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
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
pwmss_probe(struct platform_device * pdev)31 static int pwmss_probe(struct platform_device *pdev)
32 {
33 int ret;
34 struct device_node *node = pdev->dev.of_node;
35
36 pm_runtime_enable(&pdev->dev);
37
38 /* Populate all the child nodes here... */
39 ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
40 if (ret)
41 dev_err(&pdev->dev, "no child node found\n");
42
43 return ret;
44 }
45
pwmss_remove(struct platform_device * pdev)46 static int pwmss_remove(struct platform_device *pdev)
47 {
48 pm_runtime_disable(&pdev->dev);
49 return 0;
50 }
51
52 static struct platform_driver pwmss_driver = {
53 .driver = {
54 .name = "pwmss",
55 .of_match_table = pwmss_of_match,
56 },
57 .probe = pwmss_probe,
58 .remove = pwmss_remove,
59 };
60
61 module_platform_driver(pwmss_driver);
62
63 MODULE_DESCRIPTION("PWM Subsystem driver");
64 MODULE_AUTHOR("Texas Instruments");
65 MODULE_LICENSE("GPL");
66