wmi-other.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Lenovo Other Mode WMI interface driver.
  4 *
  5 * This driver uses the fw_attributes class to expose the various WMI functions
  6 * provided by the "Other Mode" WMI interface. This enables CPU and GPU power
  7 * limit as well as various other attributes for devices that fall under the
  8 * "Gaming Series" of Lenovo laptop devices. Each attribute exposed by the
  9 * "Other Mode" interface has a corresponding Capability Data struct that
 10 * allows the driver to probe details about the attribute such as if it is
 11 * supported by the hardware, the default_value, max_value, min_value, and step
 12 * increment.
 13 *
 14 * These attributes typically don't fit anywhere else in the sysfs and are set
 15 * in Windows using one of Lenovo's multiple user applications.
 16 *
 17 * Copyright (C) 2025 Derek J. Clark <derekjohn.clark@gmail.com>
 18 */
 19
 20#include <linux/acpi.h>
 21#include <linux/bitfield.h>
 22#include <linux/cleanup.h>
 23#include <linux/component.h>
 24#include <linux/container_of.h>
 25#include <linux/device.h>
 26#include <linux/export.h>
 27#include <linux/gfp_types.h>
 28#include <linux/idr.h>
 29#include <linux/kdev_t.h>
 30#include <linux/kobject.h>
 31#include <linux/module.h>
 32#include <linux/notifier.h>
 33#include <linux/platform_profile.h>
 34#include <linux/types.h>
 35#include <linux/wmi.h>
 36
 37#include "wmi-capdata01.h"
 38#include "wmi-events.h"
 39#include "wmi-gamezone.h"
 40#include "wmi-helpers.h"
 41#include "wmi-other.h"
 42#include "../firmware_attributes_class.h"
 43
 44#define LENOVO_OTHER_MODE_GUID "DC2A8805-3A8C-41BA-A6F7-092E0089CD3B"
 45
 46#define LWMI_DEVICE_ID_CPU 0x01
 47
 48#define LWMI_FEATURE_ID_CPU_SPPT 0x01
 49#define LWMI_FEATURE_ID_CPU_SPL 0x02
 50#define LWMI_FEATURE_ID_CPU_FPPT 0x03
 51
 52#define LWMI_TYPE_ID_NONE 0x00
 53
 54#define LWMI_FEATURE_VALUE_GET 17
 55#define LWMI_FEATURE_VALUE_SET 18
 56
 57#define LWMI_ATTR_DEV_ID_MASK GENMASK(31, 24)
 58#define LWMI_ATTR_FEAT_ID_MASK GENMASK(23, 16)
 59#define LWMI_ATTR_MODE_ID_MASK GENMASK(15, 8)
 60#define LWMI_ATTR_TYPE_ID_MASK GENMASK(7, 0)
 61
 62#define LWMI_OM_FW_ATTR_BASE_PATH "lenovo-wmi-other"
 63
 64static BLOCKING_NOTIFIER_HEAD(om_chain_head);
 65static DEFINE_IDA(lwmi_om_ida);
 66
 67enum attribute_property {
 68	DEFAULT_VAL,
 69	MAX_VAL,
 70	MIN_VAL,
 71	STEP_VAL,
 72	SUPPORTED,
 73};
 74
 75struct lwmi_om_priv {
 76	struct component_master_ops *ops;
 77	struct cd01_list *cd01_list; /* only valid after capdata01 bind */
 78	struct device *fw_attr_dev;
 79	struct kset *fw_attr_kset;
 80	struct notifier_block nb;
 81	struct wmi_device *wdev;
 82	int ida_id;
 83};
 84
 85struct tunable_attr_01 {
 86	struct capdata01 *capdata;
 87	struct device *dev;
 88	u32 feature_id;
 89	u32 device_id;
 90	u32 type_id;
 91};
 92
 93static struct tunable_attr_01 ppt_pl1_spl = {
 94	.device_id = LWMI_DEVICE_ID_CPU,
 95	.feature_id = LWMI_FEATURE_ID_CPU_SPL,
 96	.type_id = LWMI_TYPE_ID_NONE,
 97};
 98
 99static struct tunable_attr_01 ppt_pl2_sppt = {
100	.device_id = LWMI_DEVICE_ID_CPU,
101	.feature_id = LWMI_FEATURE_ID_CPU_SPPT,
102	.type_id = LWMI_TYPE_ID_NONE,
103};
104
105static struct tunable_attr_01 ppt_pl3_fppt = {
106	.device_id = LWMI_DEVICE_ID_CPU,
107	.feature_id = LWMI_FEATURE_ID_CPU_FPPT,
108	.type_id = LWMI_TYPE_ID_NONE,
109};
110
111struct capdata01_attr_group {
112	const struct attribute_group *attr_group;
113	struct tunable_attr_01 *tunable_attr;
114};
115
116/**
117 * lwmi_om_register_notifier() - Add a notifier to the blocking notifier chain
118 * @nb: The notifier_block struct to register
119 *
120 * Call blocking_notifier_chain_register to register the notifier block to the
121 * lenovo-wmi-other driver notifier chain.
122 *
123 * Return: 0 on success, %-EEXIST on error.
124 */
125int lwmi_om_register_notifier(struct notifier_block *nb)
126{
127	return blocking_notifier_chain_register(&om_chain_head, nb);
128}
129EXPORT_SYMBOL_NS_GPL(lwmi_om_register_notifier, "LENOVO_WMI_OTHER");
130
131/**
132 * lwmi_om_unregister_notifier() - Remove a notifier from the blocking notifier
133 * chain.
134 * @nb: The notifier_block struct to register
135 *
136 * Call blocking_notifier_chain_unregister to unregister the notifier block from the
137 * lenovo-wmi-other driver notifier chain.
138 *
139 * Return: 0 on success, %-ENOENT on error.
140 */
141int lwmi_om_unregister_notifier(struct notifier_block *nb)
142{
143	return blocking_notifier_chain_unregister(&om_chain_head, nb);
144}
145EXPORT_SYMBOL_NS_GPL(lwmi_om_unregister_notifier, "LENOVO_WMI_OTHER");
146
147/**
148 * devm_lwmi_om_unregister_notifier() - Remove a notifier from the blocking
149 * notifier chain.
150 * @data: Void pointer to the notifier_block struct to register.
151 *
152 * Call lwmi_om_unregister_notifier to unregister the notifier block from the
153 * lenovo-wmi-other driver notifier chain.
154 *
155 * Return: 0 on success, %-ENOENT on error.
156 */
157static void devm_lwmi_om_unregister_notifier(void *data)
158{
159	struct notifier_block *nb = data;
160
161	lwmi_om_unregister_notifier(nb);
162}
163
164/**
165 * devm_lwmi_om_register_notifier() - Add a notifier to the blocking notifier
166 * chain.
167 * @dev: The parent device of the notifier_block struct.
168 * @nb: The notifier_block struct to register
169 *
170 * Call lwmi_om_register_notifier to register the notifier block to the
171 * lenovo-wmi-other driver notifier chain. Then add devm_lwmi_om_unregister_notifier
172 * as a device managed action to automatically unregister the notifier block
173 * upon parent device removal.
174 *
175 * Return: 0 on success, or an error code.
176 */
177int devm_lwmi_om_register_notifier(struct device *dev,
178				   struct notifier_block *nb)
179{
180	int ret;
181
182	ret = lwmi_om_register_notifier(nb);
183	if (ret < 0)
184		return ret;
185
186	return devm_add_action_or_reset(dev, devm_lwmi_om_unregister_notifier,
187					nb);
188}
189EXPORT_SYMBOL_NS_GPL(devm_lwmi_om_register_notifier, "LENOVO_WMI_OTHER");
190
191/**
192 * lwmi_om_notifier_call() - Call functions for the notifier call chain.
193 * @mode: Pointer to a thermal mode enum to retrieve the data from.
194 *
195 * Call blocking_notifier_call_chain to retrieve the thermal mode from the
196 * lenovo-wmi-gamezone driver.
197 *
198 * Return: 0 on success, or an error code.
199 */
200static int lwmi_om_notifier_call(enum thermal_mode *mode)
201{
202	int ret;
203
204	ret = blocking_notifier_call_chain(&om_chain_head,
205					   LWMI_GZ_GET_THERMAL_MODE, &mode);
206	if ((ret & ~NOTIFY_STOP_MASK) != NOTIFY_OK)
207		return -EINVAL;
208
209	return 0;
210}
211
212/* Attribute Methods */
213
214/**
215 * int_type_show() - Emit the data type for an integer attribute
216 * @kobj: Pointer to the driver object.
217 * @kattr: Pointer to the attribute calling this function.
218 * @buf: The buffer to write to.
219 *
220 * Return: Number of characters written to buf.
221 */
222static ssize_t int_type_show(struct kobject *kobj, struct kobj_attribute *kattr,
223			     char *buf)
224{
225	return sysfs_emit(buf, "integer\n");
226}
227
228/**
229 * attr_capdata01_show() - Get the value of the specified attribute property
230 *
231 * @kobj: Pointer to the driver object.
232 * @kattr: Pointer to the attribute calling this function.
233 * @buf: The buffer to write to.
234 * @tunable_attr: The attribute to be read.
235 * @prop: The property of this attribute to be read.
236 *
237 * Retrieves the given property from the capability data 01 struct for the
238 * specified attribute's "custom" thermal mode. This function is intended
239 * to be generic so it can be called from any integer attributes "_show"
240 * function.
241 *
242 * If the WMI is success the sysfs attribute is notified.
243 *
244 * Return: Either number of characters written to buf, or an error code.
245 */
246static ssize_t attr_capdata01_show(struct kobject *kobj,
247				   struct kobj_attribute *kattr, char *buf,
248				   struct tunable_attr_01 *tunable_attr,
249				   enum attribute_property prop)
250{
251	struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
252	struct capdata01 capdata;
253	u32 attribute_id;
254	int value, ret;
255
256	attribute_id =
257		FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, tunable_attr->device_id) |
258		FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, tunable_attr->feature_id) |
259		FIELD_PREP(LWMI_ATTR_MODE_ID_MASK,
260			   LWMI_GZ_THERMAL_MODE_CUSTOM) |
261		FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, tunable_attr->type_id);
262
263	ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
264	if (ret)
265		return ret;
266
267	switch (prop) {
268	case DEFAULT_VAL:
269		value = capdata.default_value;
270		break;
271	case MAX_VAL:
272		value = capdata.max_value;
273		break;
274	case MIN_VAL:
275		value = capdata.min_value;
276		break;
277	case STEP_VAL:
278		value = capdata.step;
279		break;
280	default:
281		return -EINVAL;
282	}
283
284	return sysfs_emit(buf, "%d\n", value);
285}
286
287/**
288 * attr_current_value_store() - Set the current value of the given attribute
289 * @kobj: Pointer to the driver object.
290 * @kattr: Pointer to the attribute calling this function.
291 * @buf: The buffer to read from, this is parsed to `int` type.
292 * @count: Required by sysfs attribute macros, pass in from the callee attr.
293 * @tunable_attr: The attribute to be stored.
294 *
295 * Sets the value of the given attribute when operating under the "custom"
296 * smartfan profile. The current smartfan profile is retrieved from the
297 * lenovo-wmi-gamezone driver and error is returned if the result is not
298 * "custom". This function is intended to be generic so it can be called from
299 * any integer attribute's "_store" function. The integer to be sent to the WMI
300 * method is range checked and an error code is returned if out of range.
301 *
302 * If the value is valid and WMI is success, then the sysfs attribute is
303 * notified.
304 *
305 * Return: Either count, or an error code.
306 */
307static ssize_t attr_current_value_store(struct kobject *kobj,
308					struct kobj_attribute *kattr,
309					const char *buf, size_t count,
310					struct tunable_attr_01 *tunable_attr)
311{
312	struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
313	struct wmi_method_args_32 args;
314	struct capdata01 capdata;
315	enum thermal_mode mode;
316	u32 attribute_id;
317	u32 value;
318	int ret;
319
320	ret = lwmi_om_notifier_call(&mode);
321	if (ret)
322		return ret;
323
324	if (mode != LWMI_GZ_THERMAL_MODE_CUSTOM)
325		return -EBUSY;
326
327	attribute_id =
328		FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, tunable_attr->device_id) |
329		FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, tunable_attr->feature_id) |
330		FIELD_PREP(LWMI_ATTR_MODE_ID_MASK, mode) |
331		FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, tunable_attr->type_id);
332
333	ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
334	if (ret)
335		return ret;
336
337	ret = kstrtouint(buf, 10, &value);
338	if (ret)
339		return ret;
340
341	if (value < capdata.min_value || value > capdata.max_value)
342		return -EINVAL;
343
344	args.arg0 = attribute_id;
345	args.arg1 = value;
346
347	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
348				    (unsigned char *)&args, sizeof(args), NULL);
349	if (ret)
350		return ret;
351
352	return count;
353};
354
355/**
356 * attr_current_value_show() - Get the current value of the given attribute
357 * @kobj: Pointer to the driver object.
358 * @kattr: Pointer to the attribute calling this function.
359 * @buf: The buffer to write to.
360 * @tunable_attr: The attribute to be read.
361 *
362 * Retrieves the value of the given attribute for the current smartfan profile.
363 * The current smartfan profile is retrieved from the lenovo-wmi-gamezone driver.
364 * This function is intended to be generic so it can be called from any integer
365 * attribute's "_show" function.
366 *
367 * If the WMI is success the sysfs attribute is notified.
368 *
369 * Return: Either number of characters written to buf, or an error code.
370 */
371static ssize_t attr_current_value_show(struct kobject *kobj,
372				       struct kobj_attribute *kattr, char *buf,
373				       struct tunable_attr_01 *tunable_attr)
374{
375	struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
376	struct wmi_method_args_32 args;
377	enum thermal_mode mode;
378	u32 attribute_id;
379	int retval;
380	int ret;
381
382	ret = lwmi_om_notifier_call(&mode);
383	if (ret)
384		return ret;
385
386	attribute_id =
387		FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, tunable_attr->device_id) |
388		FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, tunable_attr->feature_id) |
389		FIELD_PREP(LWMI_ATTR_MODE_ID_MASK, mode) |
390		FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, tunable_attr->type_id);
391
392	args.arg0 = attribute_id;
393
394	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
395				    (unsigned char *)&args, sizeof(args),
396				    &retval);
397	if (ret)
398		return ret;
399
400	return sysfs_emit(buf, "%d\n", retval);
401}
402
403/* Lenovo WMI Other Mode Attribute macros */
404#define __LWMI_ATTR_RO(_func, _name)                                  \
405	{                                                             \
406		.attr = { .name = __stringify(_name), .mode = 0444 }, \
407		.show = _func##_##_name##_show,                       \
408	}
409
410#define __LWMI_ATTR_RO_AS(_name, _show)                               \
411	{                                                             \
412		.attr = { .name = __stringify(_name), .mode = 0444 }, \
413		.show = _show,                                        \
414	}
415
416#define __LWMI_ATTR_RW(_func, _name) \
417	__ATTR(_name, 0644, _func##_##_name##_show, _func##_##_name##_store)
418
419/* Shows a formatted static variable */
420#define __LWMI_ATTR_SHOW_FMT(_prop, _attrname, _fmt, _val)                     \
421	static ssize_t _attrname##_##_prop##_show(                             \
422		struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
423	{                                                                      \
424		return sysfs_emit(buf, _fmt, _val);                            \
425	}                                                                      \
426	static struct kobj_attribute attr_##_attrname##_##_prop =              \
427		__LWMI_ATTR_RO(_attrname, _prop)
428
429/* Attribute current value read/write */
430#define __LWMI_TUNABLE_CURRENT_VALUE_CAP01(_attrname)                          \
431	static ssize_t _attrname##_current_value_store(                        \
432		struct kobject *kobj, struct kobj_attribute *kattr,            \
433		const char *buf, size_t count)                                 \
434	{                                                                      \
435		return attr_current_value_store(kobj, kattr, buf, count,       \
436						&_attrname);                   \
437	}                                                                      \
438	static ssize_t _attrname##_current_value_show(                         \
439		struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
440	{                                                                      \
441		return attr_current_value_show(kobj, kattr, buf, &_attrname);  \
442	}                                                                      \
443	static struct kobj_attribute attr_##_attrname##_current_value =        \
444		__LWMI_ATTR_RW(_attrname, current_value)
445
446/* Attribute property read only */
447#define __LWMI_TUNABLE_RO_CAP01(_prop, _attrname, _prop_type)                  \
448	static ssize_t _attrname##_##_prop##_show(                             \
449		struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
450	{                                                                      \
451		return attr_capdata01_show(kobj, kattr, buf, &_attrname,       \
452					   _prop_type);                        \
453	}                                                                      \
454	static struct kobj_attribute attr_##_attrname##_##_prop =              \
455		__LWMI_ATTR_RO(_attrname, _prop)
456
457#define LWMI_ATTR_GROUP_TUNABLE_CAP01(_attrname, _fsname, _dispname)      \
458	__LWMI_TUNABLE_CURRENT_VALUE_CAP01(_attrname);                    \
459	__LWMI_TUNABLE_RO_CAP01(default_value, _attrname, DEFAULT_VAL);   \
460	__LWMI_ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
461	__LWMI_TUNABLE_RO_CAP01(max_value, _attrname, MAX_VAL);           \
462	__LWMI_TUNABLE_RO_CAP01(min_value, _attrname, MIN_VAL);           \
463	__LWMI_TUNABLE_RO_CAP01(scalar_increment, _attrname, STEP_VAL);   \
464	static struct kobj_attribute attr_##_attrname##_type =            \
465		__LWMI_ATTR_RO_AS(type, int_type_show);                   \
466	static struct attribute *_attrname##_attrs[] = {                  \
467		&attr_##_attrname##_current_value.attr,                   \
468		&attr_##_attrname##_default_value.attr,                   \
469		&attr_##_attrname##_display_name.attr,                    \
470		&attr_##_attrname##_max_value.attr,                       \
471		&attr_##_attrname##_min_value.attr,                       \
472		&attr_##_attrname##_scalar_increment.attr,                \
473		&attr_##_attrname##_type.attr,                            \
474		NULL,                                                     \
475	};                                                                \
476	static const struct attribute_group _attrname##_attr_group = {    \
477		.name = _fsname, .attrs = _attrname##_attrs               \
478	}
479
480LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl, "ppt_pl1_spl",
481			      "Set the CPU sustained power limit");
482LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt, "ppt_pl2_sppt",
483			      "Set the CPU slow package power tracking limit");
484LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt, "ppt_pl3_fppt",
485			      "Set the CPU fast package power tracking limit");
486
487static struct capdata01_attr_group cd01_attr_groups[] = {
488	{ &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
489	{ &ppt_pl2_sppt_attr_group, &ppt_pl2_sppt },
490	{ &ppt_pl3_fppt_attr_group, &ppt_pl3_fppt },
491	{},
492};
493
494/**
495 * lwmi_om_fw_attr_add() - Register all firmware_attributes_class members
496 * @priv: The Other Mode driver data.
497 *
498 * Return: Either 0, or an error code.
499 */
500static int lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
501{
502	unsigned int i;
503	int err;
504
505	priv->ida_id = ida_alloc(&lwmi_om_ida, GFP_KERNEL);
506	if (priv->ida_id < 0)
507		return priv->ida_id;
508
509	priv->fw_attr_dev = device_create(&firmware_attributes_class, NULL,
510					  MKDEV(0, 0), NULL, "%s-%u",
511					  LWMI_OM_FW_ATTR_BASE_PATH,
512					  priv->ida_id);
513	if (IS_ERR(priv->fw_attr_dev)) {
514		err = PTR_ERR(priv->fw_attr_dev);
515		goto err_free_ida;
516	}
517
518	priv->fw_attr_kset = kset_create_and_add("attributes", NULL,
519						 &priv->fw_attr_dev->kobj);
520	if (!priv->fw_attr_kset) {
521		err = -ENOMEM;
522		goto err_destroy_classdev;
523	}
524
525	for (i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++) {
526		err = sysfs_create_group(&priv->fw_attr_kset->kobj,
527					 cd01_attr_groups[i].attr_group);
528		if (err)
529			goto err_remove_groups;
530
531		cd01_attr_groups[i].tunable_attr->dev = &priv->wdev->dev;
532	}
533	return 0;
534
535err_remove_groups:
536	while (i--)
537		sysfs_remove_group(&priv->fw_attr_kset->kobj,
538				   cd01_attr_groups[i].attr_group);
539
540	kset_unregister(priv->fw_attr_kset);
541
542err_destroy_classdev:
543	device_unregister(priv->fw_attr_dev);
544
545err_free_ida:
546	ida_free(&lwmi_om_ida, priv->ida_id);
547	return err;
548}
549
550/**
551 * lwmi_om_fw_attr_remove() - Unregister all capability data attribute groups
552 * @priv: the lenovo-wmi-other driver data.
553 */
554static void lwmi_om_fw_attr_remove(struct lwmi_om_priv *priv)
555{
556	for (unsigned int i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++)
557		sysfs_remove_group(&priv->fw_attr_kset->kobj,
558				   cd01_attr_groups[i].attr_group);
559
560	kset_unregister(priv->fw_attr_kset);
561	device_unregister(priv->fw_attr_dev);
562}
563
564/**
565 * lwmi_om_master_bind() - Bind all components of the other mode driver
566 * @dev: The lenovo-wmi-other driver basic device.
567 *
568 * Call component_bind_all to bind the lenovo-wmi-capdata01 driver to the
569 * lenovo-wmi-other master driver. On success, assign the capability data 01
570 * list pointer to the driver data struct for later access. This pointer
571 * is only valid while the capdata01 interface exists. Finally, register all
572 * firmware attribute groups.
573 *
574 * Return: 0 on success, or an error code.
575 */
576static int lwmi_om_master_bind(struct device *dev)
577{
578	struct lwmi_om_priv *priv = dev_get_drvdata(dev);
579	struct cd01_list *tmp_list;
580	int ret;
581
582	ret = component_bind_all(dev, &tmp_list);
583	if (ret)
584		return ret;
585
586	priv->cd01_list = tmp_list;
587	if (!priv->cd01_list)
588		return -ENODEV;
589
590	return lwmi_om_fw_attr_add(priv);
591}
592
593/**
594 * lwmi_om_master_unbind() - Unbind all components of the other mode driver
595 * @dev: The lenovo-wmi-other driver basic device
596 *
597 * Unregister all capability data attribute groups. Then call
598 * component_unbind_all to unbind the lenovo-wmi-capdata01 driver from the
599 * lenovo-wmi-other master driver. Finally, free the IDA for this device.
600 */
601static void lwmi_om_master_unbind(struct device *dev)
602{
603	struct lwmi_om_priv *priv = dev_get_drvdata(dev);
604
605	lwmi_om_fw_attr_remove(priv);
606	component_unbind_all(dev, NULL);
607}
608
609static const struct component_master_ops lwmi_om_master_ops = {
610	.bind = lwmi_om_master_bind,
611	.unbind = lwmi_om_master_unbind,
612};
613
614static int lwmi_other_probe(struct wmi_device *wdev, const void *context)
615{
616	struct component_match *master_match = NULL;
617	struct lwmi_om_priv *priv;
618
619	priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);
620	if (!priv)
621		return -ENOMEM;
622
623	priv->wdev = wdev;
624	dev_set_drvdata(&wdev->dev, priv);
625
626	component_match_add(&wdev->dev, &master_match, lwmi_cd01_match, NULL);
627	if (IS_ERR(master_match))
628		return PTR_ERR(master_match);
629
630	return component_master_add_with_match(&wdev->dev, &lwmi_om_master_ops,
631					       master_match);
632}
633
634static void lwmi_other_remove(struct wmi_device *wdev)
635{
636	struct lwmi_om_priv *priv = dev_get_drvdata(&wdev->dev);
637
638	component_master_del(&wdev->dev, &lwmi_om_master_ops);
639	ida_free(&lwmi_om_ida, priv->ida_id);
640}
641
642static const struct wmi_device_id lwmi_other_id_table[] = {
643	{ LENOVO_OTHER_MODE_GUID, NULL },
644	{}
645};
646
647static struct wmi_driver lwmi_other_driver = {
648	.driver = {
649		.name = "lenovo_wmi_other",
650		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
651	},
652	.id_table = lwmi_other_id_table,
653	.probe = lwmi_other_probe,
654	.remove = lwmi_other_remove,
655	.no_singleton = true,
656};
657
658module_wmi_driver(lwmi_other_driver);
659
660MODULE_IMPORT_NS("LENOVO_WMI_CD01");
661MODULE_IMPORT_NS("LENOVO_WMI_HELPERS");
662MODULE_DEVICE_TABLE(wmi, lwmi_other_id_table);
663MODULE_AUTHOR("Derek J. Clark <derekjohn.clark@gmail.com>");
664MODULE_DESCRIPTION("Lenovo Other Mode WMI Driver");
665MODULE_LICENSE("GPL");