1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/input.h>
23 MODULE_PARM_DESC(use_low_level_irq, "Use low-level triggered IRQ instead of edge triggered");
30 	bool autorepeat;  member
52  * Some 2-in-1s which use the soc_button_array driver have this ugly issue in
53  * their DSDT where the _LID method modifies the irq-type settings of the GPIOs
57  * problematic because when re-enabling the irq, which happens whenever _LID
59  * irq-type to IRQ_TYPE_LEVEL_LOW. Where as the gpio-keys driver programs the
61  * To work around this we don't set gpio_keys_button.gpio on these 2-in-1s,
69 		 * Acer Switch 10 SW5-012. _LID method messes with home- and
70 		 * power-button GPIO IRQ settings. When (re-)enabling the irq
72 		 * ones, leading to an irq-type of IRQ_TYPE_LEVEL_LOW |
77 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"),
81 		/* Acer Switch V 10 SW5-017, same issue as Acer Switch 10 SW5-012. */
84 			DMI_MATCH(DMI_PRODUCT_NAME, "SW5-017"),
89 		 * Acer One S1003. _LID method messes with power-button GPIO
90 		 * IRQ settings, leading to a non working power-button.
99 		 * Lenovo Yoga Tab2 1051F/1051L, something messes with the home-button
100 		 * IRQ settings, leading to a non working home-button.
120 		 * required by the lenovo-yogabook driver.
125 			DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
155 			 bool autorepeat)  in soc_button_device_create()  argument
162 	int invalid_acpi_index = -1;  in soc_button_device_create()
166 	for (info = button_info; info->name; info++)  in soc_button_device_create()
167 		if (info->autorepeat == autorepeat)  in soc_button_device_create()
170 	gpio_keys_pdata = devm_kzalloc(&pdev->dev,  in soc_button_device_create()
175 		return ERR_PTR(-ENOMEM);  in soc_button_device_create()
182 		invalid_acpi_index = (long)dmi_id->driver_data;  in soc_button_device_create()
184 	for (info = button_info; info->name; info++) {  in soc_button_device_create()
185 		if (info->autorepeat != autorepeat)  in soc_button_device_create()
188 		if (info->acpi_index == invalid_acpi_index)  in soc_button_device_create()
191 		error = soc_button_lookup_gpio(&pdev->dev, info->acpi_index, &gpio, &irq);  in soc_button_device_create()
195 			 * ignore -EPROBE_DEFER errors here. On some devices  in soc_button_device_create()
202 			 * show up, therefore we ignore -EPROBE_DEFER.  in soc_button_device_create()
208 		if (!autorepeat && (use_low_level_irq ||  in soc_button_device_create()
212 			gpio_keys[n_buttons].gpio = -ENOENT;  in soc_button_device_create()
217 		gpio_keys[n_buttons].type = info->event_type;  in soc_button_device_create()
218 		gpio_keys[n_buttons].code = info->event_code;  in soc_button_device_create()
219 		gpio_keys[n_buttons].active_low = info->active_low;  in soc_button_device_create()
220 		gpio_keys[n_buttons].desc = info->name;  in soc_button_device_create()
221 		gpio_keys[n_buttons].wakeup = info->wakeup;  in soc_button_device_create()
228 		error = -ENODEV;  in soc_button_device_create()
232 	gpio_keys_pdata->buttons = gpio_keys;  in soc_button_device_create()
233 	gpio_keys_pdata->nbuttons = n_buttons;  in soc_button_device_create()
234 	gpio_keys_pdata->rep = autorepeat;  in soc_button_device_create()
236 	pd = platform_device_register_resndata(&pdev->dev, "gpio-keys",  in soc_button_device_create()
242 		dev_err(&pdev->dev,  in soc_button_device_create()
243 			"failed registering gpio-keys: %d\n", error);  in soc_button_device_create()
250 	devm_kfree(&pdev->dev, gpio_keys_pdata);  in soc_button_device_create()
256 	if (obj->type != ACPI_TYPE_INTEGER)  in soc_button_get_acpi_object_int()
257 		return -1;  in soc_button_get_acpi_object_int()
259 	return obj->integer.value;  in soc_button_get_acpi_object_int()
270 	if (desc->type != ACPI_TYPE_PACKAGE ||  in soc_button_parse_btn_desc()
271 	    desc->package.count != 5 ||  in soc_button_parse_btn_desc()
273 	    soc_button_get_acpi_object_int(&desc->package.elements[0]) != 1 ||  in soc_button_parse_btn_desc()
275 	    soc_button_get_acpi_object_int(&desc->package.elements[2]) !=  in soc_button_parse_btn_desc()
278 		return -ENODEV;  in soc_button_parse_btn_desc()
281 	info->event_type = EV_KEY;  in soc_button_parse_btn_desc()
282 	info->active_low = true;  in soc_button_parse_btn_desc()
283 	info->acpi_index =  in soc_button_parse_btn_desc()
284 		soc_button_get_acpi_object_int(&desc->package.elements[1]);  in soc_button_parse_btn_desc()
285 	upage = soc_button_get_acpi_object_int(&desc->package.elements[3]);  in soc_button_parse_btn_desc()
286 	usage = soc_button_get_acpi_object_int(&desc->package.elements[4]);  in soc_button_parse_btn_desc()
289 	 * The UUID: fa6bd625-9ce8-470d-a2c7-b3ca36c4282e descriptors use HID  in soc_button_parse_btn_desc()
292 	 * input reports and some buttons should generate wakeups where as  in soc_button_parse_btn_desc()
299 		info->name = "power";  in soc_button_parse_btn_desc()
300 		info->event_code = KEY_POWER;  in soc_button_parse_btn_desc()
301 		info->wakeup = true;  in soc_button_parse_btn_desc()
303 		info->name = "airplane mode switch";  in soc_button_parse_btn_desc()
304 		info->event_type = EV_SW;  in soc_button_parse_btn_desc()
305 		info->event_code = SW_RFKILL_ALL;  in soc_button_parse_btn_desc()
306 		info->active_low = false;  in soc_button_parse_btn_desc()
308 		info->name = "rotation lock switch";  in soc_button_parse_btn_desc()
309 		info->event_type = EV_SW;  in soc_button_parse_btn_desc()
310 		info->event_code = SW_ROTATE_LOCK;  in soc_button_parse_btn_desc()
312 		info->name = "home";  in soc_button_parse_btn_desc()
313 		info->event_code = KEY_LEFTMETA;  in soc_button_parse_btn_desc()
314 		info->wakeup = true;  in soc_button_parse_btn_desc()
316 		info->name = "volume_up";  in soc_button_parse_btn_desc()
317 		info->event_code = KEY_VOLUMEUP;  in soc_button_parse_btn_desc()
318 		info->autorepeat = true;  in soc_button_parse_btn_desc()
320 		info->name = "volume_down";  in soc_button_parse_btn_desc()
321 		info->event_code = KEY_VOLUMEDOWN;  in soc_button_parse_btn_desc()
322 		info->autorepeat = true;  in soc_button_parse_btn_desc()
325 			 info->acpi_index, upage, usage);  in soc_button_parse_btn_desc()
326 		info->name = "unknown";  in soc_button_parse_btn_desc()
327 		info->event_code = KEY_RESERVED;  in soc_button_parse_btn_desc()
333 /* ACPI0011 _DSD btns descriptors UUID: fa6bd625-9ce8-470d-a2c7-b3ca36c4282e */
346 	int i, btn, collection_uid = -1;  in soc_button_get_button_info()
352 		return ERR_PTR(-ENODEV);  in soc_button_get_button_info()
357 	for (i = 0; (i + 1) < desc->package.count; i += 2) {  in soc_button_get_button_info()
358 		uuid = &desc->package.elements[i];  in soc_button_get_button_info()
360 		if (uuid->type != ACPI_TYPE_BUFFER ||  in soc_button_get_button_info()
361 		    uuid->buffer.length != 16 ||  in soc_button_get_button_info()
362 		    desc->package.elements[i + 1].type != ACPI_TYPE_PACKAGE) {  in soc_button_get_button_info()
366 		if (memcmp(uuid->buffer.pointer, btns_desc_uuid, 16) == 0) {  in soc_button_get_button_info()
367 			btns_desc = &desc->package.elements[i + 1];  in soc_button_get_button_info()
374 		button_info = ERR_PTR(-ENODEV);  in soc_button_get_button_info()
379 	el0 = &btns_desc->package.elements[0];  in soc_button_get_button_info()
380 	if (el0->type == ACPI_TYPE_PACKAGE &&  in soc_button_get_button_info()
381 	    el0->package.count == 5 &&  in soc_button_get_button_info()
383 	    soc_button_get_acpi_object_int(&el0->package.elements[0]) == 0 &&  in soc_button_get_button_info()
385 	    soc_button_get_acpi_object_int(&el0->package.elements[2]) == 0) {  in soc_button_get_button_info()
387 						&el0->package.elements[1]);  in soc_button_get_button_info()
389 	if (collection_uid == -1) {  in soc_button_get_button_info()
391 		button_info = ERR_PTR(-ENODEV);  in soc_button_get_button_info()
395 	/* There are package.count - 1 buttons + 1 terminating empty entry */  in soc_button_get_button_info()
396 	button_info = devm_kcalloc(dev, btns_desc->package.count,  in soc_button_get_button_info()
399 		button_info = ERR_PTR(-ENOMEM);  in soc_button_get_button_info()
404 	for (i = 1, btn = 0; i < btns_desc->package.count; i++, btn++) {  in soc_button_get_button_info()
406 					      &btns_desc->package.elements[i],  in soc_button_get_button_info()
409 			button_info = ERR_PTR(-ENODEV);  in soc_button_get_button_info()
426 		if (priv->children[i])  in soc_button_remove()
427 			platform_device_unregister(priv->children[i]);  in soc_button_remove()
432 	struct device *dev = &pdev->dev;  in soc_button_probe()
441 	if (device_data && device_data->check) {  in soc_button_probe()
442 		error = device_data->check(dev);  in soc_button_probe()
447 	if (device_data && device_data->button_info) {  in soc_button_probe()
448 		button_info = device_data->button_info;  in soc_button_probe()
457 		dev_dbg(dev, "no GPIO attached, ignoring...\n");  in soc_button_probe()
458 		return -ENODEV;  in soc_button_probe()
463 		return -ENOMEM;  in soc_button_probe()
471 			if (error != -ENODEV) {  in soc_button_probe()
478 		priv->children[i] = pd;  in soc_button_probe()
481 	if (!priv->children[0] && !priv->children[1])  in soc_button_probe()
482 		return -ENODEV;  in soc_button_probe()
484 	if (!device_data || !device_data->button_info)  in soc_button_probe()
519  * the PNP0C40 info except that the home button is active-high.
565 		oem_platform_rev = result->integer.value;  in soc_device_check_MSHW0040()
575 		return -ENODEV;  in soc_device_check_MSHW0040()
623 MODULE_DESCRIPTION("Windows-compatible SoC Button Array driver");