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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/* BayTrail */
18static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
19 .clk_rate = 25000000,
20 .npwm = 1,
21 .base_unit_bits = 16,
22};
23
24/* Braswell */
25static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
26 .clk_rate = 19200000,
27 .npwm = 1,
28 .base_unit_bits = 16,
29};
30
31/* Broxton */
32static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = {
33 .clk_rate = 19200000,
34 .npwm = 4,
35 .base_unit_bits = 22,
36 .bypass = true,
37};
38
39/* Tangier */
40static const struct pwm_lpss_boardinfo pwm_lpss_tng_info = {
41 .clk_rate = 19200000,
42 .npwm = 4,
43 .base_unit_bits = 22,
44};
45
46static int pwm_lpss_probe_pci(struct pci_dev *pdev,
47 const struct pci_device_id *id)
48{
49 const struct pwm_lpss_boardinfo *info;
50 struct pwm_lpss_chip *lpwm;
51 int err;
52
53 err = pcim_enable_device(pdev);
54 if (err < 0)
55 return err;
56
57 info = (struct pwm_lpss_boardinfo *)id->driver_data;
58 lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info);
59 if (IS_ERR(lpwm))
60 return PTR_ERR(lpwm);
61
62 pci_set_drvdata(pdev, lpwm);
63
64 pm_runtime_put(&pdev->dev);
65 pm_runtime_allow(&pdev->dev);
66
67 return 0;
68}
69
70static void pwm_lpss_remove_pci(struct pci_dev *pdev)
71{
72 struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
73
74 pm_runtime_forbid(&pdev->dev);
75 pm_runtime_get_sync(&pdev->dev);
76
77 pwm_lpss_remove(lpwm);
78}
79
80#ifdef CONFIG_PM
81static int pwm_lpss_runtime_suspend_pci(struct device *dev)
82{
83 /*
84 * The PCI core will handle transition to D3 automatically. We only
85 * need to provide runtime PM hooks for that to happen.
86 */
87 return 0;
88}
89
90static int pwm_lpss_runtime_resume_pci(struct device *dev)
91{
92 return 0;
93}
94#endif
95
96static const struct dev_pm_ops pwm_lpss_pci_pm = {
97 SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci,
98 pwm_lpss_runtime_resume_pci, NULL)
99};
100
101static const struct pci_device_id pwm_lpss_pci_ids[] = {
102 { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
103 { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
104 { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
105 { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},
106 { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
107 { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
108 { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
109 { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},
110 { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
111 { },
112};
113MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
114
115static struct pci_driver pwm_lpss_driver_pci = {
116 .name = "pwm-lpss",
117 .id_table = pwm_lpss_pci_ids,
118 .probe = pwm_lpss_probe_pci,
119 .remove = pwm_lpss_remove_pci,
120 .driver = {
121 .pm = &pwm_lpss_pci_pm,
122 },
123};
124module_pci_driver(pwm_lpss_driver_pci);
125
126MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
127MODULE_LICENSE("GPL v2");
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");