1/*
  2 * Intel Low Power Subsystem PWM controller PCI 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/kernel.h>
 14#include <linux/module.h>
 15#include <linux/pci.h>
 16#include <linux/pm_runtime.h>
 17
 18#include "pwm-lpss.h"
 19
 20static int pwm_lpss_probe_pci(struct pci_dev *pdev,
 21			      const struct pci_device_id *id)
 22{
 23	const struct pwm_lpss_boardinfo *info;
 24	struct pwm_lpss_chip *lpwm;
 25	int err;
 26
 27	err = pcim_enable_device(pdev);
 28	if (err < 0)
 29		return err;
 30
 31	info = (struct pwm_lpss_boardinfo *)id->driver_data;
 32	lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info);
 33	if (IS_ERR(lpwm))
 34		return PTR_ERR(lpwm);
 35
 36	pci_set_drvdata(pdev, lpwm);
 37
 38	pm_runtime_put(&pdev->dev);
 39	pm_runtime_allow(&pdev->dev);
 40
 41	return 0;
 42}
 43
 44static void pwm_lpss_remove_pci(struct pci_dev *pdev)
 45{
 46	struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
 47
 48	pm_runtime_forbid(&pdev->dev);
 49	pm_runtime_get_sync(&pdev->dev);
 50
 51	pwm_lpss_remove(lpwm);
 52}
 53
 54#ifdef CONFIG_PM
 55static int pwm_lpss_runtime_suspend_pci(struct device *dev)
 56{
 57	/*
 58	 * The PCI core will handle transition to D3 automatically. We only
 59	 * need to provide runtime PM hooks for that to happen.
 60	 */
 61	return 0;
 62}
 63
 64static int pwm_lpss_runtime_resume_pci(struct device *dev)
 65{
 66	return 0;
 67}
 68#endif
 69
 70static const struct dev_pm_ops pwm_lpss_pci_pm = {
 71	SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci,
 72			   pwm_lpss_runtime_resume_pci, NULL)
 73};
 74
 75static const struct pci_device_id pwm_lpss_pci_ids[] = {
 76	{ PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
 77	{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
 78	{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
 79	{ PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_bxt_info},
 80	{ PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
 81	{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
 82	{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
 83	{ PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
 84	{ },
 85};
 86MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
 87
 88static struct pci_driver pwm_lpss_driver_pci = {
 89	.name = "pwm-lpss",
 90	.id_table = pwm_lpss_pci_ids,
 91	.probe = pwm_lpss_probe_pci,
 92	.remove = pwm_lpss_remove_pci,
 93	.driver = {
 94		.pm = &pwm_lpss_pci_pm,
 95	},
 96};
 97module_pci_driver(pwm_lpss_driver_pci);
 98
 99MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
100MODULE_LICENSE("GPL v2");