@@ -262,6 +262,12 @@ static int property_entry_copy_data(struct property_entry *dst,
}
dst->pointer.raw = new;
+ } else if (src->type == DEV_PROP_REF) {
+ /*
+ * Reference properties are never stored inline as
+ * they are too big.
+ */
+ return -EINVAL;
} else if (src->type == DEV_PROP_STRING) {
new = kstrdup(src->value.str, GFP_KERNEL);
if (!new && src->value.str)
@@ -447,21 +453,45 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode,
{
struct swnode *swnode = to_swnode(fwnode);
const struct software_node_reference *ref;
+ const struct software_node_ref_args *ref_args;
const struct property_entry *prop;
struct fwnode_handle *refnode;
int i;
- if (!swnode || !swnode->node->references)
+ if (!swnode)
return -ENOENT;
- for (ref = swnode->node->references; ref->name; ref++)
- if (!strcmp(ref->name, propname))
- break;
+ prop = property_entry_get(swnode->node->properties, propname);
+ if (prop) {
+ if (prop->type != DEV_PROP_REF)
+ return -EINVAL;
- if (!ref->name || index > (ref->nrefs - 1))
- return -ENOENT;
+ /*
+ * We expect that references are never stored inline, even
+ * single ones, as they are too big.
+ */
+ if (prop->is_inline)
+ return -EINVAL;
+
+ if (index * sizeof(*ref_args) >= prop->length)
+ return -ENOENT;
+
+ ref_args = &prop->pointer.ref[index];
+ } else {
+ if (!swnode->node->references)
+ return -ENOENT;
+
+ for (ref = swnode->node->references; ref->name; ref++)
+ if (!strcmp(ref->name, propname))
+ break;
+
+ if (!ref->name || index > (ref->nrefs - 1))
+ return -ENOENT;
+
+ ref_args = &ref->refs[index];
+ }
- refnode = software_node_fwnode(ref->refs[index].node);
+ refnode = software_node_fwnode(ref_args->node);
if (!refnode)
return -ENOENT;
@@ -480,7 +510,7 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode,
args->nargs = nargs;
for (i = 0; i < nargs; i++)
- args->args[i] = ref->refs[index].args[i];
+ args->args[i] = ref_args->args[i];
return 0;
}
@@ -22,6 +22,7 @@ enum dev_prop_type {
DEV_PROP_U32,
DEV_PROP_U64,
DEV_PROP_STRING,
+ DEV_PROP_REF,
};
enum dev_dma_attr {
@@ -218,6 +219,20 @@ static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
}
+struct software_node;
+
+/**
+ * struct software_node_ref_args - Reference property with additional arguments
+ * @node: Reference to a software node
+ * @nargs: Number of elements in @args array
+ * @args: Integer arguments
+ */
+struct software_node_ref_args {
+ const struct software_node *node;
+ unsigned int nargs;
+ u64 args[NR_FWNODE_REFERENCE_ARGS];
+};
+
/**
* struct property_entry - "Built-in" device property representation.
* @name: Name of the property.
@@ -240,6 +255,7 @@ struct property_entry {
const u32 *u32_data;
const u64 *u64_data;
const char * const *str;
+ const struct software_node_ref_args *ref;
const void *raw;
} pointer;
union {
@@ -279,6 +295,8 @@ struct property_entry {
PROPERTY_ENTRY_ARRAY(_name_, u64_data, U64, _val_)
#define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \
PROPERTY_ENTRY_ARRAY(_name_, str, STRING, _val_)
+#define PROPERTY_ENTRY_REF_ARRAY(_name_, _val_) \
+ PROPERTY_ENTRY_ARRAY(_name_, ref, REF, _val_)
#define PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_) \
(struct property_entry) { \
@@ -298,6 +316,8 @@ struct property_entry {
PROPERTY_ENTRY_ARRAY_LEN(_name_, u64_data, U64, _val_, _len_)
#define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_) \
PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_)
+#define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_) \
+ PROPERTY_ENTRY_ARRAY_LEN(_name_, ref, REF, _val_, _len)
#define PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_) \
(struct property_entry) { \
@@ -324,6 +344,18 @@ struct property_entry {
.name = _name_, \
}
+#define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \
+(struct property_entry) { \
+ .name = _name_, \
+ .length = sizeof(struct software_node_ref_args), \
+ .type = DEV_PROP_REF, \
+ .pointer.ref = &(const struct software_node_ref_args) { \
+ .node = _ref_, \
+ .nargs = ARRAY_SIZE(((u64[]){ 0, ##__VA_ARGS__ })) - 1, \
+ .args = { __VA_ARGS__ }, \
+ }, \
+}
+
struct property_entry *
property_entries_dup(const struct property_entry *properties);
@@ -387,20 +419,6 @@ int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
/* -------------------------------------------------------------------------- */
/* Software fwnode support - when HW description is incomplete or missing */
-struct software_node;
-
-/**
- * struct software_node_ref_args - Reference with additional arguments
- * @node: Reference to a software node
- * @nargs: Number of elements in @args array
- * @args: Integer arguments
- */
-struct software_node_ref_args {
- const struct software_node *node;
- unsigned int nargs;
- u64 args[NR_FWNODE_REFERENCE_ARGS];
-};
-
/**
* struct software_node_reference - Named software node reference property
* @name: Name of the property
It is possible to store references to software nodes in the same fashion as other static properties, so that users do not need to define separate structures: static const struct software_node gpio_bank_b_node = { .name = "B", }; static const struct property_entry simone_key_enter_props[] = { PROPERTY_ENTRY_U32("linux,code", KEY_ENTER), PROPERTY_ENTRY_STRING("label", "enter"), PROPERTY_ENTRY_REF("gpios", &gpio_bank_b_node, 123, GPIO_ACTIVE_LOW), { } }; Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> --- drivers/base/swnode.c | 46 +++++++++++++++++++++++++++++++++------- include/linux/property.h | 46 ++++++++++++++++++++++++++++------------ 2 files changed, 70 insertions(+), 22 deletions(-)