579 lines
20 KiB
C
579 lines
20 KiB
C
/* 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 <rafael.j.wysocki@intel.com>
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* Mika Westerberg <mika.westerberg@linux.intel.com>
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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/args.h>
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#include <linux/array_size.h>
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#include <linux/bits.h>
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#include <linux/cleanup.h>
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#include <linux/fwnode.h>
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#include <linux/stddef.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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const struct fwnode_handle *__dev_fwnode_const(const struct device *dev);
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struct fwnode_handle *__dev_fwnode(struct device *dev);
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#define dev_fwnode(dev) \
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_Generic((dev), \
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const struct device *: __dev_fwnode_const, \
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struct device *: __dev_fwnode)(dev)
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bool device_property_present(const struct device *dev, const char *propname);
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int device_property_read_u8_array(const 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(const 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(const 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(const 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(const 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(const struct device *dev, const char *propname,
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const char **val);
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int device_property_match_string(const struct device *dev,
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const char *propname, const char *string);
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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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bool fwnode_device_is_available(const struct fwnode_handle *fwnode);
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static inline bool fwnode_device_is_big_endian(const struct fwnode_handle *fwnode)
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{
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if (fwnode_property_present(fwnode, "big-endian"))
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return true;
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if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) &&
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fwnode_property_present(fwnode, "native-endian"))
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return true;
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return false;
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}
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static inline
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bool fwnode_device_is_compatible(const struct fwnode_handle *fwnode, const char *compat)
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{
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return fwnode_property_match_string(fwnode, "compatible", compat) >= 0;
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}
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/**
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* device_is_big_endian - check if a device has BE registers
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* @dev: Pointer to the struct device
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*
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* Returns: true if the device has a "big-endian" property, or if the kernel
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* was compiled for BE *and* the device has a "native-endian" property.
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* Returns false otherwise.
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*
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* Callers would nominally use ioread32be/iowrite32be if
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* device_is_big_endian() == true, or readl/writel otherwise.
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*/
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static inline bool device_is_big_endian(const struct device *dev)
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{
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return fwnode_device_is_big_endian(dev_fwnode(dev));
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}
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/**
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* device_is_compatible - match 'compatible' property of the device with a given string
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* @dev: Pointer to the struct device
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* @compat: The string to match 'compatible' property with
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*
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* Returns: true if matches, otherwise false.
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*/
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static inline bool device_is_compatible(const struct device *dev, const char *compat)
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{
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return fwnode_device_is_compatible(dev_fwnode(dev), compat);
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}
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int fwnode_property_match_property_string(const struct fwnode_handle *fwnode,
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const char *propname,
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const char * const *array, size_t n);
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static inline
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int device_property_match_property_string(const struct device *dev,
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const char *propname,
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const char * const *array, size_t n)
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{
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return fwnode_property_match_property_string(dev_fwnode(dev), propname, array, n);
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}
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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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bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name);
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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(struct fwnode_handle *fwnode);
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#define fwnode_for_each_parent_node(fwnode, parent) \
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for (parent = fwnode_get_parent(fwnode); parent; \
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parent = fwnode_get_next_parent(parent))
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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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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(const struct device *dev,
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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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#define device_for_each_child_node_scoped(dev, child) \
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for (struct fwnode_handle *child __free(fwnode_handle) = \
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device_get_next_child_node(dev, NULL); \
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child; child = device_get_next_child_node(dev, child))
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struct fwnode_handle *fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
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const char *childname);
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struct fwnode_handle *device_get_named_child_node(const 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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/**
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* fwnode_handle_put - Drop reference to a device node
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* @fwnode: Pointer to the device node to drop the reference to.
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*
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* This has to be used when terminating device_for_each_child_node() iteration
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* with break or return to prevent stale device node references from being left
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* behind.
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*/
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static inline void fwnode_handle_put(struct fwnode_handle *fwnode)
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{
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fwnode_call_void_op(fwnode, put);
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}
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DEFINE_FREE(fwnode_handle, struct fwnode_handle *, fwnode_handle_put(_T))
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int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);
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int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name);
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unsigned int device_get_child_node_count(const struct device *dev);
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static inline bool device_property_read_bool(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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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#define SOFTWARE_NODE_REFERENCE(_ref_, ...) \
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(const struct software_node_ref_args) { \
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.node = _ref_, \
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.nargs = COUNT_ARGS(__VA_ARGS__), \
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.args = { __VA_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_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_) \
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(struct property_entry) { \
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.name = _name_, \
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.length = (_len_) * sizeof_field(struct property_entry, value._elem_[0]), \
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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_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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(struct property_entry) { \
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.name = _name_, \
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.length = (_len_) * sizeof(struct software_node_ref_args), \
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.type = DEV_PROP_REF, \
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{ .pointer = _val_ }, \
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}
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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 = sizeof_field(struct property_entry, value._elem_[0]), \
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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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|
|
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#define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \
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|
(struct property_entry) { \
|
|
.name = _name_, \
|
|
.length = sizeof(struct software_node_ref_args), \
|
|
.type = DEV_PROP_REF, \
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|
{ .pointer = &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__), }, \
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|
}
|
|
|
|
#define PROPERTY_ENTRY_BOOL(_name_) \
|
|
(struct property_entry) { \
|
|
.name = _name_, \
|
|
.is_inline = true, \
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|
}
|
|
|
|
struct property_entry *
|
|
property_entries_dup(const struct property_entry *properties);
|
|
void property_entries_free(const struct property_entry *properties);
|
|
|
|
bool device_dma_supported(const struct device *dev);
|
|
enum dev_dma_attr device_get_dma_attr(const struct device *dev);
|
|
|
|
const void *device_get_match_data(const struct device *dev);
|
|
|
|
int device_get_phy_mode(struct device *dev);
|
|
int fwnode_get_phy_mode(const struct fwnode_handle *fwnode);
|
|
|
|
void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index);
|
|
|
|
struct fwnode_handle *fwnode_graph_get_next_endpoint(
|
|
const struct fwnode_handle *fwnode, struct fwnode_handle *prev);
|
|
struct fwnode_handle *
|
|
fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *fwnode_graph_get_remote_port_parent(
|
|
const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *fwnode_graph_get_remote_port(
|
|
const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *fwnode_graph_get_remote_endpoint(
|
|
const struct fwnode_handle *fwnode);
|
|
|
|
static inline bool fwnode_graph_is_endpoint(const struct fwnode_handle *fwnode)
|
|
{
|
|
return fwnode_property_present(fwnode, "remote-endpoint");
|
|
}
|
|
|
|
/*
|
|
* Fwnode lookup flags
|
|
*
|
|
* @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the
|
|
* closest endpoint ID greater than the specified
|
|
* one.
|
|
* @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote
|
|
* endpoint of the given endpoint belongs to,
|
|
* may be disabled, or that the endpoint is not
|
|
* connected.
|
|
*/
|
|
#define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0)
|
|
#define FWNODE_GRAPH_DEVICE_DISABLED BIT(1)
|
|
|
|
struct fwnode_handle *
|
|
fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
|
|
u32 port, u32 endpoint, unsigned long flags);
|
|
unsigned int fwnode_graph_get_endpoint_count(const struct fwnode_handle *fwnode,
|
|
unsigned long flags);
|
|
|
|
#define fwnode_graph_for_each_endpoint(fwnode, child) \
|
|
for (child = fwnode_graph_get_next_endpoint(fwnode, NULL); child; \
|
|
child = fwnode_graph_get_next_endpoint(fwnode, child))
|
|
|
|
int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
|
|
struct fwnode_endpoint *endpoint);
|
|
|
|
typedef void *(*devcon_match_fn_t)(const struct fwnode_handle *fwnode, const char *id,
|
|
void *data);
|
|
|
|
void *fwnode_connection_find_match(const struct fwnode_handle *fwnode,
|
|
const char *con_id, void *data,
|
|
devcon_match_fn_t match);
|
|
|
|
static inline void *device_connection_find_match(const struct device *dev,
|
|
const char *con_id, void *data,
|
|
devcon_match_fn_t match)
|
|
{
|
|
return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match);
|
|
}
|
|
|
|
int fwnode_connection_find_matches(const struct fwnode_handle *fwnode,
|
|
const char *con_id, void *data,
|
|
devcon_match_fn_t match,
|
|
void **matches, unsigned int matches_len);
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
/* Software fwnode support - when HW description is incomplete or missing */
|
|
|
|
/**
|
|
* struct software_node - Software node description
|
|
* @name: Name of the software node
|
|
* @parent: Parent of the software node
|
|
* @properties: Array of device properties
|
|
*/
|
|
struct software_node {
|
|
const char *name;
|
|
const struct software_node *parent;
|
|
const struct property_entry *properties;
|
|
};
|
|
|
|
#define SOFTWARE_NODE(_name_, _properties_, _parent_) \
|
|
(struct software_node) { \
|
|
.name = _name_, \
|
|
.properties = _properties_, \
|
|
.parent = _parent_, \
|
|
}
|
|
|
|
bool is_software_node(const struct fwnode_handle *fwnode);
|
|
const struct software_node *
|
|
to_software_node(const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *software_node_fwnode(const struct software_node *node);
|
|
|
|
const struct software_node *
|
|
software_node_find_by_name(const struct software_node *parent,
|
|
const char *name);
|
|
|
|
int software_node_register_node_group(const struct software_node **node_group);
|
|
void software_node_unregister_node_group(const struct software_node **node_group);
|
|
|
|
int software_node_register(const struct software_node *node);
|
|
void software_node_unregister(const struct software_node *node);
|
|
|
|
struct fwnode_handle *
|
|
fwnode_create_software_node(const struct property_entry *properties,
|
|
const struct fwnode_handle *parent);
|
|
void fwnode_remove_software_node(struct fwnode_handle *fwnode);
|
|
|
|
int device_add_software_node(struct device *dev, const struct software_node *node);
|
|
void device_remove_software_node(struct device *dev);
|
|
|
|
int device_create_managed_software_node(struct device *dev,
|
|
const struct property_entry *properties,
|
|
const struct software_node *parent);
|
|
|
|
#endif /* _LINUX_PROPERTY_H_ */
|