/** * fwnode_property_present - check if a property of a firmware node is present * @fwnode: Firmware node whose property to check * @propname: Name of the property */ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) { if (is_of_node(fwnode)) return of_property_read_bool(to_of_node(fwnode), propname); else if (is_acpi_node(fwnode)) return !acpi_dev_prop_get(to_acpi_node(fwnode), propname, NULL); return !!pset_prop_get(to_pset(fwnode), propname); }
/** * fwnode_property_read_string - return a string property of a firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property * @val: The value is stored here * * Read property @propname from the given firmware node and store the value into * @val if found. The value is checked to be a string. * * Return: %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property is not a string, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_string(struct fwnode_handle *fwnode, const char *propname, const char **val) { if (is_of_node(fwnode)) return of_property_read_string(to_of_node(fwnode), propname, val); else if (is_acpi_node(fwnode)) return acpi_dev_prop_read(to_acpi_node(fwnode), propname, DEV_PROP_STRING, val, 1); return -ENXIO; }
/** * fwnode_property_read_string_array - return string array property of a node * @fwnode: Firmware node to get the property of * @propname: Name of the property * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Read an string list property @propname from the given firmware node and store * them to @val if found. * * Return: number of values if @val was %NULL, * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of strings, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_string_array(struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval) { if (is_of_node(fwnode)) return val ? of_property_read_string_array(to_of_node(fwnode), propname, val, nval) : of_property_count_strings(to_of_node(fwnode), propname); else if (is_acpi_node(fwnode)) return acpi_dev_prop_read(to_acpi_node(fwnode), propname, DEV_PROP_STRING, val, nval); return pset_prop_read_array(to_pset(fwnode), propname, DEV_PROP_STRING, val, nval); }
/** * fwnode_get_reference_node - Find the firmware node referenced * @fwnode: Firmware node to get the property from. * @propname: Name of the property * @index: Index of the reference * * Returns referenced fwnode handler pointer, or an NULL if not found */ struct fwnode_handle *fwnode_get_reference_node(struct fwnode_handle *fwnode, const char *propname, int index) { if (is_of_node(fwnode)) { struct device_node *np; np = of_parse_phandle(to_of_node(fwnode), propname, index); if(!np) return NULL; return &np->fwnode; } else if (is_acpi_node(fwnode)) { struct acpi_device *adev; adev = acpi_dev_get_reference_device(to_acpi_device_node(fwnode), propname, index); if(!adev) return NULL; return acpi_fwnode_handle(adev); } return NULL; }
static int __fwnode_property_read_string_array(struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval) { if (is_of_node(fwnode)) return val ? of_property_read_string_array(to_of_node(fwnode), propname, val, nval) : of_property_count_strings(to_of_node(fwnode), propname); else if (is_acpi_node(fwnode)) return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, val, nval); else if (is_pset_node(fwnode)) return val ? pset_prop_read_string_array(to_pset_node(fwnode), propname, val, nval) : pset_prop_count_elems_of_size(to_pset_node(fwnode), propname, sizeof(const char *)); return -ENXIO; }