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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - drivers/uwb/umc-dev.c
2 * UWB Multi-interface Controller device management.
4 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
6 * This file is released under the GNU GPL v2.
8 #include <linux/kernel.h>
9 #include <linux/slab.h>
10 #include <linux/uwb/umc.h>
12 static void umc_device_release(struct device
*dev
)
14 struct umc_dev
*umc
= to_umc_dev(dev
);
20 * umc_device_create - allocate a child UMC device
21 * @parent: parent of the new UMC device.
22 * @n: index of the new device.
24 * The new UMC device will have a bus ID of the parent with '-n'
27 struct umc_dev
*umc_device_create(struct device
*parent
, int n
)
31 umc
= kzalloc(sizeof(struct umc_dev
), GFP_KERNEL
);
33 dev_set_name(&umc
->dev
, "%s-%d", dev_name(parent
), n
);
34 umc
->dev
.parent
= parent
;
35 umc
->dev
.bus
= &umc_bus_type
;
36 umc
->dev
.release
= umc_device_release
;
38 umc
->dev
.dma_mask
= parent
->dma_mask
;
42 EXPORT_SYMBOL_GPL(umc_device_create
);
45 * umc_device_register - register a UMC device
46 * @umc: pointer to the UMC device
48 * The memory resource for the UMC device is acquired and the device
49 * registered with the system.
51 int umc_device_register(struct umc_dev
*umc
)
55 err
= request_resource(umc
->resource
.parent
, &umc
->resource
);
57 dev_err(&umc
->dev
, "can't allocate resource range %pR: %d\n",
59 goto error_request_resource
;
62 err
= device_register(&umc
->dev
);
64 goto error_device_register
;
67 error_device_register
:
68 release_resource(&umc
->resource
);
69 error_request_resource
:
72 EXPORT_SYMBOL_GPL(umc_device_register
);
75 * umc_device_unregister - unregister a UMC device
76 * @umc: pointer to the UMC device
78 * First we unregister the device, make sure the driver can do it's
79 * resource release thing and then we try to release any left over
80 * resources. We take a ref to the device, to make sure it doesn't
81 * disappear under our feet.
83 void umc_device_unregister(struct umc_dev
*umc
)
88 dev
= get_device(&umc
->dev
);
89 device_unregister(&umc
->dev
);
90 release_resource(&umc
->resource
);
93 EXPORT_SYMBOL_GPL(umc_device_unregister
);