drivers/pwm/pwm-tipwmss.c

   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");