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1 | /* |
2 | * TI PWM Subsystem driver | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/io.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/pm_runtime.h> | |
23 | #include <linux/of_device.h> | |
24 | ||
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25 | static const struct of_device_id pwmss_of_match[] = { |
26 | { .compatible = "ti,am33xx-pwmss" }, | |
27 | {}, | |
28 | }; | |
29 | MODULE_DEVICE_TABLE(of, pwmss_of_match); | |
30 | ||
31 | static int pwmss_probe(struct platform_device *pdev) | |
32 | { | |
33 | int ret; | |
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34 | struct device_node *node = pdev->dev.of_node; |
35 | ||
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36 | pm_runtime_enable(&pdev->dev); |
37 | pm_runtime_get_sync(&pdev->dev); | |
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38 | |
39 | /* Populate all the child nodes here... */ | |
40 | ret = of_platform_populate(node, NULL, NULL, &pdev->dev); | |
41 | if (ret) | |
42 | dev_err(&pdev->dev, "no child node found\n"); | |
43 | ||
44 | return ret; | |
45 | } | |
46 | ||
47 | static int pwmss_remove(struct platform_device *pdev) | |
48 | { | |
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49 | pm_runtime_put_sync(&pdev->dev); |
50 | pm_runtime_disable(&pdev->dev); | |
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51 | return 0; |
52 | } | |
53 | ||
c26e9bb4 | 54 | #ifdef CONFIG_PM_SLEEP |
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55 | static int pwmss_suspend(struct device *dev) |
56 | { | |
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57 | pm_runtime_put_sync(dev); |
58 | return 0; | |
59 | } | |
60 | ||
61 | static int pwmss_resume(struct device *dev) | |
62 | { | |
af0ba001 | 63 | pm_runtime_get_sync(dev); |
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64 | return 0; |
65 | } | |
c26e9bb4 | 66 | #endif |
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67 | |
68 | static SIMPLE_DEV_PM_OPS(pwmss_pm_ops, pwmss_suspend, pwmss_resume); | |
69 | ||
70 | static struct platform_driver pwmss_driver = { | |
71 | .driver = { | |
72 | .name = "pwmss", | |
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73 | .pm = &pwmss_pm_ops, |
74 | .of_match_table = pwmss_of_match, | |
75 | }, | |
76 | .probe = pwmss_probe, | |
77 | .remove = pwmss_remove, | |
78 | }; | |
79 | ||
80 | module_platform_driver(pwmss_driver); | |
81 | ||
82 | MODULE_DESCRIPTION("PWM Subsystem driver"); | |
83 | MODULE_AUTHOR("Texas Instruments"); | |
84 | MODULE_LICENSE("GPL"); |