phandle_t
fdt_depth_search_compatible(phandle_t start, const char *compat, int strict)
{
phandle_t child, node;
/*
* Depth-search all descendants of 'start' node, and find first with
* matching 'compatible' property.
*/
for (node = OF_child(start); node != 0; node = OF_peer(node)) {
if (fdt_is_compatible(node, compat) &&
(strict == 0 || fdt_is_compatible_strict(node, compat))) {
return (node);
}
child = fdt_depth_search_compatible(node, compat, strict);
if (child != 0)
return (child);
}
return (0);
}
static void
fsl_ocotp_devmap(void)
{
phandle_t child, root;
u_long base, size;
if ((root = OF_finddevice("/")) == 0)
goto fatal;
if ((child = fdt_depth_search_compatible(root, "fsl,imx6q-ocotp", 0)) == 0)
goto fatal;
if (fdt_regsize(child, &base, &size) != 0)
goto fatal;
ocotp_size = (vm_size_t)size;
if ((ocotp_regs = pmap_mapdev((vm_offset_t)base, ocotp_size)) == NULL)
goto fatal;
return;
fatal:
panic("cannot find/map the ocotp registers");
}
