Loading...
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, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
80 { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
81 { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
82 { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
83 { },
84};
85MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
86
87static struct pci_driver pwm_lpss_driver_pci = {
88 .name = "pwm-lpss",
89 .id_table = pwm_lpss_pci_ids,
90 .probe = pwm_lpss_probe_pci,
91 .remove = pwm_lpss_remove_pci,
92 .driver = {
93 .pm = &pwm_lpss_pci_pm,
94 },
95};
96module_pci_driver(pwm_lpss_driver_pci);
97
98MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
99MODULE_LICENSE("GPL v2");
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_lpss_chip *lpwm;
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 lpwm = devm_pwm_lpss_probe(&pdev->dev, pcim_iomap_table(pdev)[0], info);
34 if (IS_ERR(lpwm))
35 return PTR_ERR(lpwm);
36
37 pci_set_drvdata(pdev, lpwm);
38
39 pm_runtime_put(&pdev->dev);
40 pm_runtime_allow(&pdev->dev);
41
42 return 0;
43}
44
45static void pwm_lpss_remove_pci(struct pci_dev *pdev)
46{
47 pm_runtime_forbid(&pdev->dev);
48 pm_runtime_get_sync(&pdev->dev);
49}
50
51static int pwm_lpss_runtime_suspend_pci(struct device *dev)
52{
53 /*
54 * The PCI core will handle transition to D3 automatically. We only
55 * need to provide runtime PM hooks for that to happen.
56 */
57 return 0;
58}
59
60static int pwm_lpss_runtime_resume_pci(struct device *dev)
61{
62 return 0;
63}
64
65static DEFINE_RUNTIME_DEV_PM_OPS(pwm_lpss_pci_pm,
66 pwm_lpss_runtime_suspend_pci,
67 pwm_lpss_runtime_resume_pci,
68 NULL);
69
70static const struct pci_device_id pwm_lpss_pci_ids[] = {
71 { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
72 { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
73 { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
74 { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},
75 { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
76 { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
77 { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
78 { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},
79 { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
80 { },
81};
82MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
83
84static struct pci_driver pwm_lpss_driver_pci = {
85 .name = "pwm-lpss",
86 .id_table = pwm_lpss_pci_ids,
87 .probe = pwm_lpss_probe_pci,
88 .remove = pwm_lpss_remove_pci,
89 .driver = {
90 .pm = pm_ptr(&pwm_lpss_pci_pm),
91 },
92};
93module_pci_driver(pwm_lpss_driver_pci);
94
95MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
96MODULE_LICENSE("GPL v2");
97MODULE_IMPORT_NS(PWM_LPSS);