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dm: core: implement ofnode/tree_parse_phandle() helper

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Implement ofnode/tree_parse_phandle() helper as an equivalent of
of_parse_phandle to handle simple single value phandle.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Christian Marangi 2024-11-10 12:50:22 +01:00 • committed by Tom Rini
parent 8f9cc56a5b
commit 2d31a2797a
2 changed files with 84 additions and 0 deletions
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58
drivers/core/ofnode.c
View file

@ -879,6 +879,64 @@ int ofnode_read_string_list(ofnode node, const char *property,
return count; return count;
} }
ofnode ofnode_parse_phandle(ofnode node, const char *phandle_name,
int index)
{
ofnode phandle;
if (ofnode_is_np(node)) {
struct device_node *np;
np = of_parse_phandle(ofnode_to_np(node), phandle_name,
index);
if (!np)
return ofnode_null();
phandle = np_to_ofnode(np);
} else {
struct fdtdec_phandle_args args;
if (fdtdec_parse_phandle_with_args(ofnode_to_fdt(node),
ofnode_to_offset(node),
phandle_name, NULL,
0, index, &args))
return ofnode_null();
phandle = offset_to_ofnode(args.node);
}
return phandle;
}
ofnode oftree_parse_phandle(oftree tree, ofnode node, const char *phandle_name,
int index)
{
ofnode phandle;
if (ofnode_is_np(node)) {
struct device_node *np;
np = of_root_parse_phandle(tree.np, ofnode_to_np(node),
phandle_name, index);
if (!np)
return ofnode_null();
phandle = np_to_ofnode(np);
} else {
struct fdtdec_phandle_args args;
if (fdtdec_parse_phandle_with_args(tree.fdt,
ofnode_to_offset(node),
phandle_name, NULL,
0, index, &args))
return ofnode_null();
phandle = noffset_to_ofnode(node, args.node);
}
return phandle;
}
static void ofnode_from_fdtdec_phandle_args(ofnode node, struct fdtdec_phandle_args *in, static void ofnode_from_fdtdec_phandle_args(ofnode node, struct fdtdec_phandle_args *in,
struct ofnode_phandle_args *out) struct ofnode_phandle_args *out)
{ {

26
include/dm/ofnode.h
View file

@ -847,6 +847,18 @@ int ofnode_read_string_count(ofnode node, const char *property);
int ofnode_read_string_list(ofnode node, const char *property, int ofnode_read_string_list(ofnode node, const char *property,
const char ***listp); const char ***listp);
/**
* ofnode_parse_phandle() - Resolve a phandle property to an ofnode
*
* @node: node to check
* @phandle_name: Name of property holding a phandle value
* @index: For properties holding a table of phandles, this is the index into
* the table
* Return: ofnode that the phandle points to or ofnode_null() on error.
*/
ofnode ofnode_parse_phandle(ofnode node, const char *phandle_name,
int index);
/** /**
* ofnode_parse_phandle_with_args() - Find a node pointed by phandle in a list * ofnode_parse_phandle_with_args() - Find a node pointed by phandle in a list
* *
@ -909,6 +921,20 @@ int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
int ofnode_count_phandle_with_args(ofnode node, const char *list_name, int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
const char *cells_name, int cell_count); const char *cells_name, int cell_count);
/**
* oftree_parse_phandle() - Resolve a phandle property to an ofnode
* from a root node
*
* @tree: device tree to use
* @node: node to check
* @phandle_name: Name of property holding a phandle value
* @index: For properties holding a table of phandles, this is the index into
* the table
* Return: ofnode that the phandle points to or ofnode_null() on error.
*/
ofnode oftree_parse_phandle(oftree tree, ofnode node, const char *phandle_name,
int index);
/** /**
* oftree_parse_phandle_with_args() - Find a node pointed by phandle in a list * oftree_parse_phandle_with_args() - Find a node pointed by phandle in a list
* from a root node * from a root node