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
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	void __iomem *io_base;
22	struct pwm_chip *chip;
23	int err;
24
25	err = pcim_enable_device(pdev);
26	if (err < 0)
27		return err;
28
29	io_base = pcim_iomap_region(pdev, 0, "pwm-lpss");
30	if (IS_ERR(io_base))
31		return PTR_ERR(io_base);
32
33	info = (struct pwm_lpss_boardinfo *)id->driver_data;
34	chip = devm_pwm_lpss_probe(&pdev->dev, io_base, info);
35	if (IS_ERR(chip))
36		return PTR_ERR(chip);
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	pm_runtime_forbid(&pdev->dev);
47	pm_runtime_get_sync(&pdev->dev);
48}
49
50static const struct pci_device_id pwm_lpss_pci_ids[] = {
51	{ PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
52	{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
53	{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
54	{ PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},
55	{ PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
56	{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
57	{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
58	{ PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},
59	{ PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
60	{ },
61};
62MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
63
64static struct pci_driver pwm_lpss_driver_pci = {
65	.name = "pwm-lpss",
66	.id_table = pwm_lpss_pci_ids,
67	.probe = pwm_lpss_probe_pci,
68	.remove = pwm_lpss_remove_pci,
69};
70module_pci_driver(pwm_lpss_driver_pci);
71
72MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
73MODULE_LICENSE("GPL v2");
74MODULE_IMPORT_NS("PWM_LPSS");