tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <linux/init.h>
2#include <linux/device.h>
3#include <linux/kernel.h>
4#include <linux/of.h>
5#include <linux/of_address.h>
6#include "board.h"
7
8static bool find_by_address(u64 base_address)
9{
10 struct device_node *dn = of_find_all_nodes(NULL);
11 struct resource res;
12
13 while (dn) {
14 if (!of_address_to_resource(dn, 0, &res)) {
15 if (res.start == base_address) {
16 of_node_put(dn);
17 return true;
18 }
19 }
20 dn = of_find_all_nodes(dn);
21 }
22
23 return false;
24}
25
26bool __init board_staging_dt_node_available(const struct resource *resource,
27 unsigned int num_resources)
28{
29 unsigned int i;
30
31 for (i = 0; i < num_resources; i++) {
32 const struct resource *r = resource + i;
33
34 if (resource_type(r) == IORESOURCE_MEM)
35 if (find_by_address(r->start))
36 return true; /* DT node available */
37 }
38
39 return false; /* Nothing found */
40}