diff options
Diffstat (limited to 'drivers/acpi/property.c')
-rw-r--r-- | drivers/acpi/property.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 9364398204e91..14013f635db61 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -57,6 +57,7 @@ static bool acpi_nondev_subnode_extract(const union acpi_object *desc, dn->name = link->package.elements[0].string.pointer; dn->fwnode.type = FWNODE_ACPI_DATA; + dn->fwnode.ops = &acpi_fwnode_ops; dn->parent = parent; INIT_LIST_HEAD(&dn->data.subnodes); @@ -1119,3 +1120,70 @@ int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode, return 0; } + +static bool acpi_fwnode_property_present(struct fwnode_handle *fwnode, + const char *propname) +{ + return !acpi_node_prop_get(fwnode, propname, NULL); +} + +static int acpi_fwnode_property_read_int_array(struct fwnode_handle *fwnode, + const char *propname, + unsigned int elem_size, + void *val, size_t nval) +{ + enum dev_prop_type type; + + switch (elem_size) { + case sizeof(u8): + type = DEV_PROP_U8; + break; + case sizeof(u16): + type = DEV_PROP_U16; + break; + case sizeof(u32): + type = DEV_PROP_U32; + break; + case sizeof(u64): + type = DEV_PROP_U64; + break; + default: + return -ENXIO; + } + + return acpi_node_prop_read(fwnode, propname, type, val, nval); +} + +static int acpi_fwnode_property_read_string_array(struct fwnode_handle *fwnode, + const char *propname, + const char **val, size_t nval) +{ + return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, + val, nval); +} + +static struct fwnode_handle * +acpi_fwnode_get_named_child_node(struct fwnode_handle *fwnode, + const char *childname) +{ + struct fwnode_handle *child; + + /* + * Find first matching named child node of this fwnode. + * For ACPI this will be a data only sub-node. + */ + fwnode_for_each_child_node(fwnode, child) + if (acpi_data_node_match(child, childname)) + return child; + + return NULL; +} + +const struct fwnode_operations acpi_fwnode_ops = { + .property_present = acpi_fwnode_property_present, + .property_read_int_array = acpi_fwnode_property_read_int_array, + .property_read_string_array = acpi_fwnode_property_read_string_array, + .get_parent = acpi_node_get_parent, + .get_next_child_node = acpi_get_next_subnode, + .get_named_child_node = acpi_fwnode_get_named_child_node, +}; |