1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * lenovo-ymc.c - Lenovo Yoga Mode Control driver
13 #include <linux/input/sparse-keymap.h>
15 #include "ideapad-laptop.h"
17 #define LENOVO_YMC_EVENT_GUID	"06129D99-6083-4164-81AD-F092F9D773A6"
18 #define LENOVO_YMC_QUERY_GUID	"09B0EE6E-C3FD-4243-8DA1-7911FF80BB8C"
23 static bool force;  variable
24 module_param(force, bool, 0444);
25 MODULE_PARM_DESC(force, "Force loading on boards without a convertible DMI chassis-type");
61 	struct lenovo_ymc_private *priv = dev_get_drvdata(&wdev->dev);  in lenovo_ymc_notify()
75 		dev_warn(&wdev->dev,  in lenovo_ymc_notify()
83 	if (obj->type != ACPI_TYPE_INTEGER) {  in lenovo_ymc_notify()
84 		dev_warn(&wdev->dev,  in lenovo_ymc_notify()
88 	code = obj->integer.value;  in lenovo_ymc_notify()
90 	if (!sparse_keymap_report_event(priv->input_dev, code, 1, true))  in lenovo_ymc_notify()
91 		dev_warn(&wdev->dev, "Unknown key %d pressed\n", code);  in lenovo_ymc_notify()
105 		if (force)  in lenovo_ymc_probe()
106 			dev_info(&wdev->dev, "Force loading Lenovo YMC support\n");  in lenovo_ymc_probe()
108 			return -ENODEV;  in lenovo_ymc_probe()
111 	priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);  in lenovo_ymc_probe()
113 		return -ENOMEM;  in lenovo_ymc_probe()
115 	input_dev = devm_input_allocate_device(&wdev->dev);  in lenovo_ymc_probe()
117 		return -ENOMEM;  in lenovo_ymc_probe()
119 	input_dev->name = "Lenovo Yoga Tablet Mode Control switch";  in lenovo_ymc_probe()
120 	input_dev->phys = LENOVO_YMC_EVENT_GUID "/input0";  in lenovo_ymc_probe()
121 	input_dev->id.bustype = BUS_HOST;  in lenovo_ymc_probe()
122 	input_dev->dev.parent = &wdev->dev;  in lenovo_ymc_probe()
125 		dev_err(&wdev->dev,  in lenovo_ymc_probe()
132 		dev_err(&wdev->dev,  in lenovo_ymc_probe()
137 	priv->input_dev = input_dev;  in lenovo_ymc_probe()
138 	dev_set_drvdata(&wdev->dev, priv);  in lenovo_ymc_probe()
153 		.name = "lenovo-ymc",
163 MODULE_DESCRIPTION("Lenovo Yoga Mode Control driver");