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
pwm_lpss_probe_platform(struct platform_device * pdev)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
pwm_lpss_remove_platform(struct platform_device * pdev)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