xref: /openbmc/linux/drivers/bus/ti-pwmss.c (revision 6c33a6f4)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * TI PWM Subsystem driver
4  *
5  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
6  */
7 
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/io.h>
11 #include <linux/err.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/of_device.h>
14 
15 static const struct of_device_id pwmss_of_match[] = {
16 	{ .compatible	= "ti,am33xx-pwmss" },
17 	{},
18 };
19 MODULE_DEVICE_TABLE(of, pwmss_of_match);
20 
21 static int pwmss_probe(struct platform_device *pdev)
22 {
23 	int ret;
24 	struct device_node *node = pdev->dev.of_node;
25 
26 	pm_runtime_enable(&pdev->dev);
27 
28 	/* Populate all the child nodes here... */
29 	ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
30 	if (ret)
31 		dev_err(&pdev->dev, "no child node found\n");
32 
33 	return ret;
34 }
35 
36 static int pwmss_remove(struct platform_device *pdev)
37 {
38 	pm_runtime_disable(&pdev->dev);
39 	return 0;
40 }
41 
42 static struct platform_driver pwmss_driver = {
43 	.driver	= {
44 		.name	= "pwmss",
45 		.of_match_table	= pwmss_of_match,
46 	},
47 	.probe	= pwmss_probe,
48 	.remove	= pwmss_remove,
49 };
50 
51 module_platform_driver(pwmss_driver);
52 
53 MODULE_DESCRIPTION("PWM Subsystem driver");
54 MODULE_AUTHOR("Texas Instruments");
55 MODULE_LICENSE("GPL");
56