// SPDX-License-Identifier: GPL-2.0-only

  /*
   * Intel Low Power Subsystem PWM controller PCI driver
   *
   * Copyright (C) 2014, Intel Corporation
   *
   * Derived from the original pwm-lpss.c

   */
  
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/pci.h>

  #include <linux/pm_runtime.h>

  
  #include "pwm-lpss.h"

  /* BayTrail */
  static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
  	.clk_rate = 25000000,
  	.npwm = 1,
  	.base_unit_bits = 16,
  };
  
  /* Braswell */
  static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
  	.clk_rate = 19200000,
  	.npwm = 1,
  	.base_unit_bits = 16,
  };
  
  /* Broxton */
  static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = {
  	.clk_rate = 19200000,
  	.npwm = 4,
  	.base_unit_bits = 22,

  	.bypass = true,

  };

  /* Tangier */
  static const struct pwm_lpss_boardinfo pwm_lpss_tng_info = {
  	.clk_rate = 19200000,
  	.npwm = 4,
  	.base_unit_bits = 22,
  };

  static int pwm_lpss_probe_pci(struct pci_dev *pdev,
  			      const struct pci_device_id *id)
  {
  	const struct pwm_lpss_boardinfo *info;
  	struct pwm_lpss_chip *lpwm;
  	int err;

  	err = pcim_enable_device(pdev);

  	if (err < 0)
  		return err;
  
  	info = (struct pwm_lpss_boardinfo *)id->driver_data;
  	lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info);
  	if (IS_ERR(lpwm))
  		return PTR_ERR(lpwm);
  
  	pci_set_drvdata(pdev, lpwm);

  
  	pm_runtime_put(&pdev->dev);
  	pm_runtime_allow(&pdev->dev);

  	return 0;
  }
  
  static void pwm_lpss_remove_pci(struct pci_dev *pdev)
  {
  	struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);

  	pm_runtime_forbid(&pdev->dev);
  	pm_runtime_get_sync(&pdev->dev);

  	pwm_lpss_remove(lpwm);

  }

  #ifdef CONFIG_PM
  static int pwm_lpss_runtime_suspend_pci(struct device *dev)
  {
  	/*
  	 * The PCI core will handle transition to D3 automatically. We only
  	 * need to provide runtime PM hooks for that to happen.
  	 */
  	return 0;
  }
  
  static int pwm_lpss_runtime_resume_pci(struct device *dev)
  {
  	return 0;
  }
  #endif
  
  static const struct dev_pm_ops pwm_lpss_pci_pm = {
  	SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci,
  			   pwm_lpss_runtime_resume_pci, NULL)
  };

  static const struct pci_device_id pwm_lpss_pci_ids[] = {

  	{ PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},

  	{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
  	{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},

  	{ PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},

  	{ PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},

  	{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
  	{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},

  	{ PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},

  	{ PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},

  	{ },
  };
  MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
  
  static struct pci_driver pwm_lpss_driver_pci = {
  	.name = "pwm-lpss",
  	.id_table = pwm_lpss_pci_ids,
  	.probe = pwm_lpss_probe_pci,
  	.remove = pwm_lpss_remove_pci,

  	.driver = {
  		.pm = &pwm_lpss_pci_pm,
  	},

  };
  module_pci_driver(pwm_lpss_driver_pci);
  
  MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
  MODULE_LICENSE("GPL v2");