diff options
Diffstat (limited to 'drivers/of/property.c')
| -rw-r--r-- | drivers/of/property.c | 83 |
1 files changed, 65 insertions, 18 deletions
diff --git a/drivers/of/property.c b/drivers/of/property.c index 9eb45f69db2f..fbb72116e9d4 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -707,6 +707,15 @@ struct device_node *of_graph_get_port_parent(struct device_node *node) { unsigned int depth; + if (!node) + return NULL; + + /* + * Preserve usecount for passed in node as of_get_next_parent() + * will do of_node_put() on it. + */ + of_node_get(node); + /* Walk 3 levels up only if there is 'ports' node. */ for (depth = 3; depth && node; depth--) { node = of_get_next_parent(node); @@ -727,12 +736,16 @@ EXPORT_SYMBOL(of_graph_get_port_parent); struct device_node *of_graph_get_remote_port_parent( const struct device_node *node) { - struct device_node *np; + struct device_node *np, *pp; /* Get remote endpoint node. */ np = of_graph_get_remote_endpoint(node); - return of_graph_get_port_parent(np); + pp = of_graph_get_port_parent(np); + + of_node_put(np); + + return pp; } EXPORT_SYMBOL(of_graph_get_remote_port_parent); @@ -814,23 +827,23 @@ static void of_fwnode_put(struct fwnode_handle *fwnode) of_node_put(to_of_node(fwnode)); } -static bool of_fwnode_device_is_available(struct fwnode_handle *fwnode) +static bool of_fwnode_device_is_available(const struct fwnode_handle *fwnode) { return of_device_is_available(to_of_node(fwnode)); } -static bool of_fwnode_property_present(struct fwnode_handle *fwnode, +static bool of_fwnode_property_present(const struct fwnode_handle *fwnode, const char *propname) { return of_property_read_bool(to_of_node(fwnode), propname); } -static int of_fwnode_property_read_int_array(struct fwnode_handle *fwnode, +static int of_fwnode_property_read_int_array(const struct fwnode_handle *fwnode, const char *propname, unsigned int elem_size, void *val, size_t nval) { - struct device_node *node = to_of_node(fwnode); + const struct device_node *node = to_of_node(fwnode); if (!val) return of_property_count_elems_of_size(node, propname, @@ -850,24 +863,26 @@ static int of_fwnode_property_read_int_array(struct fwnode_handle *fwnode, return -ENXIO; } -static int of_fwnode_property_read_string_array(struct fwnode_handle *fwnode, - const char *propname, - const char **val, size_t nval) +static int +of_fwnode_property_read_string_array(const struct fwnode_handle *fwnode, + const char *propname, const char **val, + size_t nval) { - struct device_node *node = to_of_node(fwnode); + const struct device_node *node = to_of_node(fwnode); return val ? of_property_read_string_array(node, propname, val, nval) : of_property_count_strings(node, propname); } -static struct fwnode_handle *of_fwnode_get_parent(struct fwnode_handle *fwnode) +static struct fwnode_handle * +of_fwnode_get_parent(const struct fwnode_handle *fwnode) { return of_fwnode_handle(of_get_parent(to_of_node(fwnode))); } static struct fwnode_handle * -of_fwnode_get_next_child_node(struct fwnode_handle *fwnode, +of_fwnode_get_next_child_node(const struct fwnode_handle *fwnode, struct fwnode_handle *child) { return of_fwnode_handle(of_get_next_available_child(to_of_node(fwnode), @@ -875,10 +890,10 @@ of_fwnode_get_next_child_node(struct fwnode_handle *fwnode, } static struct fwnode_handle * -of_fwnode_get_named_child_node(struct fwnode_handle *fwnode, +of_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, const char *childname) { - struct device_node *node = to_of_node(fwnode); + const struct device_node *node = to_of_node(fwnode); struct device_node *child; for_each_available_child_of_node(node, child) @@ -888,8 +903,38 @@ of_fwnode_get_named_child_node(struct fwnode_handle *fwnode, return NULL; } +static int +of_fwnode_get_reference_args(const struct fwnode_handle *fwnode, + const char *prop, const char *nargs_prop, + unsigned int nargs, unsigned int index, + struct fwnode_reference_args *args) +{ + struct of_phandle_args of_args; + unsigned int i; + int ret; + + if (nargs_prop) + ret = of_parse_phandle_with_args(to_of_node(fwnode), prop, + nargs_prop, index, &of_args); + else + ret = of_parse_phandle_with_fixed_args(to_of_node(fwnode), prop, + nargs, index, &of_args); + if (ret < 0) + return ret; + if (!args) + return 0; + + args->nargs = of_args.args_count; + args->fwnode = of_fwnode_handle(of_args.np); + + for (i = 0; i < NR_FWNODE_REFERENCE_ARGS; i++) + args->args[i] = i < of_args.args_count ? of_args.args[i] : 0; + + return 0; +} + static struct fwnode_handle * -of_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode, +of_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle *prev) { return of_fwnode_handle(of_graph_get_next_endpoint(to_of_node(fwnode), @@ -897,7 +942,7 @@ of_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode, } static struct fwnode_handle * -of_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) +of_fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode) { return of_fwnode_handle( of_graph_get_remote_endpoint(to_of_node(fwnode))); @@ -920,10 +965,10 @@ of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode) return of_fwnode_handle(of_get_next_parent(np)); } -static int of_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, +static int of_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, struct fwnode_endpoint *endpoint) { - struct device_node *node = to_of_node(fwnode); + const struct device_node *node = to_of_node(fwnode); struct device_node *port_node = of_get_parent(node); endpoint->local_fwnode = fwnode; @@ -946,8 +991,10 @@ const struct fwnode_operations of_fwnode_ops = { .get_parent = of_fwnode_get_parent, .get_next_child_node = of_fwnode_get_next_child_node, .get_named_child_node = of_fwnode_get_named_child_node, + .get_reference_args = of_fwnode_get_reference_args, .graph_get_next_endpoint = of_fwnode_graph_get_next_endpoint, .graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint, .graph_get_port_parent = of_fwnode_graph_get_port_parent, .graph_parse_endpoint = of_fwnode_graph_parse_endpoint, }; +EXPORT_SYMBOL_GPL(of_fwnode_ops); |