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
  18 #include "pwm-lpss.h"
  19
  20 static int pwm_lpss_probe_platform(struct platform_device *pdev)
  21 {
  22         const struct pwm_lpss_boardinfo *info;
  23         const struct acpi_device_id *id;
  24         struct pwm_lpss_chip *lpwm;
  25         struct resource *r;
  26
  27         id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
  28         if (!id)
  29                 return -ENODEV;
  30
  31         info = (const struct pwm_lpss_boardinfo *)id->driver_data;
  32         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  33
  34         lpwm = pwm_lpss_probe(&pdev->dev, r, info);
  35         if (IS_ERR(lpwm))
  36                 return PTR_ERR(lpwm);
  37
  38         platform_set_drvdata(pdev, lpwm);
  39         return 0;
  40 }
  41
  42 static int pwm_lpss_remove_platform(struct platform_device *pdev)
  43 {
  44         struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
  45
  46         return pwm_lpss_remove(lpwm);
  47 }
  48
  49 static const struct acpi_device_id pwm_lpss_acpi_match[] = {
  50         { "80860F09", (unsigned long)&pwm_lpss_byt_info },
  51         { "80862288", (unsigned long)&pwm_lpss_bsw_info },
  52         { "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
  53         { },
  54 };
  55 MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
  56
  57 static struct platform_driver pwm_lpss_driver_platform = {
  58         .driver = {
  59                 .name = "pwm-lpss",
  60                 .acpi_match_table = pwm_lpss_acpi_match,
  61         },
  62         .probe = pwm_lpss_probe_platform,
  63         .remove = pwm_lpss_remove_platform,
  64 };
  65 module_platform_driver(pwm_lpss_driver_platform);
  66
  67 MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
  68 MODULE_LICENSE("GPL v2");
  69 MODULE_ALIAS("platform:pwm-lpss");