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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// 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), 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
43static 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
49static 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};
61MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
62
63static 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};
69module_pci_driver(pwm_lpss_driver_pci);
70
71MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
72MODULE_LICENSE("GPL v2");
73MODULE_IMPORT_NS("PWM_LPSS");