linux/drivers/bus/omap-ocp2scp.c
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   1/*
   2 * omap-ocp2scp.c - transform ocp interface protocol to scp protocol
   3 *
   4 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 *
  10 * Author: Kishon Vijay Abraham I <kishon@ti.com>
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 */
  18
  19#include <linux/module.h>
  20#include <linux/platform_device.h>
  21#include <linux/err.h>
  22#include <linux/pm_runtime.h>
  23#include <linux/of.h>
  24#include <linux/of_platform.h>
  25
  26static int ocp2scp_remove_devices(struct device *dev, void *c)
  27{
  28        struct platform_device *pdev = to_platform_device(dev);
  29
  30        platform_device_unregister(pdev);
  31
  32        return 0;
  33}
  34
  35static int omap_ocp2scp_probe(struct platform_device *pdev)
  36{
  37        int ret;
  38        struct device_node *np = pdev->dev.of_node;
  39
  40        if (np) {
  41                ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
  42                if (ret) {
  43                        dev_err(&pdev->dev,
  44                            "failed to add resources for ocp2scp child\n");
  45                        goto err0;
  46                }
  47        }
  48
  49        pm_runtime_enable(&pdev->dev);
  50
  51        return 0;
  52
  53err0:
  54        device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
  55
  56        return ret;
  57}
  58
  59static int omap_ocp2scp_remove(struct platform_device *pdev)
  60{
  61        pm_runtime_disable(&pdev->dev);
  62        device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
  63
  64        return 0;
  65}
  66
  67#ifdef CONFIG_OF
  68static const struct of_device_id omap_ocp2scp_id_table[] = {
  69        { .compatible = "ti,omap-ocp2scp" },
  70        {}
  71};
  72MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
  73#endif
  74
  75static struct platform_driver omap_ocp2scp_driver = {
  76        .probe          = omap_ocp2scp_probe,
  77        .remove         = omap_ocp2scp_remove,
  78        .driver         = {
  79                .name   = "omap-ocp2scp",
  80                .owner  = THIS_MODULE,
  81                .of_match_table = of_match_ptr(omap_ocp2scp_id_table),
  82        },
  83};
  84
  85module_platform_driver(omap_ocp2scp_driver);
  86
  87MODULE_ALIAS("platform: omap-ocp2scp");
  88MODULE_AUTHOR("Texas Instruments Inc.");
  89MODULE_DESCRIPTION("OMAP OCP2SCP driver");
  90MODULE_LICENSE("GPL v2");
  91
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