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
pwm_lpss_probe_pci(struct pci_dev * pdev,const struct pci_device_id * id)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 void __iomem *io_base;
22 struct pwm_chip *chip;
23 int err;
24
25 err = pcim_enable_device(pdev);
26 if (err < 0)
27 return err;
28
29 io_base = pcim_iomap_region(pdev, 0, "pwm-lpss");
30 if (IS_ERR(io_base))
31 return PTR_ERR(io_base);
32
33 info = (struct pwm_lpss_boardinfo *)id->driver_data;
34 chip = devm_pwm_lpss_probe(&pdev->dev, io_base, info);
35 if (IS_ERR(chip))
36 return PTR_ERR(chip);
37
38 pm_runtime_put(&pdev->dev);
39 pm_runtime_allow(&pdev->dev);
40
41 return 0;
42 }
43
pwm_lpss_remove_pci(struct pci_dev * pdev)44 static void pwm_lpss_remove_pci(struct pci_dev *pdev)
45 {
46 pm_runtime_forbid(&pdev->dev);
47 pm_runtime_get_sync(&pdev->dev);
48 }
49
50 static const struct pci_device_id pwm_lpss_pci_ids[] = {
51 { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
52 { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
53 { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
54 { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info},
55 { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
56 { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
57 { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
58 { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info},
59 { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
60 { },
61 };
62 MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
63
64 static struct pci_driver pwm_lpss_driver_pci = {
65 .name = "pwm-lpss",
66 .id_table = pwm_lpss_pci_ids,
67 .probe = pwm_lpss_probe_pci,
68 .remove = pwm_lpss_remove_pci,
69 };
70 module_pci_driver(pwm_lpss_driver_pci);
71
72 MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
73 MODULE_LICENSE("GPL v2");
74 MODULE_IMPORT_NS("PWM_LPSS");
75