Commit | Line | Data |
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c558e39e AS |
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> | |
f080be27 | 16 | #include <linux/pm_runtime.h> |
c558e39e AS |
17 | |
18 | #include "pwm-lpss.h" | |
19 | ||
9900073c AS |
20 | /* BayTrail */ |
21 | static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = { | |
22 | .clk_rate = 25000000, | |
23 | .npwm = 1, | |
24 | .base_unit_bits = 16, | |
25 | }; | |
26 | ||
27 | /* Braswell */ | |
28 | static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = { | |
29 | .clk_rate = 19200000, | |
30 | .npwm = 1, | |
31 | .base_unit_bits = 16, | |
32 | }; | |
33 | ||
34 | /* Broxton */ | |
35 | static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = { | |
36 | .clk_rate = 19200000, | |
37 | .npwm = 4, | |
38 | .base_unit_bits = 22, | |
b997e3ed | 39 | .bypass = true, |
9900073c AS |
40 | }; |
41 | ||
3c1460e9 AS |
42 | /* Tangier */ |
43 | static const struct pwm_lpss_boardinfo pwm_lpss_tng_info = { | |
44 | .clk_rate = 19200000, | |
45 | .npwm = 4, | |
46 | .base_unit_bits = 22, | |
47 | }; | |
48 | ||
c558e39e AS |
49 | static int pwm_lpss_probe_pci(struct pci_dev *pdev, |
50 | const struct pci_device_id *id) | |
51 | { | |
52 | const struct pwm_lpss_boardinfo *info; | |
53 | struct pwm_lpss_chip *lpwm; | |
54 | int err; | |
55 | ||
90927fe9 | 56 | err = pcim_enable_device(pdev); |
c558e39e AS |
57 | if (err < 0) |
58 | return err; | |
59 | ||
60 | info = (struct pwm_lpss_boardinfo *)id->driver_data; | |
61 | lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info); | |
62 | if (IS_ERR(lpwm)) | |
63 | return PTR_ERR(lpwm); | |
64 | ||
65 | pci_set_drvdata(pdev, lpwm); | |
f080be27 QZ |
66 | |
67 | pm_runtime_put(&pdev->dev); | |
68 | pm_runtime_allow(&pdev->dev); | |
69 | ||
c558e39e AS |
70 | return 0; |
71 | } | |
72 | ||
73 | static void pwm_lpss_remove_pci(struct pci_dev *pdev) | |
74 | { | |
75 | struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev); | |
76 | ||
f080be27 QZ |
77 | pm_runtime_forbid(&pdev->dev); |
78 | pm_runtime_get_sync(&pdev->dev); | |
79 | ||
c558e39e | 80 | pwm_lpss_remove(lpwm); |
c558e39e AS |
81 | } |
82 | ||
f080be27 QZ |
83 | #ifdef CONFIG_PM |
84 | static int pwm_lpss_runtime_suspend_pci(struct device *dev) | |
85 | { | |
86 | /* | |
87 | * The PCI core will handle transition to D3 automatically. We only | |
88 | * need to provide runtime PM hooks for that to happen. | |
89 | */ | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int pwm_lpss_runtime_resume_pci(struct device *dev) | |
94 | { | |
95 | return 0; | |
96 | } | |
97 | #endif | |
98 | ||
99 | static const struct dev_pm_ops pwm_lpss_pci_pm = { | |
100 | SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci, | |
101 | pwm_lpss_runtime_resume_pci, NULL) | |
102 | }; | |
103 | ||
c558e39e | 104 | static const struct pci_device_id pwm_lpss_pci_ids[] = { |
87219cb4 | 105 | { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info}, |
c558e39e AS |
106 | { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info}, |
107 | { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info}, | |
3c1460e9 | 108 | { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info}, |
87219cb4 | 109 | { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info}, |
c558e39e AS |
110 | { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info}, |
111 | { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info}, | |
ae252054 | 112 | { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info}, |
03f00e53 | 113 | { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info}, |
c558e39e AS |
114 | { }, |
115 | }; | |
116 | MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids); | |
117 | ||
118 | static struct pci_driver pwm_lpss_driver_pci = { | |
119 | .name = "pwm-lpss", | |
120 | .id_table = pwm_lpss_pci_ids, | |
121 | .probe = pwm_lpss_probe_pci, | |
122 | .remove = pwm_lpss_remove_pci, | |
f080be27 QZ |
123 | .driver = { |
124 | .pm = &pwm_lpss_pci_pm, | |
125 | }, | |
c558e39e AS |
126 | }; |
127 | module_pci_driver(pwm_lpss_driver_pci); | |
128 | ||
129 | MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS"); | |
130 | MODULE_LICENSE("GPL v2"); |