dm: core: Add ofnode function to read a 64-bit int
We have a 32-bit version of this function. Add a 64-bit version as well so
we can easily read 64-bit ints from the device tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/of_access.c b/drivers/core/of_access.c
index 9a50f55..0729dfc 100644
--- a/drivers/core/of_access.c
+++ b/drivers/core/of_access.c
@@ -457,6 +457,26 @@
return 0;
}
+int of_read_u64(const struct device_node *np, const char *propname, u64 *outp)
+{
+ const __be64 *val;
+
+ debug("%s: %s: ", __func__, propname);
+ if (!np)
+ return -EINVAL;
+ val = of_find_property_value_of_size(np, propname, sizeof(*outp));
+ if (IS_ERR(val)) {
+ debug("(not found)\n");
+ return PTR_ERR(val);
+ }
+
+ *outp = be64_to_cpup(val);
+ debug("%#llx (%lld)\n", (unsigned long long)*outp,
+ (unsigned long long)*outp);
+
+ return 0;
+}
+
int of_property_match_string(const struct device_node *np, const char *propname,
const char *string)
{
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index 3cf3205..b2b02e4 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -55,6 +55,38 @@
return def;
}
+int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
+{
+ const fdt64_t *cell;
+ int len;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node))
+ return of_read_u64(ofnode_to_np(node), propname, outp);
+
+ cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
+ &len);
+ if (!cell || len < sizeof(*cell)) {
+ debug("(not found)\n");
+ return -EINVAL;
+ }
+ *outp = fdt64_to_cpu(cell[0]);
+ debug("%#llx (%lld)\n", (unsigned long long)*outp,
+ (unsigned long long)*outp);
+
+ return 0;
+}
+
+int ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u64(node, propname, &def);
+
+ return def;
+}
+
bool ofnode_read_bool(ofnode node, const char *propname)
{
const void *prop;