From db3e50f3234ba1a477413f56a9e5800a73dca786 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Fri, 21 Jul 2017 14:39:31 +0300 Subject: device property: Get rid of struct fwnode_handle type field Instead of relying on the struct fwnode_handle type field, define fwnode_operations structs for all separate types of fwnodes. To find out the type, compare to the ops field to relevant ops structs. This change has two benefits: 1. it avoids adding the type field to each and every instance of struct fwnode_handle, thus saving memory and 2. makes the ops field the single factor that defines both the types of the fwnode as well as defines the implementation of its operations, decreasing the possibility of bugs when developing code dealing with fwnode internals. Suggested-by: Rob Herring Signed-off-by: Sakari Ailus Reviewed-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- drivers/of/property.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/of/property.c') diff --git a/drivers/of/property.c b/drivers/of/property.c index eda50b4be934..2d5988820405 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -952,3 +952,4 @@ const struct fwnode_operations of_fwnode_ops = { .graph_get_port_parent = of_fwnode_graph_get_port_parent, .graph_parse_endpoint = of_fwnode_graph_parse_endpoint, }; +EXPORT_SYMBOL_GPL(of_fwnode_ops); -- cgit v1.2.3 From 37ba983cfb47cc7b353146422c437468fcb29c61 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Fri, 21 Jul 2017 14:39:36 +0300 Subject: device property: Constify fwnode property API Make fwnode arguments to the fwnode property API const. Signed-off-by: Sakari Ailus Reviewed-by: Rob Herring Signed-off-by: Rafael J. Wysocki --- drivers/acpi/property.c | 52 +++++++++++++++++++++++---------------- drivers/base/property.c | 64 ++++++++++++++++++++++++++---------------------- drivers/of/property.c | 34 +++++++++++++------------ include/linux/acpi.h | 20 ++++++++------- include/linux/fwnode.h | 26 +++++++++++--------- include/linux/property.h | 63 ++++++++++++++++++++++++----------------------- 6 files changed, 142 insertions(+), 117 deletions(-) (limited to 'drivers/of/property.c') diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 043bfcacee66..f8d60051efb8 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -898,7 +898,7 @@ int acpi_node_prop_read(const struct fwnode_handle *fwnode, * @fwnode: Firmware node to find the next child node for. * @child: Handle to one of the device's child nodes or a null handle. */ -struct fwnode_handle *acpi_get_next_subnode(struct fwnode_handle *fwnode, +struct fwnode_handle *acpi_get_next_subnode(const struct fwnode_handle *fwnode, struct fwnode_handle *child) { const struct acpi_device *adev = to_acpi_device_node(fwnode); @@ -967,7 +967,7 @@ struct fwnode_handle *acpi_get_next_subnode(struct fwnode_handle *fwnode, * Returns parent node of an ACPI device or data firmware node or %NULL if * not available. */ -struct fwnode_handle *acpi_node_get_parent(struct fwnode_handle *fwnode) +struct fwnode_handle *acpi_node_get_parent(const struct fwnode_handle *fwnode) { if (is_acpi_data_node(fwnode)) { /* All data nodes have parent pointer so just return that */ @@ -996,8 +996,8 @@ struct fwnode_handle *acpi_node_get_parent(struct fwnode_handle *fwnode) * %NULL if there is no next endpoint, ERR_PTR() in case of error. In case * of success the next endpoint is returned. */ -struct fwnode_handle *acpi_graph_get_next_endpoint(struct fwnode_handle *fwnode, - struct fwnode_handle *prev) +struct fwnode_handle *acpi_graph_get_next_endpoint( + const struct fwnode_handle *fwnode, struct fwnode_handle *prev) { struct fwnode_handle *port = NULL; struct fwnode_handle *endpoint; @@ -1044,7 +1044,8 @@ struct fwnode_handle *acpi_graph_get_next_endpoint(struct fwnode_handle *fwnode, * the child node on success, NULL otherwise. */ static struct fwnode_handle *acpi_graph_get_child_prop_value( - struct fwnode_handle *fwnode, const char *prop_name, unsigned int val) + const struct fwnode_handle *fwnode, const char *prop_name, + unsigned int val) { struct fwnode_handle *child; @@ -1073,17 +1074,18 @@ static struct fwnode_handle *acpi_graph_get_child_prop_value( * fields requested by the caller. Returns %0 in case of success and * negative errno otherwise. */ -int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode, +int acpi_graph_get_remote_endpoint(const struct fwnode_handle *__fwnode, struct fwnode_handle **parent, struct fwnode_handle **port, struct fwnode_handle **endpoint) { + struct fwnode_handle *fwnode; unsigned int port_nr, endpoint_nr; struct acpi_reference_args args; int ret; memset(&args, 0, sizeof(args)); - ret = acpi_node_get_property_reference(fwnode, "remote-endpoint", 0, + ret = acpi_node_get_property_reference(__fwnode, "remote-endpoint", 0, &args); if (ret) return ret; @@ -1125,7 +1127,7 @@ int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode, return 0; } -static bool acpi_fwnode_device_is_available(struct fwnode_handle *fwnode) +static bool acpi_fwnode_device_is_available(const struct fwnode_handle *fwnode) { if (!is_acpi_device_node(fwnode)) return false; @@ -1133,16 +1135,17 @@ static bool acpi_fwnode_device_is_available(struct fwnode_handle *fwnode) return acpi_device_is_present(to_acpi_device_node(fwnode)); } -static bool acpi_fwnode_property_present(struct fwnode_handle *fwnode, +static bool acpi_fwnode_property_present(const 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) +static int +acpi_fwnode_property_read_int_array(const struct fwnode_handle *fwnode, + const char *propname, + unsigned int elem_size, void *val, + size_t nval) { enum dev_prop_type type; @@ -1166,16 +1169,17 @@ static int acpi_fwnode_property_read_int_array(struct fwnode_handle *fwnode, 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) +static int +acpi_fwnode_property_read_string_array(const 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, +acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, const char *childname) { struct fwnode_handle *child; @@ -1192,7 +1196,7 @@ acpi_fwnode_get_named_child_node(struct fwnode_handle *fwnode, } static struct fwnode_handle * -acpi_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode, +acpi_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle *prev) { struct fwnode_handle *endpoint; @@ -1205,7 +1209,7 @@ acpi_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode, } static struct fwnode_handle * -acpi_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) +acpi_fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode) { struct fwnode_handle *endpoint = NULL; @@ -1214,7 +1218,13 @@ acpi_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) return endpoint; } -static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, +static struct fwnode_handle * +acpi_fwnode_get_parent(struct fwnode_handle *fwnode) +{ + return acpi_node_get_parent(fwnode); +} + +static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, struct fwnode_endpoint *endpoint) { struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode); @@ -1242,7 +1252,7 @@ static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, acpi_fwnode_graph_get_next_endpoint, \ .graph_get_remote_endpoint = \ acpi_fwnode_graph_get_remote_endpoint, \ - .graph_get_port_parent = acpi_node_get_parent, \ + .graph_get_port_parent = acpi_fwnode_get_parent, \ .graph_parse_endpoint = acpi_fwnode_graph_parse_endpoint, \ }; \ EXPORT_SYMBOL_GPL(ops) diff --git a/drivers/base/property.c b/drivers/base/property.c index 8fde824ad418..673e2353a2fb 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -193,18 +193,18 @@ struct fwnode_handle *dev_fwnode(struct device *dev) } EXPORT_SYMBOL_GPL(dev_fwnode); -static bool pset_fwnode_property_present(struct fwnode_handle *fwnode, +static bool pset_fwnode_property_present(const struct fwnode_handle *fwnode, const char *propname) { return !!pset_prop_get(to_pset_node(fwnode), propname); } -static int pset_fwnode_read_int_array(struct fwnode_handle *fwnode, +static int pset_fwnode_read_int_array(const struct fwnode_handle *fwnode, const char *propname, unsigned int elem_size, void *val, size_t nval) { - struct property_set *node = to_pset_node(fwnode); + const struct property_set *node = to_pset_node(fwnode); if (!val) return pset_prop_count_elems_of_size(node, propname, elem_size); @@ -223,9 +223,10 @@ static int pset_fwnode_read_int_array(struct fwnode_handle *fwnode, return -ENXIO; } -static int pset_fwnode_property_read_string_array(struct fwnode_handle *fwnode, - const char *propname, - const char **val, size_t nval) +static int +pset_fwnode_property_read_string_array(const struct fwnode_handle *fwnode, + const char *propname, + const char **val, size_t nval) { return pset_prop_read_string_array(to_pset_node(fwnode), propname, val, nval); @@ -255,7 +256,8 @@ EXPORT_SYMBOL_GPL(device_property_present); * @fwnode: Firmware node whose property to check * @propname: Name of the property */ -bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) +bool fwnode_property_present(const struct fwnode_handle *fwnode, + const char *propname) { bool ret; @@ -437,7 +439,7 @@ int device_property_match_string(struct device *dev, const char *propname, } EXPORT_SYMBOL_GPL(device_property_match_string); -static int fwnode_property_read_int_array(struct fwnode_handle *fwnode, +static int fwnode_property_read_int_array(const struct fwnode_handle *fwnode, const char *propname, unsigned int elem_size, void *val, size_t nval) @@ -473,7 +475,7 @@ static int fwnode_property_read_int_array(struct fwnode_handle *fwnode, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ -int fwnode_property_read_u8_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode, const char *propname, u8 *val, size_t nval) { return fwnode_property_read_int_array(fwnode, propname, sizeof(u8), @@ -499,7 +501,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array); * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ -int fwnode_property_read_u16_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode, const char *propname, u16 *val, size_t nval) { return fwnode_property_read_int_array(fwnode, propname, sizeof(u16), @@ -525,7 +527,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array); * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ -int fwnode_property_read_u32_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode, const char *propname, u32 *val, size_t nval) { return fwnode_property_read_int_array(fwnode, propname, sizeof(u32), @@ -551,7 +553,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array); * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ -int fwnode_property_read_u64_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode, const char *propname, u64 *val, size_t nval) { return fwnode_property_read_int_array(fwnode, propname, sizeof(u64), @@ -577,7 +579,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array); * %-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, +int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval) { @@ -609,7 +611,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_string_array); * %-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, +int fwnode_property_read_string(const struct fwnode_handle *fwnode, const char *propname, const char **val) { int ret = fwnode_property_read_string_array(fwnode, propname, val, 1); @@ -633,7 +635,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_string); * %-EPROTO if the property is not an array of strings, * %-ENXIO if no suitable firmware interface is present. */ -int fwnode_property_match_string(struct fwnode_handle *fwnode, +int fwnode_property_match_string(const struct fwnode_handle *fwnode, const char *propname, const char *string) { const char **values; @@ -940,7 +942,7 @@ EXPORT_SYMBOL_GPL(fwnode_get_next_parent); * Return parent firmware node of the given node if possible or %NULL if no * parent was available. */ -struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode) +struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode) { return fwnode_call_ptr_op(fwnode, get_parent); } @@ -951,8 +953,9 @@ EXPORT_SYMBOL_GPL(fwnode_get_parent); * @fwnode: Firmware node to find the next child node for. * @child: Handle to one of the node's child nodes or a %NULL handle. */ -struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *fwnode, - struct fwnode_handle *child) +struct fwnode_handle * +fwnode_get_next_child_node(const struct fwnode_handle *fwnode, + struct fwnode_handle *child) { return fwnode_call_ptr_op(fwnode, get_next_child_node, child); } @@ -983,8 +986,9 @@ EXPORT_SYMBOL_GPL(device_get_next_child_node); * @fwnode: Firmware node to find the named child node for. * @childname: String to match child node name against. */ -struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode, - const char *childname) +struct fwnode_handle * +fwnode_get_named_child_node(const struct fwnode_handle *fwnode, + const char *childname) { return fwnode_call_ptr_op(fwnode, get_named_child_node, childname); } @@ -1030,7 +1034,7 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put); * fwnode_device_is_available - check if a device is available for use * @fwnode: Pointer to the fwnode of the device. */ -bool fwnode_device_is_available(struct fwnode_handle *fwnode) +bool fwnode_device_is_available(const struct fwnode_handle *fwnode) { return fwnode_call_bool_op(fwnode, device_is_available); } @@ -1168,7 +1172,7 @@ EXPORT_SYMBOL(device_get_mac_address); * are available. */ struct fwnode_handle * -fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode, +fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle *prev) { return fwnode_call_ptr_op(fwnode, graph_get_next_endpoint, prev); @@ -1182,7 +1186,7 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint); * Return: the firmware node of the device the @endpoint belongs to. */ struct fwnode_handle * -fwnode_graph_get_port_parent(struct fwnode_handle *endpoint) +fwnode_graph_get_port_parent(const struct fwnode_handle *endpoint) { struct fwnode_handle *port, *parent; @@ -1202,7 +1206,7 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_port_parent); * Extracts firmware node of a remote device the @fwnode points to. */ struct fwnode_handle * -fwnode_graph_get_remote_port_parent(struct fwnode_handle *fwnode) +fwnode_graph_get_remote_port_parent(const struct fwnode_handle *fwnode) { struct fwnode_handle *endpoint, *parent; @@ -1221,7 +1225,8 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port_parent); * * Extracts firmware node of a remote port the @fwnode points to. */ -struct fwnode_handle *fwnode_graph_get_remote_port(struct fwnode_handle *fwnode) +struct fwnode_handle * +fwnode_graph_get_remote_port(const struct fwnode_handle *fwnode) { return fwnode_get_next_parent(fwnode_graph_get_remote_endpoint(fwnode)); } @@ -1234,7 +1239,7 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port); * Extracts firmware node of a remote endpoint the @fwnode points to. */ struct fwnode_handle * -fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) +fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode) { return fwnode_call_ptr_op(fwnode, graph_get_remote_endpoint); } @@ -1249,8 +1254,9 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint); * Return: Remote fwnode handle associated with remote endpoint node linked * to @node. Use fwnode_node_put() on it when done. */ -struct fwnode_handle *fwnode_graph_get_remote_node(struct fwnode_handle *fwnode, - u32 port_id, u32 endpoint_id) +struct fwnode_handle * +fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port_id, + u32 endpoint_id) { struct fwnode_handle *endpoint = NULL; @@ -1286,7 +1292,7 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_node); * information in @endpoint. The caller must hold a reference to * @fwnode. */ -int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, +int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, struct fwnode_endpoint *endpoint) { memset(endpoint, 0, sizeof(*endpoint)); diff --git a/drivers/of/property.c b/drivers/of/property.c index 2d5988820405..ae46a6f0ea36 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -815,23 +815,23 @@ 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, @@ -851,24 +851,26 @@ 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), @@ -876,10 +878,10 @@ 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) @@ -890,7 +892,7 @@ of_fwnode_get_named_child_node(struct fwnode_handle *fwnode, } 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), @@ -898,7 +900,7 @@ 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_parse_phandle(to_of_node(fwnode), "remote-endpoint", 0)); @@ -921,10 +923,10 @@ 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; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 4d9fb610f114..8b9edf87b98d 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1029,13 +1029,14 @@ int acpi_node_prop_read(const struct fwnode_handle *fwnode, int acpi_dev_prop_read(const struct acpi_device *adev, const char *propname, enum dev_prop_type proptype, void *val, size_t nval); -struct fwnode_handle *acpi_get_next_subnode(struct fwnode_handle *fwnode, +struct fwnode_handle *acpi_get_next_subnode(const struct fwnode_handle *fwnode, struct fwnode_handle *child); -struct fwnode_handle *acpi_node_get_parent(struct fwnode_handle *fwnode); +struct fwnode_handle *acpi_node_get_parent(const struct fwnode_handle *fwnode); -struct fwnode_handle *acpi_graph_get_next_endpoint(struct fwnode_handle *fwnode, - struct fwnode_handle *prev); -int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode, +struct fwnode_handle * +acpi_graph_get_next_endpoint(const struct fwnode_handle *fwnode, + struct fwnode_handle *prev); +int acpi_graph_get_remote_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle **remote, struct fwnode_handle **port, struct fwnode_handle **endpoint); @@ -1157,26 +1158,27 @@ static inline int acpi_dev_prop_read(const struct acpi_device *adev, } static inline struct fwnode_handle * -acpi_get_next_subnode(struct fwnode_handle *fwnode, struct fwnode_handle *child) +acpi_get_next_subnode(const struct fwnode_handle *fwnode, + struct fwnode_handle *child) { return NULL; } static inline struct fwnode_handle * -acpi_node_get_parent(struct fwnode_handle *fwnode) +acpi_node_get_parent(const struct fwnode_handle *fwnode) { return NULL; } static inline struct fwnode_handle * -acpi_graph_get_next_endpoint(struct fwnode_handle *fwnode, +acpi_graph_get_next_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle *prev) { return ERR_PTR(-ENXIO); } static inline int -acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode, +acpi_graph_get_remote_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle **remote, struct fwnode_handle **port, struct fwnode_handle **endpoint) diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index c5dbc48b55dd..7b50ee4edcfc 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -55,30 +55,32 @@ struct fwnode_endpoint { struct fwnode_operations { void (*get)(struct fwnode_handle *fwnode); void (*put)(struct fwnode_handle *fwnode); - bool (*device_is_available)(struct fwnode_handle *fwnode); - bool (*property_present)(struct fwnode_handle *fwnode, + bool (*device_is_available)(const struct fwnode_handle *fwnode); + bool (*property_present)(const struct fwnode_handle *fwnode, const char *propname); - int (*property_read_int_array)(struct fwnode_handle *fwnode, + int (*property_read_int_array)(const struct fwnode_handle *fwnode, const char *propname, unsigned int elem_size, void *val, size_t nval); - int (*property_read_string_array)(struct fwnode_handle *fwnode_handle, - const char *propname, - const char **val, size_t nval); - struct fwnode_handle *(*get_parent)(struct fwnode_handle *fwnode); + int + (*property_read_string_array)(const struct fwnode_handle *fwnode_handle, + const char *propname, const char **val, + size_t nval); + struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode); struct fwnode_handle * - (*get_next_child_node)(struct fwnode_handle *fwnode, + (*get_next_child_node)(const struct fwnode_handle *fwnode, struct fwnode_handle *child); struct fwnode_handle * - (*get_named_child_node)(struct fwnode_handle *fwnode, const char *name); + (*get_named_child_node)(const struct fwnode_handle *fwnode, + const char *name); struct fwnode_handle * - (*graph_get_next_endpoint)(struct fwnode_handle *fwnode, + (*graph_get_next_endpoint)(const struct fwnode_handle *fwnode, struct fwnode_handle *prev); struct fwnode_handle * - (*graph_get_remote_endpoint)(struct fwnode_handle *fwnode); + (*graph_get_remote_endpoint)(const struct fwnode_handle *fwnode); struct fwnode_handle * (*graph_get_port_parent)(struct fwnode_handle *fwnode); - int (*graph_parse_endpoint)(struct fwnode_handle *fwnode, + int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode, struct fwnode_endpoint *endpoint); }; diff --git a/include/linux/property.h b/include/linux/property.h index 7e77039e6b81..edff3f89e755 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -51,46 +51,48 @@ int device_property_read_string(struct device *dev, const char *propname, int device_property_match_string(struct device *dev, const char *propname, const char *string); -bool fwnode_device_is_available(struct fwnode_handle *fwnode); -bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname); -int fwnode_property_read_u8_array(struct fwnode_handle *fwnode, +bool fwnode_device_is_available(const struct fwnode_handle *fwnode); +bool fwnode_property_present(const struct fwnode_handle *fwnode, + const char *propname); +int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode, const char *propname, u8 *val, size_t nval); -int fwnode_property_read_u16_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode, const char *propname, u16 *val, size_t nval); -int fwnode_property_read_u32_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode, const char *propname, u32 *val, size_t nval); -int fwnode_property_read_u64_array(struct fwnode_handle *fwnode, +int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode, const char *propname, u64 *val, size_t nval); -int fwnode_property_read_string_array(struct fwnode_handle *fwnode, +int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval); -int fwnode_property_read_string(struct fwnode_handle *fwnode, +int fwnode_property_read_string(const struct fwnode_handle *fwnode, const char *propname, const char **val); -int fwnode_property_match_string(struct fwnode_handle *fwnode, +int fwnode_property_match_string(const struct fwnode_handle *fwnode, const char *propname, const char *string); -struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode); -struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode); -struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *fwnode, - struct fwnode_handle *child); +struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); +struct fwnode_handle *fwnode_get_next_parent( + struct fwnode_handle *fwnode); +struct fwnode_handle *fwnode_get_next_child_node( + const struct fwnode_handle *fwnode, struct fwnode_handle *child); #define fwnode_for_each_child_node(fwnode, child) \ for (child = fwnode_get_next_child_node(fwnode, NULL); child; \ child = fwnode_get_next_child_node(fwnode, child)) -struct fwnode_handle *device_get_next_child_node(struct device *dev, - struct fwnode_handle *child); +struct fwnode_handle *device_get_next_child_node( + struct device *dev, struct fwnode_handle *child); #define device_for_each_child_node(dev, child) \ for (child = device_get_next_child_node(dev, NULL); child; \ child = device_get_next_child_node(dev, child)) -struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode, - const char *childname); +struct fwnode_handle *fwnode_get_named_child_node( + const struct fwnode_handle *fwnode, const char *childname); struct fwnode_handle *device_get_named_child_node(struct device *dev, const char *childname); @@ -129,31 +131,31 @@ static inline int device_property_read_u64(struct device *dev, return device_property_read_u64_array(dev, propname, val, 1); } -static inline bool fwnode_property_read_bool(struct fwnode_handle *fwnode, +static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, const char *propname) { return fwnode_property_present(fwnode, propname); } -static inline int fwnode_property_read_u8(struct fwnode_handle *fwnode, +static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode, const char *propname, u8 *val) { return fwnode_property_read_u8_array(fwnode, propname, val, 1); } -static inline int fwnode_property_read_u16(struct fwnode_handle *fwnode, +static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode, const char *propname, u16 *val) { return fwnode_property_read_u16_array(fwnode, propname, val, 1); } -static inline int fwnode_property_read_u32(struct fwnode_handle *fwnode, +static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode, const char *propname, u32 *val) { return fwnode_property_read_u32_array(fwnode, propname, val, 1); } -static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode, +static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode, const char *propname, u64 *val) { return fwnode_property_read_u64_array(fwnode, propname, val, 1); @@ -274,19 +276,20 @@ int device_get_phy_mode(struct device *dev); void *device_get_mac_address(struct device *dev, char *addr, int alen); struct fwnode_handle *fwnode_graph_get_next_endpoint( - struct fwnode_handle *fwnode, struct fwnode_handle *prev); + const struct fwnode_handle *fwnode, struct fwnode_handle *prev); struct fwnode_handle * -fwnode_graph_get_port_parent(struct fwnode_handle *fwnode); +fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode); struct fwnode_handle *fwnode_graph_get_remote_port_parent( - struct fwnode_handle *fwnode); + const struct fwnode_handle *fwnode); struct fwnode_handle *fwnode_graph_get_remote_port( - struct fwnode_handle *fwnode); + const struct fwnode_handle *fwnode); struct fwnode_handle *fwnode_graph_get_remote_endpoint( - struct fwnode_handle *fwnode); -struct fwnode_handle *fwnode_graph_get_remote_node(struct fwnode_handle *fwnode, - u32 port, u32 endpoint); + const struct fwnode_handle *fwnode); +struct fwnode_handle * +fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port, + u32 endpoint); -int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, +int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, struct fwnode_endpoint *endpoint); #endif /* _LINUX_PROPERTY_H_ */ -- cgit v1.2.3 From 3e3119d3088f41106f3581d39e7694a50ca3fc02 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Fri, 21 Jul 2017 15:11:49 +0300 Subject: device property: Introduce fwnode_property_get_reference_args The new fwnode_property_get_reference_args() interface amends the fwnode property API with the functionality of both of_parse_phandle_with_args() and __acpi_node_get_property_reference(). The semantics is slightly different: the cells property is ignored on ACPI as the number of arguments can be explicitly obtained from the firmware interface. Signed-off-by: Sakari Ailus Signed-off-by: Rafael J. Wysocki --- drivers/acpi/property.c | 27 +++++++++++++++++++++++++++ drivers/base/property.c | 28 ++++++++++++++++++++++++++++ drivers/of/property.c | 31 +++++++++++++++++++++++++++++++ include/linux/fwnode.h | 19 +++++++++++++++++++ include/linux/property.h | 4 ++++ 5 files changed, 109 insertions(+) (limited to 'drivers/of/property.c') diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index f8d60051efb8..681a84312dee 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -1195,6 +1195,32 @@ acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, return NULL; } +static int +acpi_fwnode_get_reference_args(const struct fwnode_handle *fwnode, + const char *prop, const char *nargs_prop, + unsigned int args_count, unsigned int index, + struct fwnode_reference_args *args) +{ + struct acpi_reference_args acpi_args; + unsigned int i; + int ret; + + ret = __acpi_node_get_property_reference(fwnode, prop, index, + args_count, &acpi_args); + if (ret < 0) + return ret; + if (!args) + return 0; + + args->nargs = acpi_args.nargs; + args->fwnode = acpi_fwnode_handle(acpi_args.adev); + + for (i = 0; i < NR_FWNODE_REFERENCE_ARGS; i++) + args->args[i] = i < acpi_args.nargs ? acpi_args.args[i] : 0; + + return 0; +} + static struct fwnode_handle * acpi_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode, struct fwnode_handle *prev) @@ -1248,6 +1274,7 @@ static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, .get_parent = acpi_node_get_parent, \ .get_next_child_node = acpi_get_next_subnode, \ .get_named_child_node = acpi_fwnode_get_named_child_node, \ + .get_reference_args = acpi_fwnode_get_reference_args, \ .graph_get_next_endpoint = \ acpi_fwnode_graph_get_next_endpoint, \ .graph_get_remote_endpoint = \ diff --git a/drivers/base/property.c b/drivers/base/property.c index 673e2353a2fb..d0b65bbe7e15 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -665,6 +665,34 @@ out: } EXPORT_SYMBOL_GPL(fwnode_property_match_string); +/** + * fwnode_property_get_reference_args() - Find a reference with arguments + * @fwnode: Firmware node where to look for the reference + * @prop: The name of the property + * @nargs_prop: The name of the property telling the number of + * arguments in the referred node. NULL if @nargs is known, + * otherwise @nargs is ignored. Only relevant on OF. + * @nargs: Number of arguments. Ignored if @nargs_prop is non-NULL. + * @index: Index of the reference, from zero onwards. + * @args: Result structure with reference and integer arguments. + * + * Obtain a reference based on a named property in an fwnode, with + * integer arguments. + * + * Caller is responsible to call fwnode_handle_put() on the returned + * args->fwnode pointer. + * + */ +int fwnode_property_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) +{ + return fwnode_call_int_op(fwnode, get_reference_args, prop, nargs_prop, + nargs, index, args); +} +EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args); + static int property_copy_string_array(struct property_entry *dst, const struct property_entry *src) { diff --git a/drivers/of/property.c b/drivers/of/property.c index ae46a6f0ea36..3868400972b8 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -891,6 +891,36 @@ of_fwnode_get_named_child_node(const 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(const struct fwnode_handle *fwnode, struct fwnode_handle *prev) @@ -949,6 +979,7 @@ 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, diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 7b50ee4edcfc..0c35b6caf0f6 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -33,6 +33,20 @@ struct fwnode_endpoint { const struct fwnode_handle *local_fwnode; }; +#define NR_FWNODE_REFERENCE_ARGS 8 + +/** + * struct fwnode_reference_args - Fwnode reference with additional arguments + * @fwnode:- A reference to the base fwnode + * @nargs: Number of elements in @args array + * @args: Integer arguments on the fwnode + */ +struct fwnode_reference_args { + struct fwnode_handle *fwnode; + unsigned int nargs; + unsigned int args[NR_FWNODE_REFERENCE_ARGS]; +}; + /** * struct fwnode_operations - Operations for fwnode interface * @get: Get a reference to an fwnode. @@ -46,6 +60,7 @@ struct fwnode_endpoint { * @get_parent: Return the parent of an fwnode. * @get_next_child_node: Return the next child node in an iteration. * @get_named_child_node: Return a child node with a given name. + * @get_reference_args: Return a reference pointed to by a property, with args * @graph_get_next_endpoint: Return an endpoint node in an iteration. * @graph_get_remote_endpoint: Return the remote endpoint node of a local * endpoint node. @@ -73,6 +88,10 @@ struct fwnode_operations { struct fwnode_handle * (*get_named_child_node)(const struct fwnode_handle *fwnode, const char *name); + int (*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 fwnode_handle * (*graph_get_next_endpoint)(const struct fwnode_handle *fwnode, struct fwnode_handle *prev); diff --git a/include/linux/property.h b/include/linux/property.h index edff3f89e755..6bebee13c5e0 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -73,6 +73,10 @@ int fwnode_property_read_string(const struct fwnode_handle *fwnode, const char *propname, const char **val); int fwnode_property_match_string(const struct fwnode_handle *fwnode, const char *propname, const char *string); +int fwnode_property_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 fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); struct fwnode_handle *fwnode_get_next_parent( -- cgit v1.2.3