512 break;
513
514 default:
515 return 0;
516 }
517
518 return 0;
519 }
520
thermal_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)521 static int thermal_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
522 int channel, long *val)
523 {
524 struct system76_data *data = dev_get_drvdata(dev);
525 int raw;
526
527 switch (type) {
528 case hwmon_fan:
529 if (attr == hwmon_fan_input) {
530 raw = system76_get_index(data, "GFAN", channel);
531 if (raw < 0)
532 return raw;
533 *val = (raw >> 8) & 0xFFFF;
534 return 0;
535 }
536 break;
537
538 case hwmon_pwm:
539 if (attr == hwmon_pwm_input) {
540 raw = system76_get_index(data, "GFAN", channel);
541 if (raw < 0)
542 return raw;
543 *val = raw & 0xFF;
544 return 0;
545 }
546 break;
547
548 case hwmon_temp:
549 if (attr == hwmon_temp_input) {
550 raw = system76_get_index(data, "GTMP", channel);
551 if (raw < 0)
552 return raw;
553 *val = raw * 1000;
554 return 0;
555 }
556 break;
557
558 default:
559 return -EOPNOTSUPP;
560 }
561
562 return -EOPNOTSUPP;
563 }
564
thermal_read_string(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,const char ** str)565 static int thermal_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
566 int channel, const char **str)
567 {
568 struct system76_data *data = dev_get_drvdata(dev);
569
570 switch (type) {
571 case hwmon_fan:
572 if (attr == hwmon_fan_label) {
573 *str = system76_name(data->nfan, channel);
574 if (*str)
575 return 0;
576 }
577 break;
578
579 case hwmon_temp:
580 if (attr == hwmon_temp_label) {
581 *str = system76_name(data->ntmp, channel);
582 if (*str)
583 return 0;
584 }
585 break;
586
587 default:
588 return -EOPNOTSUPP;
589 }
590
591 return -EOPNOTSUPP;
592 }
593
594 static const struct hwmon_ops thermal_ops = {
595 .is_visible = thermal_is_visible,
596 .read = thermal_read,
597 .read_string = thermal_read_string,
598 };
599
600 // Allocate up to 8 fans and temperatures
601 static const struct hwmon_channel_info * const thermal_channel_info[] = {
602 HWMON_CHANNEL_INFO(fan,
603 HWMON_F_INPUT | HWMON_F_LABEL,
604 HWMON_F_INPUT | HWMON_F_LABEL,
605 HWMON_F_INPUT | HWMON_F_LABEL,
606 HWMON_F_INPUT | HWMON_F_LABEL,
607 HWMON_F_INPUT | HWMON_F_LABEL,
608 HWMON_F_INPUT | HWMON_F_LABEL,
609 HWMON_F_INPUT | HWMON_F_LABEL,
610 HWMON_F_INPUT | HWMON_F_LABEL),
611 HWMON_CHANNEL_INFO(pwm,
612 HWMON_PWM_INPUT,
613 HWMON_PWM_INPUT,
614 HWMON_PWM_INPUT,
615 HWMON_PWM_INPUT,
616 HWMON_PWM_INPUT,
617 HWMON_PWM_INPUT,
618 HWMON_PWM_INPUT,
619 HWMON_PWM_INPUT),
620 HWMON_CHANNEL_INFO(temp,
621 HWMON_T_INPUT | HWMON_T_LABEL,
622 HWMON_T_INPUT | HWMON_T_LABEL,
623 HWMON_T_INPUT | HWMON_T_LABEL,
624 HWMON_T_INPUT | HWMON_T_LABEL,
625 HWMON_T_INPUT | HWMON_T_LABEL,
626 HWMON_T_INPUT | HWMON_T_LABEL,
627 HWMON_T_INPUT | HWMON_T_LABEL,
628 HWMON_T_INPUT | HWMON_T_LABEL),
629 NULL
630 };
631
632 static const struct hwmon_chip_info thermal_chip_info = {
633 .ops = &thermal_ops,
634 .info = thermal_channel_info,
635 };
636
input_key(struct system76_data * data,unsigned int code)637 static void input_key(struct system76_data *data, unsigned int code)
638 {
639 input_report_key(data->input, code, 1);
640 input_sync(data->input);
641
642 input_report_key(data->input, code, 0);
643 input_sync(data->input);
644 }
645
646 // Handle ACPI notification
system76_notify(struct acpi_device * acpi_dev,u32 event)647 static void system76_notify(struct acpi_device *acpi_dev, u32 event)
648 {
649 struct system76_data *data;
650
651 data = acpi_driver_data(acpi_dev);
652 switch (event) {
653 case 0x80:
654 kb_led_hotkey_hardware(data);
655 break;
656 case 0x81:
657 kb_led_hotkey_toggle(data);
658 break;
659 case 0x82:
660 kb_led_hotkey_down(data);
661 break;
662 case 0x83:
663 kb_led_hotkey_up(data);
664 break;
665 case 0x84:
666 kb_led_hotkey_color(data);
667 break;
668 case 0x85:
669 input_key(data, KEY_SCREENLOCK);
670 break;
671 }
672 }
673
674 // Add a System76 ACPI device
system76_add(struct acpi_device * acpi_dev)675 static int system76_add(struct acpi_device *acpi_dev)
676 {
677 struct system76_data *data;
678 int err;
679
680 data = devm_kzalloc(&acpi_dev->dev, sizeof(*data), GFP_KERNEL);
681 if (!data)
682 return -ENOMEM;
683 acpi_dev->driver_data = data;
684 data->acpi_dev = acpi_dev;
685
686 // Some models do not run open EC firmware. Check for an ACPI method
687 // that only exists on open EC to guard functionality specific to it.
688 data->has_open_ec = acpi_has_method(acpi_device_handle(data->acpi_dev), "NFAN");
689
690 err = system76_get(data, "INIT");
691 if (err)
692 return err;
693 data->ap_led.name = "system76_acpi::airplane";
694 data->ap_led.flags = LED_CORE_SUSPENDRESUME;
695 data->ap_led.brightness_get = ap_led_get;
696 data->ap_led.brightness_set_blocking = ap_led_set;
697 data->ap_led.max_brightness = 1;
698 data->ap_led.default_trigger = "rfkill-none";
699 err = devm_led_classdev_register(&acpi_dev->dev, &data->ap_led);
700 if (err)
701 return err;
702
703 data->kb_led.name = "system76_acpi::kbd_backlight";
704 data->kb_led.flags = LED_BRIGHT_HW_CHANGED | LED_CORE_SUSPENDRESUME;
705 data->kb_led.brightness_get = kb_led_get;
706 data->kb_led.brightness_set_blocking = kb_led_set;
707 if (acpi_has_method(acpi_device_handle(data->acpi_dev), "GKBK")) {
708 // Use the new ACPI methods
709 data->kbled_type = system76_get(data, "GKBK");
710
711 switch (data->kbled_type) {
712 case KBLED_NONE:
713 // Nothing to do: Device will not be registered.
714 break;
715 case KBLED_WHITE:
716 data->kb_led.max_brightness = 255;
717 data->kb_toggle_brightness = 72;
718 break;
719 case KBLED_RGB:
720 data->kb_led.max_brightness = 255;
721 data->kb_led.groups = system76_kb_led_color_groups;
722 data->kb_toggle_brightness = 72;
723 data->kb_color = 0xffffff;
724 system76_set(data, "SKBC", data->kb_color);
725 break;
726 }
727 } else {
728 // Use the old ACPI methods
729 if (acpi_has_method(acpi_device_handle(data->acpi_dev), "SKBC")) {
730 data->kbled_type = KBLED_RGB;
731 data->kb_led.max_brightness = 255;
732 data->kb_led.groups = system76_kb_led_color_groups;
733 data->kb_toggle_brightness = 72;
734 data->kb_color = 0xffffff;
735 system76_set(data, "SKBC", data->kb_color);
736 } else {
737 data->kbled_type = KBLED_WHITE;
738 data->kb_led.max_brightness = 5;
739 }
740 }
741
742 if (data->kbled_type != KBLED_NONE) {
743 err = devm_led_classdev_register(&acpi_dev->dev, &data->kb_led);
744 if (err)
745 return err;
746 }
747
748 data->input = devm_input_allocate_device(&acpi_dev->dev);
749 if (!data->input)
750 return -ENOMEM;
751
752 data->input->name = "System76 ACPI Hotkeys";
753 data->input->phys = "system76_acpi/input0";
754 data->input->id.bustype = BUS_HOST;
755 data->input->dev.parent = &acpi_dev->dev;
756 input_set_capability(data->input, EV_KEY, KEY_SCREENLOCK);
757
758 err = input_register_device(data->input);
759 if (err)
760 goto error;
761
762 if (data->has_open_ec) {
763 err = system76_get_object(data, "NFAN", &data->nfan);
764 if (err)
765 goto error;
766
767 err = system76_get_object(data, "NTMP", &data->ntmp);
768 if (err)
769 goto error;
770
771 data->therm = devm_hwmon_device_register_with_info(&acpi_dev->dev,
772 "system76_acpi", data, &thermal_chip_info, NULL);
773 err = PTR_ERR_OR_ZERO(data->therm);
774 if (err)
775 goto error;
776
777 system76_battery_init();
778 }
779
780 return 0;
781
782 error:
783 if (data->has_open_ec) {
784 kfree(data->ntmp);
785 kfree(data->nfan);
786 }
787 return err;
788 }
789
790 // Remove a System76 ACPI device
system76_remove(struct acpi_device * acpi_dev)791 static void system76_remove(struct acpi_device *acpi_dev)
792 {
793 struct system76_data *data;
794
795 data = acpi_driver_data(acpi_dev);
796
797 if (data->has_open_ec) {
798 system76_battery_exit();
799 kfree(data->nfan);
800 kfree(data->ntmp);
801 }
802
803 devm_led_classdev_unregister(&acpi_dev->dev, &data->ap_led);
804 devm_led_classdev_unregister(&acpi_dev->dev, &data->kb_led);
805
806 system76_get(data, "FINI");
807 }
808
809 static struct acpi_driver system76_driver = {
810 .name = "System76 ACPI Driver",
811 .class = "hotkey",
812 .ids = device_ids,
813 .ops = {
814 .add = system76_add,
815 .remove = system76_remove,
816 .notify = system76_notify,
817 },
818 };
819 module_acpi_driver(system76_driver);
820
821 MODULE_DESCRIPTION("System76 ACPI Driver");
822 MODULE_AUTHOR("Jeremy Soller <jeremy@system76.com>");
823 MODULE_LICENSE("GPL");
824