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498 lines
17 KiB
498 lines
17 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* property.h - Unified device property interface. |
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* |
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* Copyright (C) 2014, Intel Corporation |
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* Authors: Rafael J. Wysocki <[email protected]> |
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* Mika Westerberg <[email protected]> |
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*/ |
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#ifndef _LINUX_PROPERTY_H_ |
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#define _LINUX_PROPERTY_H_ |
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#include <linux/bits.h> |
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#include <linux/fwnode.h> |
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#include <linux/types.h> |
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struct device; |
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enum dev_prop_type { |
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DEV_PROP_U8, |
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DEV_PROP_U16, |
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DEV_PROP_U32, |
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DEV_PROP_U64, |
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DEV_PROP_STRING, |
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DEV_PROP_REF, |
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}; |
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enum dev_dma_attr { |
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DEV_DMA_NOT_SUPPORTED, |
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DEV_DMA_NON_COHERENT, |
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DEV_DMA_COHERENT, |
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}; |
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struct fwnode_handle *dev_fwnode(struct device *dev); |
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bool device_property_present(struct device *dev, const char *propname); |
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int device_property_read_u8_array(struct device *dev, const char *propname, |
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u8 *val, size_t nval); |
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int device_property_read_u16_array(struct device *dev, const char *propname, |
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u16 *val, size_t nval); |
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int device_property_read_u32_array(struct device *dev, const char *propname, |
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u32 *val, size_t nval); |
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int device_property_read_u64_array(struct device *dev, const char *propname, |
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u64 *val, size_t nval); |
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int device_property_read_string_array(struct device *dev, const char *propname, |
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const char **val, size_t nval); |
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int device_property_read_string(struct device *dev, const char *propname, |
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const char **val); |
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int device_property_match_string(struct device *dev, |
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const char *propname, const char *string); |
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bool fwnode_device_is_available(const struct fwnode_handle *fwnode); |
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bool fwnode_property_present(const struct fwnode_handle *fwnode, |
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const char *propname); |
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int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode, |
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const char *propname, u8 *val, |
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size_t nval); |
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int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode, |
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const char *propname, u16 *val, |
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size_t nval); |
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int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode, |
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const char *propname, u32 *val, |
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size_t nval); |
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int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode, |
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const char *propname, u64 *val, |
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size_t nval); |
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int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, |
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const char *propname, const char **val, |
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size_t nval); |
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int fwnode_property_read_string(const struct fwnode_handle *fwnode, |
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const char *propname, const char **val); |
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int fwnode_property_match_string(const struct fwnode_handle *fwnode, |
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const char *propname, const char *string); |
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int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode, |
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const char *prop, const char *nargs_prop, |
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unsigned int nargs, unsigned int index, |
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struct fwnode_reference_args *args); |
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struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, |
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const char *name, |
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unsigned int index); |
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const char *fwnode_get_name(const struct fwnode_handle *fwnode); |
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const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode); |
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struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); |
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struct fwnode_handle *fwnode_get_next_parent( |
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struct fwnode_handle *fwnode); |
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struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode); |
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unsigned int fwnode_count_parents(const struct fwnode_handle *fwn); |
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struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn, |
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unsigned int depth); |
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bool fwnode_is_ancestor_of(struct fwnode_handle *test_ancestor, |
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struct fwnode_handle *test_child); |
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struct fwnode_handle *fwnode_get_next_child_node( |
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const struct fwnode_handle *fwnode, struct fwnode_handle *child); |
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struct fwnode_handle *fwnode_get_next_available_child_node( |
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const struct fwnode_handle *fwnode, struct fwnode_handle *child); |
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#define fwnode_for_each_child_node(fwnode, child) \ |
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for (child = fwnode_get_next_child_node(fwnode, NULL); child; \ |
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child = fwnode_get_next_child_node(fwnode, child)) |
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#define fwnode_for_each_available_child_node(fwnode, child) \ |
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for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\ |
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child = fwnode_get_next_available_child_node(fwnode, child)) |
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struct fwnode_handle *device_get_next_child_node( |
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struct device *dev, struct fwnode_handle *child); |
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#define device_for_each_child_node(dev, child) \ |
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for (child = device_get_next_child_node(dev, NULL); child; \ |
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child = device_get_next_child_node(dev, child)) |
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struct fwnode_handle *fwnode_get_named_child_node( |
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const struct fwnode_handle *fwnode, const char *childname); |
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struct fwnode_handle *device_get_named_child_node(struct device *dev, |
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const char *childname); |
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struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); |
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void fwnode_handle_put(struct fwnode_handle *fwnode); |
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int fwnode_irq_get(struct fwnode_handle *fwnode, unsigned int index); |
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unsigned int device_get_child_node_count(struct device *dev); |
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static inline bool device_property_read_bool(struct device *dev, |
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const char *propname) |
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{ |
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return device_property_present(dev, propname); |
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} |
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static inline int device_property_read_u8(struct device *dev, |
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const char *propname, u8 *val) |
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{ |
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return device_property_read_u8_array(dev, propname, val, 1); |
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} |
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static inline int device_property_read_u16(struct device *dev, |
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const char *propname, u16 *val) |
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{ |
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return device_property_read_u16_array(dev, propname, val, 1); |
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} |
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static inline int device_property_read_u32(struct device *dev, |
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const char *propname, u32 *val) |
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{ |
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return device_property_read_u32_array(dev, propname, val, 1); |
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} |
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static inline int device_property_read_u64(struct device *dev, |
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const char *propname, u64 *val) |
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{ |
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return device_property_read_u64_array(dev, propname, val, 1); |
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} |
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static inline int device_property_count_u8(struct device *dev, const char *propname) |
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{ |
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return device_property_read_u8_array(dev, propname, NULL, 0); |
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} |
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static inline int device_property_count_u16(struct device *dev, const char *propname) |
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{ |
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return device_property_read_u16_array(dev, propname, NULL, 0); |
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} |
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static inline int device_property_count_u32(struct device *dev, const char *propname) |
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{ |
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return device_property_read_u32_array(dev, propname, NULL, 0); |
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} |
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static inline int device_property_count_u64(struct device *dev, const char *propname) |
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{ |
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return device_property_read_u64_array(dev, propname, NULL, 0); |
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} |
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static inline int device_property_string_array_count(struct device *dev, |
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const char *propname) |
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{ |
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return device_property_read_string_array(dev, propname, NULL, 0); |
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} |
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static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_present(fwnode, propname); |
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} |
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static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode, |
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const char *propname, u8 *val) |
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{ |
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return fwnode_property_read_u8_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode, |
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const char *propname, u16 *val) |
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{ |
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return fwnode_property_read_u16_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode, |
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const char *propname, u32 *val) |
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{ |
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return fwnode_property_read_u32_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode, |
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const char *propname, u64 *val) |
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{ |
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return fwnode_property_read_u64_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_read_u8_array(fwnode, propname, NULL, 0); |
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} |
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static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_read_u16_array(fwnode, propname, NULL, 0); |
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} |
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static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_read_u32_array(fwnode, propname, NULL, 0); |
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} |
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static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_read_u64_array(fwnode, propname, NULL, 0); |
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} |
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static inline int |
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fwnode_property_string_array_count(const struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_read_string_array(fwnode, propname, NULL, 0); |
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} |
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struct software_node; |
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/** |
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* struct software_node_ref_args - Reference property with additional arguments |
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* @node: Reference to a software node |
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* @nargs: Number of elements in @args array |
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* @args: Integer arguments |
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*/ |
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struct software_node_ref_args { |
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const struct software_node *node; |
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unsigned int nargs; |
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u64 args[NR_FWNODE_REFERENCE_ARGS]; |
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}; |
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/** |
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* struct property_entry - "Built-in" device property representation. |
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* @name: Name of the property. |
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* @length: Length of data making up the value. |
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* @is_inline: True when the property value is stored inline. |
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* @type: Type of the data in unions. |
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* @pointer: Pointer to the property when it is not stored inline. |
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* @value: Value of the property when it is stored inline. |
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*/ |
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struct property_entry { |
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const char *name; |
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size_t length; |
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bool is_inline; |
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enum dev_prop_type type; |
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union { |
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const void *pointer; |
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union { |
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u8 u8_data[sizeof(u64) / sizeof(u8)]; |
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u16 u16_data[sizeof(u64) / sizeof(u16)]; |
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u32 u32_data[sizeof(u64) / sizeof(u32)]; |
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u64 u64_data[sizeof(u64) / sizeof(u64)]; |
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const char *str[sizeof(u64) / sizeof(char *)]; |
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} value; |
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}; |
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}; |
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/* |
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* Note: the below initializers for the anonymous union are carefully |
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* crafted to avoid gcc-4.4.4's problems with initialization of anon unions |
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* and structs. |
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*/ |
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#define __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_) \ |
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sizeof(((struct property_entry *)NULL)->value._elem_[0]) |
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#define __PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, _elsize_, _Type_, \ |
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_val_, _len_) \ |
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(struct property_entry) { \ |
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.name = _name_, \ |
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.length = (_len_) * (_elsize_), \ |
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.type = DEV_PROP_##_Type_, \ |
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{ .pointer = _val_ }, \ |
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} |
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#define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_)\ |
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__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, \ |
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__PROPERTY_ENTRY_ELEMENT_SIZE(_elem_), \ |
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_Type_, _val_, _len_) |
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#define PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, _len_) \ |
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__PROPERTY_ENTRY_ARRAY_LEN(_name_, u8_data, U8, _val_, _len_) |
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#define PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, _len_) \ |
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__PROPERTY_ENTRY_ARRAY_LEN(_name_, u16_data, U16, _val_, _len_) |
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#define PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, _len_) \ |
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__PROPERTY_ENTRY_ARRAY_LEN(_name_, u32_data, U32, _val_, _len_) |
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#define PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, _len_) \ |
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__PROPERTY_ENTRY_ARRAY_LEN(_name_, u64_data, U64, _val_, _len_) |
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#define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_) \ |
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__PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_) |
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#define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_) \ |
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__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, \ |
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sizeof(struct software_node_ref_args), \ |
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REF, _val_, _len_) |
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#define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) |
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#define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) |
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#define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) |
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#define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) |
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#define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) |
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#define PROPERTY_ENTRY_REF_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) |
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#define __PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_) \ |
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(struct property_entry) { \ |
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.name = _name_, \ |
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.length = __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_), \ |
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.is_inline = true, \ |
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.type = DEV_PROP_##_Type_, \ |
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{ .value = { ._elem_[0] = _val_ } }, \ |
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} |
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#define PROPERTY_ENTRY_U8(_name_, _val_) \ |
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__PROPERTY_ENTRY_ELEMENT(_name_, u8_data, U8, _val_) |
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#define PROPERTY_ENTRY_U16(_name_, _val_) \ |
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__PROPERTY_ENTRY_ELEMENT(_name_, u16_data, U16, _val_) |
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#define PROPERTY_ENTRY_U32(_name_, _val_) \ |
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__PROPERTY_ENTRY_ELEMENT(_name_, u32_data, U32, _val_) |
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#define PROPERTY_ENTRY_U64(_name_, _val_) \ |
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__PROPERTY_ENTRY_ELEMENT(_name_, u64_data, U64, _val_) |
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#define PROPERTY_ENTRY_STRING(_name_, _val_) \ |
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__PROPERTY_ENTRY_ELEMENT(_name_, str, STRING, _val_) |
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#define PROPERTY_ENTRY_BOOL(_name_) \ |
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(struct property_entry) { \ |
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.name = _name_, \ |
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.is_inline = true, \ |
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} |
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#define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \ |
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(struct property_entry) { \ |
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.name = _name_, \ |
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.length = sizeof(struct software_node_ref_args), \ |
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.type = DEV_PROP_REF, \ |
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{ .pointer = &(const struct software_node_ref_args) { \ |
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.node = _ref_, \ |
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.nargs = ARRAY_SIZE(((u64[]){ 0, ##__VA_ARGS__ })) - 1, \ |
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.args = { __VA_ARGS__ }, \ |
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} }, \ |
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} |
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struct property_entry * |
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property_entries_dup(const struct property_entry *properties); |
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void property_entries_free(const struct property_entry *properties); |
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int device_add_properties(struct device *dev, |
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const struct property_entry *properties); |
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void device_remove_properties(struct device *dev); |
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bool device_dma_supported(struct device *dev); |
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enum dev_dma_attr device_get_dma_attr(struct device *dev); |
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const void *device_get_match_data(struct device *dev); |
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int device_get_phy_mode(struct device *dev); |
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void *device_get_mac_address(struct device *dev, char *addr, int alen); |
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int fwnode_get_phy_mode(struct fwnode_handle *fwnode); |
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void *fwnode_get_mac_address(struct fwnode_handle *fwnode, |
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char *addr, int alen); |
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struct fwnode_handle *fwnode_graph_get_next_endpoint( |
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const struct fwnode_handle *fwnode, struct fwnode_handle *prev); |
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struct fwnode_handle * |
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fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode); |
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struct fwnode_handle *fwnode_graph_get_remote_port_parent( |
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const struct fwnode_handle *fwnode); |
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struct fwnode_handle *fwnode_graph_get_remote_port( |
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const struct fwnode_handle *fwnode); |
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struct fwnode_handle *fwnode_graph_get_remote_endpoint( |
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const struct fwnode_handle *fwnode); |
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struct fwnode_handle * |
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fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port, |
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u32 endpoint); |
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static inline bool fwnode_graph_is_endpoint(struct fwnode_handle *fwnode) |
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{ |
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return fwnode_property_present(fwnode, "remote-endpoint"); |
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} |
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/* |
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* Fwnode lookup flags |
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* |
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* @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the |
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* closest endpoint ID greater than the specified |
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* one. |
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* @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote |
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* endpoint of the given endpoint belongs to, |
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* may be disabled. |
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*/ |
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#define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0) |
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#define FWNODE_GRAPH_DEVICE_DISABLED BIT(1) |
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struct fwnode_handle * |
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fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode, |
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u32 port, u32 endpoint, unsigned long flags); |
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#define fwnode_graph_for_each_endpoint(fwnode, child) \ |
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for (child = NULL; \ |
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(child = fwnode_graph_get_next_endpoint(fwnode, child)); ) |
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int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, |
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struct fwnode_endpoint *endpoint); |
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typedef void *(*devcon_match_fn_t)(struct fwnode_handle *fwnode, const char *id, |
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void *data); |
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void *fwnode_connection_find_match(struct fwnode_handle *fwnode, |
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const char *con_id, void *data, |
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devcon_match_fn_t match); |
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static inline void *device_connection_find_match(struct device *dev, |
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const char *con_id, void *data, |
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devcon_match_fn_t match) |
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{ |
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return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match); |
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} |
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/* -------------------------------------------------------------------------- */ |
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/* Software fwnode support - when HW description is incomplete or missing */ |
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/** |
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* struct software_node - Software node description |
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* @name: Name of the software node |
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* @parent: Parent of the software node |
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* @properties: Array of device properties |
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*/ |
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struct software_node { |
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const char *name; |
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const struct software_node *parent; |
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const struct property_entry *properties; |
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}; |
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bool is_software_node(const struct fwnode_handle *fwnode); |
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const struct software_node * |
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to_software_node(const struct fwnode_handle *fwnode); |
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struct fwnode_handle *software_node_fwnode(const struct software_node *node); |
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const struct software_node * |
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software_node_find_by_name(const struct software_node *parent, |
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const char *name); |
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int software_node_register_nodes(const struct software_node *nodes); |
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void software_node_unregister_nodes(const struct software_node *nodes); |
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int software_node_register_node_group(const struct software_node **node_group); |
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void software_node_unregister_node_group(const struct software_node **node_group); |
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int software_node_register(const struct software_node *node); |
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void software_node_unregister(const struct software_node *node); |
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int software_node_notify(struct device *dev, unsigned long action); |
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struct fwnode_handle * |
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fwnode_create_software_node(const struct property_entry *properties, |
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const struct fwnode_handle *parent); |
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void fwnode_remove_software_node(struct fwnode_handle *fwnode); |
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int device_add_software_node(struct device *dev, const struct software_node *node); |
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void device_remove_software_node(struct device *dev); |
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int device_create_managed_software_node(struct device *dev, |
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const struct property_entry *properties, |
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const struct software_node *parent); |
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#endif /* _LINUX_PROPERTY_H_ */
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