common/deep-probe.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

// SPDX-License-Identifier: GPL-2.0-only

#define pr_fmt(fmt) "deep-probe: " fmt

#include <common.h>
#include <deep-probe.h>
#include <of.h>

enum deep_probe_state {
	DEEP_PROBE_UNKONWN = -1,
	DEEP_PROBE_NOT_SUPPORTED,
	DEEP_PROBE_SUPPORTED
};

static enum deep_probe_state boardstate = DEEP_PROBE_UNKONWN;

bool deep_probe_is_supported(void)
{
	struct deep_probe_entry *board;

	if (boardstate > DEEP_PROBE_UNKONWN)
		return boardstate;

	/* determine boardstate */
	for (board = &__barebox_deep_probe_start;
	     board != &__barebox_deep_probe_end; board++) {
		const struct of_device_id *matches = board->device_id;

		for (; matches->compatible; matches++) {
			if (of_machine_is_compatible(matches->compatible)) {
				boardstate = DEEP_PROBE_SUPPORTED;
				pr_info("supported due to %s\n", matches->compatible);
				return true;
			}
		}
	}

	boardstate = DEEP_PROBE_NOT_SUPPORTED;
	return false;
}
EXPORT_SYMBOL_GPL(deep_probe_is_supported);