drivers/pwm/pwm-lpss-platform.c

   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 SIMPLE_DEV_PM_OPS(pwm_lpss_platform_pm_ops,
  56                          pwm_lpss_suspend,
  57                          pwm_lpss_resume);
  58
  59 static const struct acpi_device_id pwm_lpss_acpi_match[] = {
  60         { "80860F09", (unsigned long)&pwm_lpss_byt_info },
  61         { "80862288", (unsigned long)&pwm_lpss_bsw_info },
  62         { "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
  63         { },
  64 };
  65 MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
  66
  67 static struct platform_driver pwm_lpss_driver_platform = {
  68         .driver = {
  69                 .name = "pwm-lpss",
  70                 .acpi_match_table = pwm_lpss_acpi_match,
  71                 .pm = &pwm_lpss_platform_pm_ops,
  72         },
  73         .probe = pwm_lpss_probe_platform,
  74         .remove = pwm_lpss_remove_platform,
  75 };
  76 module_platform_driver(pwm_lpss_driver_platform);
  77
  78 MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
  79 MODULE_LICENSE("GPL v2");
  80 MODULE_ALIAS("platform:pwm-lpss");