LXR linux/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
  21static 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
  47static 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
  55static 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};
  61MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
  62
  63static 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};
  71module_platform_driver(pwm_lpss_driver_platform);
  72
  73MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
  74MODULE_LICENSE("GPL v2");
  75MODULE_ALIAS("platform:pwm-lpss");
  76