arch/arm/mach-integrator/lm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/arch/arm/mach-integrator/lm.c
   4  *
   5  *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
   6  */
   7 #include <linux/module.h>
   8 #include <linux/init.h>
   9 #include <linux/device.h>
  10 #include <linux/slab.h>
  11
  12 #include "lm.h"
  13
  14 #define to_lm_device(d) container_of(d, struct lm_device, dev)
  15 #define to_lm_driver(d) container_of(d, struct lm_driver, drv)
  16
  17 static int lm_match(struct device *dev, struct device_driver *drv)
  18 {
  19         return 1;
  20 }
  21
  22 static int lm_bus_probe(struct device *dev)
  23 {
  24         struct lm_device *lmdev = to_lm_device(dev);
  25         struct lm_driver *lmdrv = to_lm_driver(dev->driver);
  26
  27         return lmdrv->probe(lmdev);
  28 }
  29
  30 static int lm_bus_remove(struct device *dev)
  31 {
  32         struct lm_device *lmdev = to_lm_device(dev);
  33         struct lm_driver *lmdrv = to_lm_driver(dev->driver);
  34
  35         if (lmdrv->remove)
  36                 lmdrv->remove(lmdev);
  37         return 0;
  38 }
  39
  40 static struct bus_type lm_bustype = {
  41         .name           = "logicmodule",
  42         .match          = lm_match,
  43         .probe          = lm_bus_probe,
  44         .remove         = lm_bus_remove,
  45 //      .suspend        = lm_bus_suspend,
  46 //      .resume         = lm_bus_resume,
  47 };
  48
  49 static int __init lm_init(void)
  50 {
  51         return bus_register(&lm_bustype);
  52 }
  53
  54 postcore_initcall(lm_init);
  55
  56 int lm_driver_register(struct lm_driver *drv)
  57 {
  58         drv->drv.bus = &lm_bustype;
  59         return driver_register(&drv->drv);
  60 }
  61
  62 void lm_driver_unregister(struct lm_driver *drv)
  63 {
  64         driver_unregister(&drv->drv);
  65 }
  66
  67 static void lm_device_release(struct device *dev)
  68 {
  69         struct lm_device *d = to_lm_device(dev);
  70
  71         kfree(d);
  72 }
  73
  74 int lm_device_register(struct lm_device *dev)
  75 {
  76         int ret;
  77
  78         dev->dev.release = lm_device_release;
  79         dev->dev.bus = &lm_bustype;
  80
  81         ret = dev_set_name(&dev->dev, "lm%d", dev->id);
  82         if (ret)
  83                 return ret;
  84         dev->resource.name = dev_name(&dev->dev);
  85
  86         ret = request_resource(&iomem_resource, &dev->resource);
  87         if (ret == 0) {
  88                 ret = device_register(&dev->dev);
  89                 if (ret)
  90                         release_resource(&dev->resource);
  91         }
  92         return ret;
  93 }
  94
  95 EXPORT_SYMBOL(lm_driver_register);
  96 EXPORT_SYMBOL(lm_driver_unregister);