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 | static 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), name: 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(dev: &pdev->dev, base: pcim_iomap_table(pdev)[0], info); |
34 | if (IS_ERR(ptr: lpwm)) |
35 | return PTR_ERR(ptr: lpwm); |
36 | |
37 | pci_set_drvdata(pdev, data: lpwm); |
38 | |
39 | pm_runtime_put(dev: &pdev->dev); |
40 | pm_runtime_allow(dev: &pdev->dev); |
41 | |
42 | return 0; |
43 | } |
44 | |
45 | static void pwm_lpss_remove_pci(struct pci_dev *pdev) |
46 | { |
47 | pm_runtime_forbid(dev: &pdev->dev); |
48 | pm_runtime_get_sync(dev: &pdev->dev); |
49 | } |
50 | |
51 | static 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 | |
60 | static int pwm_lpss_runtime_resume_pci(struct device *dev) |
61 | { |
62 | return 0; |
63 | } |
64 | |
65 | static DEFINE_RUNTIME_DEV_PM_OPS(pwm_lpss_pci_pm, |
66 | pwm_lpss_runtime_suspend_pci, |
67 | pwm_lpss_runtime_resume_pci, |
68 | NULL); |
69 | |
70 | static 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 | }; |
82 | MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids); |
83 | |
84 | static 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 | }; |
93 | module_pci_driver(pwm_lpss_driver_pci); |
94 | |
95 | MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS" ); |
96 | MODULE_LICENSE("GPL v2" ); |
97 | MODULE_IMPORT_NS(PWM_LPSS); |
98 | |