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c558e39e AS |
1 | /* |
2 | * Intel Low Power Subsystem PWM controller 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/acpi.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/platform_device.h> | |
f080be27 | 17 | #include <linux/pm_runtime.h> |
c558e39e AS |
18 | |
19 | #include "pwm-lpss.h" | |
20 | ||
9900073c AS |
21 | /* BayTrail */ |
22 | static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = { | |
23 | .clk_rate = 25000000, | |
24 | .npwm = 1, | |
25 | .base_unit_bits = 16, | |
26 | }; | |
27 | ||
28 | /* Braswell */ | |
29 | static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = { | |
30 | .clk_rate = 19200000, | |
31 | .npwm = 1, | |
32 | .base_unit_bits = 16, | |
33 | }; | |
34 | ||
35 | /* Broxton */ | |
36 | static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = { | |
37 | .clk_rate = 19200000, | |
38 | .npwm = 4, | |
39 | .base_unit_bits = 22, | |
b997e3ed | 40 | .bypass = true, |
9900073c AS |
41 | }; |
42 | ||
c558e39e AS |
43 | static int pwm_lpss_probe_platform(struct platform_device *pdev) |
44 | { | |
45 | const struct pwm_lpss_boardinfo *info; | |
46 | const struct acpi_device_id *id; | |
47 | struct pwm_lpss_chip *lpwm; | |
48 | struct resource *r; | |
49 | ||
50 | id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); | |
51 | if (!id) | |
52 | return -ENODEV; | |
53 | ||
54 | info = (const struct pwm_lpss_boardinfo *)id->driver_data; | |
55 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
56 | ||
57 | lpwm = pwm_lpss_probe(&pdev->dev, r, info); | |
58 | if (IS_ERR(lpwm)) | |
59 | return PTR_ERR(lpwm); | |
60 | ||
61 | platform_set_drvdata(pdev, lpwm); | |
f080be27 QZ |
62 | |
63 | pm_runtime_set_active(&pdev->dev); | |
64 | pm_runtime_enable(&pdev->dev); | |
65 | ||
c558e39e AS |
66 | return 0; |
67 | } | |
68 | ||
69 | static int pwm_lpss_remove_platform(struct platform_device *pdev) | |
70 | { | |
71 | struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev); | |
72 | ||
f080be27 | 73 | pm_runtime_disable(&pdev->dev); |
c558e39e AS |
74 | return pwm_lpss_remove(lpwm); |
75 | } | |
76 | ||
77 | static const struct acpi_device_id pwm_lpss_acpi_match[] = { | |
78 | { "80860F09", (unsigned long)&pwm_lpss_byt_info }, | |
79 | { "80862288", (unsigned long)&pwm_lpss_bsw_info }, | |
03f00e53 | 80 | { "80865AC8", (unsigned long)&pwm_lpss_bxt_info }, |
c558e39e AS |
81 | { }, |
82 | }; | |
83 | MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match); | |
84 | ||
85 | static struct platform_driver pwm_lpss_driver_platform = { | |
86 | .driver = { | |
87 | .name = "pwm-lpss", | |
88 | .acpi_match_table = pwm_lpss_acpi_match, | |
89 | }, | |
90 | .probe = pwm_lpss_probe_platform, | |
91 | .remove = pwm_lpss_remove_platform, | |
92 | }; | |
93 | module_platform_driver(pwm_lpss_driver_platform); | |
94 | ||
95 | MODULE_DESCRIPTION("PWM platform driver for Intel LPSS"); | |
96 | MODULE_LICENSE("GPL v2"); | |
97 | MODULE_ALIAS("platform:pwm-lpss"); |