drivers/pwm/pwm-lpss-pci.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel Low Power Subsystem PWM controller PCI driver
   4  *
   5  * Copyright (C) 2014, Intel Corporation
   6  *
   7  * Derived from the original pwm-lpss.c
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/pci.h>
  13 #include <linux/pm_runtime.h>
  14
  15 #include "pwm-lpss.h"
  16
  17 static int pwm_lpss_probe_pci(struct pci_dev *pdev,
  18                               const struct pci_device_id *id)
  19 {
  20         const struct pwm_lpss_boardinfo *info;
  21         struct pwm_chip *chip;
  22         int err;
  23
  24         err = pcim_enable_device(pdev);
  25         if (err < 0)
  26                 return err;
  27
  28         err = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
  29         if (err)
  30                 return err;
  31
  32         info = (struct pwm_lpss_boardinfo *)id->driver_data;
  33         chip = devm_pwm_lpss_probe(&pdev->dev, pcim_iomap_table(pdev)[0], info);
  34         if (IS_ERR(chip))
  35                 return PTR_ERR(chip);
  36
  37         pm_runtime_put(&pdev->dev);
  38         pm_runtime_allow(&pdev->dev);
  39
  40         return 0;
  41 }
  42
  43 static void pwm_lpss_remove_pci(struct pci_dev *pdev)
  44 {
  45         pm_runtime_forbid(&pdev->dev);
  46         pm_runtime_get_sync(&pdev->dev);
  47 }
  48
  49 static const struct pci_device_id pwm_lpss_pci_ids[] = {
  50         { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
  51         { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
  52         { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
  53         { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},
  54         { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
  55         { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
  56         { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
  57         { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},
  58         { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
  59         { },
  60 };
  61 MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
  62
  63 static struct pci_driver pwm_lpss_driver_pci = {
  64         .name = "pwm-lpss",
  65         .id_table = pwm_lpss_pci_ids,
  66         .probe = pwm_lpss_probe_pci,
  67         .remove = pwm_lpss_remove_pci,
  68 };
  69 module_pci_driver(pwm_lpss_driver_pci);
  70
  71 MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
  72 MODULE_LICENSE("GPL v2");
  73 MODULE_IMPORT_NS("PWM_LPSS");