2019-06-20 23:19:41 +02:00
|
|
|
// SPDX-License-Identifier: LGPL-2.1-or-later
|
Support ePAPR compliant phandle properties
Currently, the Linux kernel, libfdt and dtc, when using flattened
device trees encode a node's phandle into a property named
"linux,phandle". The ePAPR specification, however - aiming as it is
to not be a Linux specific spec - requires that phandles be encoded in
a property named simply "phandle".
This patch adds support for this newer approach to dtc and libfdt.
Specifically:
- fdt_get_phandle() will now return the correct phandle if it
is supplied in either of these properties
- fdt_node_offset_by_phandle() will correctly find a node with
the given phandle encoded in either property.
- By default, when auto-generating phandles, dtc will encode
it into both properties for maximum compatibility. A new -H
option allows either only old-style or only new-style
properties to be generated.
- If phandle properties are explicitly supplied in the dts
file, dtc will not auto-generate ones in the alternate format.
- If both properties are supplied, dtc will check that they
have the same value.
- Some existing testcases are updated to use a mix of old and
new-style phandles, partially testing the changes.
- A new phandle_format test further tests the libfdt support,
and the -H option.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2009-11-26 05:37:13 +01:00
|
|
|
/*
|
|
|
|
|
* libfdt - Flat Device Tree manipulation
|
|
|
|
|
* Testcase for phandle format options
|
|
|
|
|
* Copyright (C) 2009 David Gibson, IBM Corporation.
|
|
|
|
|
*/
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
#include <stdio.h>
|
|
|
|
|
#include <string.h>
|
|
|
|
|
#include <stdint.h>
|
|
|
|
|
|
|
|
|
|
#include <libfdt.h>
|
|
|
|
|
|
|
|
|
|
#include "tests.h"
|
|
|
|
|
#include "testdata.h"
|
|
|
|
|
|
|
|
|
|
#define PHANDLE_LEGACY 0x1
|
|
|
|
|
#define PHANDLE_EPAPR 0x2
|
|
|
|
|
#define PHANDLE_BOTH 0x3
|
|
|
|
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
|
|
|
{
|
|
|
|
|
void *fdt;
|
|
|
|
|
int phandle_format;
|
|
|
|
|
int n4;
|
|
|
|
|
uint32_t h4;
|
|
|
|
|
|
|
|
|
|
if (argc != 3)
|
|
|
|
|
CONFIG("Usage: %s <dtb file> <legacy|epapr|both>\n", argv[0]);
|
|
|
|
|
|
|
|
|
|
test_init(argc, argv);
|
|
|
|
|
fdt = load_blob(argv[1]);
|
|
|
|
|
|
|
|
|
|
if (streq(argv[2], "legacy"))
|
|
|
|
|
phandle_format = PHANDLE_LEGACY;
|
|
|
|
|
else if (streq(argv[2], "epapr"))
|
|
|
|
|
phandle_format = PHANDLE_EPAPR;
|
|
|
|
|
else if (streq(argv[2], "both"))
|
|
|
|
|
phandle_format = PHANDLE_BOTH;
|
|
|
|
|
else
|
|
|
|
|
CONFIG("Usage: %s <dtb file> <legacy|epapr|both>\n", argv[0]);
|
|
|
|
|
|
|
|
|
|
n4 = fdt_path_offset(fdt, "/node4");
|
|
|
|
|
if (n4 < 0)
|
|
|
|
|
FAIL("fdt_path_offset(/node4): %s", fdt_strerror(n4));
|
|
|
|
|
|
|
|
|
|
h4 = fdt_get_phandle(fdt, n4);
|
|
|
|
|
if ((h4 == 0) || (h4 == -1))
|
|
|
|
|
FAIL("/node4 has bad phandle 0x%x\n", h4);
|
|
|
|
|
|
|
|
|
|
if (phandle_format & PHANDLE_LEGACY)
|
|
|
|
|
check_getprop_cell(fdt, n4, "linux,phandle", h4);
|
|
|
|
|
else
|
|
|
|
|
if (fdt_getprop(fdt, n4, "linux,phandle", NULL))
|
|
|
|
|
FAIL("linux,phandle property present in non-legacy mode");
|
|
|
|
|
|
|
|
|
|
if (phandle_format & PHANDLE_EPAPR)
|
|
|
|
|
check_getprop_cell(fdt, n4, "phandle", h4);
|
|
|
|
|
else
|
|
|
|
|
if (fdt_getprop(fdt, n4, "phandle", NULL))
|
|
|
|
|
FAIL("phandle property present in legacy-only mode");
|
|
|
|
|
|
|
|
|
|
PASS();
|
|
|
|
|
}
|
