mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
a44810123f
Add a function which reads resources from a device, such as the device hardware address. This uses the "reg" property in the device. Unlike other functions there is little sense in inlining this when livetree is not being used because it has some logic in it and this would just bloat the code size. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Tested-on: Beaver, Jetson-TK1
38 lines
753 B
C
38 lines
753 B
C
/*
|
|
* Copyright (c) 2017 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <dm/of_addr.h>
|
|
#include <dm/read.h>
|
|
#include <linux/ioport.h>
|
|
|
|
int dev_read_resource(struct udevice *dev, uint index, struct resource *res)
|
|
{
|
|
ofnode node = dev_ofnode(dev);
|
|
|
|
#ifdef CONFIG_OF_LIVE
|
|
if (ofnode_is_np(node)) {
|
|
return of_address_to_resource(ofnode_to_np(node), index, res);
|
|
} else
|
|
#endif
|
|
{
|
|
struct fdt_resource fres;
|
|
int ret;
|
|
|
|
ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
|
|
"reg", index, &fres);
|
|
if (ret < 0)
|
|
return -EINVAL;
|
|
memset(res, '\0', sizeof(*res));
|
|
res->start = fres.start;
|
|
res->end = fres.end;
|
|
|
|
return 0;
|
|
}
|
|
}
|