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
17static 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), name: 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(dev: &pdev->dev, base: pcim_iomap_table(pdev)[0], info);
34 if (IS_ERR(ptr: chip))
35 return PTR_ERR(ptr: chip);
36
37 pm_runtime_put(dev: &pdev->dev);
38 pm_runtime_allow(dev: &pdev->dev);
39
40 return 0;
41}
42
43static void pwm_lpss_remove_pci(struct pci_dev *pdev)
44{
45 pm_runtime_forbid(dev: &pdev->dev);
46 pm_runtime_get_sync(dev: &pdev->dev);
47}
48
49static int pwm_lpss_runtime_suspend_pci(struct device *dev)
50{
51 /*
52 * The PCI core will handle transition to D3 automatically. We only
53 * need to provide runtime PM hooks for that to happen.
54 */
55 return 0;
56}
57
58static int pwm_lpss_runtime_resume_pci(struct device *dev)
59{
60 return 0;
61}
62
63static DEFINE_RUNTIME_DEV_PM_OPS(pwm_lpss_pci_pm,
64 pwm_lpss_runtime_suspend_pci,
65 pwm_lpss_runtime_resume_pci,
66 NULL);
67
68static const struct pci_device_id pwm_lpss_pci_ids[] = {
69 { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
70 { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
71 { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
72 { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},
73 { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
74 { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
75 { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
76 { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},
77 { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
78 { },
79};
80MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
81
82static struct pci_driver pwm_lpss_driver_pci = {
83 .name = "pwm-lpss",
84 .id_table = pwm_lpss_pci_ids,
85 .probe = pwm_lpss_probe_pci,
86 .remove = pwm_lpss_remove_pci,
87 .driver = {
88 .pm = pm_ptr(&pwm_lpss_pci_pm),
89 },
90};
91module_pci_driver(pwm_lpss_driver_pci);
92
93MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
94MODULE_LICENSE("GPL v2");
95MODULE_IMPORT_NS(PWM_LPSS);
96

source code of linux/drivers/pwm/pwm-lpss-pci.c