1 /*
2  * Intel Low Power Subsystem PWM controller driver
3  *
4  * Copyright (C) 2014, Intel Corporation
5  *
6  * Derived from the original pwm-lpss.c
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 
13 #include <linux/acpi.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 
19 #include "pwm-lpss.h"
20 
21 static int pwm_lpss_probe_platform(struct platform_device *pdev)
22 {
23 	const struct pwm_lpss_boardinfo *info;
24 	const struct acpi_device_id *id;
25 	struct pwm_lpss_chip *lpwm;
26 	struct resource *r;
27 
28 	id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
29 	if (!id)
30 		return -ENODEV;
31 
32 	info = (const struct pwm_lpss_boardinfo *)id->driver_data;
33 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
34 
35 	lpwm = pwm_lpss_probe(&pdev->dev, r, info);
36 	if (IS_ERR(lpwm))
37 		return PTR_ERR(lpwm);
38 
39 	platform_set_drvdata(pdev, lpwm);
40 
41 	pm_runtime_set_active(&pdev->dev);
42 	pm_runtime_enable(&pdev->dev);
43 
44 	return 0;
45 }
46 
47 static int pwm_lpss_remove_platform(struct platform_device *pdev)
48 {
49 	struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
50 
51 	pm_runtime_disable(&pdev->dev);
52 	return pwm_lpss_remove(lpwm);
53 }
54 
55 static const struct acpi_device_id pwm_lpss_acpi_match[] = {
56 	{ "80860F09", (unsigned long)&pwm_lpss_byt_info },
57 	{ "80862288", (unsigned long)&pwm_lpss_bsw_info },
58 	{ "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
59 	{ },
60 };
61 MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
62 
63 static struct platform_driver pwm_lpss_driver_platform = {
64 	.driver = {
65 		.name = "pwm-lpss",
66 		.acpi_match_table = pwm_lpss_acpi_match,
67 	},
68 	.probe = pwm_lpss_probe_platform,
69 	.remove = pwm_lpss_remove_platform,
70 };
71 module_platform_driver(pwm_lpss_driver_platform);
72 
73 MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
74 MODULE_LICENSE("GPL v2");
75 MODULE_ALIAS("platform:pwm-lpss");
76