1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * INT3401 processor thermal device
4  * Copyright (c) 2020, Intel Corporation.
5  */
6 #include <linux/acpi.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/thermal.h>
11 
12 #include "int340x_thermal_zone.h"
13 #include "processor_thermal_device.h"
14 
15 static const struct acpi_device_id int3401_device_ids[] = {
16 	{"INT3401", 0},
17 	{"", 0},
18 };
19 MODULE_DEVICE_TABLE(acpi, int3401_device_ids);
20 
21 static int int3401_add(struct platform_device *pdev)
22 {
23 	struct proc_thermal_device *proc_priv;
24 	int ret;
25 
26 	proc_priv = devm_kzalloc(&pdev->dev, sizeof(*proc_priv), GFP_KERNEL);
27 	if (!proc_priv)
28 		return -ENOMEM;
29 
30 	ret = proc_thermal_add(&pdev->dev, proc_priv);
31 	if (ret)
32 		return ret;
33 
34 	platform_set_drvdata(pdev, proc_priv);
35 
36 	return ret;
37 }
38 
39 static int int3401_remove(struct platform_device *pdev)
40 {
41 	proc_thermal_remove(platform_get_drvdata(pdev));
42 
43 	return 0;
44 }
45 
46 #ifdef CONFIG_PM_SLEEP
47 static int int3401_thermal_suspend(struct device *dev)
48 {
49 	return proc_thermal_suspend(dev);
50 }
51 static int int3401_thermal_resume(struct device *dev)
52 {
53 	return proc_thermal_resume(dev);
54 }
55 #else
56 #define int3401_thermal_suspend NULL
57 #define int3401_thermal_resume NULL
58 #endif
59 
60 static SIMPLE_DEV_PM_OPS(int3401_proc_thermal_pm, int3401_thermal_suspend,
61 			 int3401_thermal_resume);
62 
63 static struct platform_driver int3401_driver = {
64 	.probe = int3401_add,
65 	.remove = int3401_remove,
66 	.driver = {
67 		.name = "int3401 thermal",
68 		.acpi_match_table = int3401_device_ids,
69 		.pm = &int3401_proc_thermal_pm,
70 	},
71 };
72 
73 static int __init proc_thermal_init(void)
74 {
75 	return platform_driver_register(&int3401_driver);
76 }
77 
78 static void __exit proc_thermal_exit(void)
79 {
80 	platform_driver_unregister(&int3401_driver);
81 }
82 
83 module_init(proc_thermal_init);
84 module_exit(proc_thermal_exit);
85 
86 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
87 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
88 MODULE_LICENSE("GPL v2");
89