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/*
* xen/arch/arm/device.c
*
* Helpers to use a device retrieved via the device tree.
*
* Julien Grall <julien.grall@linaro.org>
* Copyright (C) 2013 Linaro Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <asm/device.h>
#include <xen/errno.h>
#include <xen/lib.h>
extern const struct device_desc _sdevice[], _edevice[];
static bool_t __init device_is_compatible(const struct device_desc *desc,
const struct dt_device_node *dev)
{
const char *const *compat;
if ( !desc->compatible )
return 0;
for ( compat = desc->compatible; *compat; compat++ )
{
if ( dt_device_is_compatible(dev, *compat) )
return 1;
}
return 0;
}
int __init device_init(struct dt_device_node *dev, enum device_type type,
const void *data)
{
const struct device_desc *desc;
ASSERT(dev != NULL);
if ( !dt_device_is_available(dev) )
return -ENODEV;
for ( desc = _sdevice; desc != _edevice; desc++ )
{
if ( desc->type != type )
continue;
if ( device_is_compatible(desc, dev) )
{
ASSERT(desc->init != NULL);
return desc->init(dev, data);
}
}
return -EBADF;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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