umc-dev.c

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/*
 * UWB Multi-interface Controller device management.
 *
 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
 *
 * This file is released under the GNU GPL v2.
 */
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/uwb/umc.h>

static void umc_device_release(struct device *dev)
{
    struct umc_dev *umc = to_umc_dev(dev);

    kfree(umc);
}

struct umc_dev *umc_device_create(struct device *parent, int n)
{
    struct umc_dev *umc;

    umc = kzalloc(sizeof(struct umc_dev), GFP_KERNEL);
    if (umc) {
        dev_set_name(&umc->dev, "%s-%d", dev_name(parent), n);
        umc->dev.parent  = parent;
        umc->dev.bus     = &umc_bus_type;
        umc->dev.release = umc_device_release;

        umc->dev.dma_mask = parent->dma_mask;
    }
    return umc;
}
EXPORT_SYMBOL_GPL(umc_device_create);

int umc_device_register(struct umc_dev *umc)
{
    int err;

    err = request_resource(umc->resource.parent, &umc->resource);
    if (err < 0) {
        dev_err(&umc->dev, "can't allocate resource range %pR: %d\n",
            &umc->resource, err);
        goto error_request_resource;
    }

    err = device_register(&umc->dev);
    if (err < 0)
        goto error_device_register;
    return 0;

error_device_register:
    release_resource(&umc->resource);
error_request_resource:
    return err;
}
EXPORT_SYMBOL_GPL(umc_device_register);

void umc_device_unregister(struct umc_dev *umc)
{
    struct device *dev;
    if (!umc)
        return;
    dev = get_device(&umc->dev);
    device_unregister(&umc->dev);
    release_resource(&umc->resource);
    put_device(dev);
}
EXPORT_SYMBOL_GPL(umc_device_unregister);