Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
c558e39e AS |
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 | |
c558e39e AS |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/pci.h> | |
f080be27 | 13 | #include <linux/pm_runtime.h> |
c558e39e AS |
14 | |
15 | #include "pwm-lpss.h" | |
16 | ||
9900073c AS |
17 | /* BayTrail */ |
18 | static 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 */ | |
25 | static 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 */ | |
32 | static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = { | |
33 | .clk_rate = 19200000, | |
34 | .npwm = 4, | |
35 | .base_unit_bits = 22, | |
b997e3ed | 36 | .bypass = true, |
9900073c AS |
37 | }; |
38 | ||
3c1460e9 AS |
39 | /* Tangier */ |
40 | static const struct pwm_lpss_boardinfo pwm_lpss_tng_info = { | |
41 | .clk_rate = 19200000, | |
42 | .npwm = 4, | |
43 | .base_unit_bits = 22, | |
44 | }; | |
45 | ||
c558e39e AS |
46 | static 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 | ||
90927fe9 | 53 | err = pcim_enable_device(pdev); |
c558e39e AS |
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); | |
f080be27 QZ |
63 | |
64 | pm_runtime_put(&pdev->dev); | |
65 | pm_runtime_allow(&pdev->dev); | |
66 | ||
c558e39e AS |
67 | return 0; |
68 | } | |
69 | ||
70 | static void pwm_lpss_remove_pci(struct pci_dev *pdev) | |
71 | { | |
72 | struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev); | |
73 | ||
f080be27 QZ |
74 | pm_runtime_forbid(&pdev->dev); |
75 | pm_runtime_get_sync(&pdev->dev); | |
76 | ||
c558e39e | 77 | pwm_lpss_remove(lpwm); |
c558e39e AS |
78 | } |
79 | ||
f080be27 QZ |
80 | #ifdef CONFIG_PM |
81 | static 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 | ||
90 | static int pwm_lpss_runtime_resume_pci(struct device *dev) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | #endif | |
95 | ||
96 | static 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 | ||
c558e39e | 101 | static const struct pci_device_id pwm_lpss_pci_ids[] = { |
87219cb4 | 102 | { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info}, |
c558e39e AS |
103 | { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info}, |
104 | { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info}, | |
3c1460e9 | 105 | { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info}, |
87219cb4 | 106 | { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info}, |
c558e39e AS |
107 | { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info}, |
108 | { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info}, | |
ae252054 | 109 | { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info}, |
03f00e53 | 110 | { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info}, |
c558e39e AS |
111 | { }, |
112 | }; | |
113 | MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids); | |
114 | ||
115 | static 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, | |
f080be27 QZ |
120 | .driver = { |
121 | .pm = &pwm_lpss_pci_pm, | |
122 | }, | |
c558e39e AS |
123 | }; |
124 | module_pci_driver(pwm_lpss_driver_pci); | |
125 | ||
126 | MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS"); | |
127 | MODULE_LICENSE("GPL v2"); |