68ef162152
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 <sakari.ailus@linux.intel.com>
(cherry picked from commit 3e3119d308)
Signed-off-by: Brian J Lovin <brian.j.lovin@intel.com>
Brian L: Had to de-constify this commit, and picks are unclean due
to the number of commits skipped for this kernel.
Conflicts:
drivers/acpi/property.c
drivers/base/property.c
include/linux/fwnode.h
BUG=b:64133998
TEST=media device topology shows subdevs registered successfully
TEST=no camera regression
Change-Id: I982255df1aabaadb9de09fc71e6db5c4b99b0e02
Reviewed-on: https://chromium-review.googlesource.com/693682
Commit-Ready: Tomasz Figa <tfiga@chromium.org>
Tested-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
237 lines
7.7 KiB
C
237 lines
7.7 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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/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_MAX,
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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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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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struct fwnode_handle *dev_fwnode(struct device *dev);
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bool fwnode_device_is_available(struct fwnode_handle *fwnode);
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bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
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int fwnode_property_read_u8_array(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(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(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(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(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(struct fwnode_handle *fwnode,
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const char *propname, const char **val);
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int fwnode_property_match_string(struct fwnode_handle *fwnode,
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const char *propname, const char *string);
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int fwnode_property_get_reference_args(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_get_parent(struct fwnode_handle *fwnode);
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struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
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struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *fwnode,
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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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struct fwnode_handle *device_get_next_child_node(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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struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode,
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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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void fwnode_handle_get(struct fwnode_handle *fwnode);
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void fwnode_handle_put(struct fwnode_handle *fwnode);
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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 bool fwnode_property_read_bool(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(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(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(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(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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/**
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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_array: True when the property is an array.
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* @is_string: True when property is a string.
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* @pointer: Pointer to the property (an array of items of the given type).
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* @value: Value of the property (when it is a single item of the given type).
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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_array;
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bool is_string;
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union {
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union {
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void *raw_data;
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u8 *u8_data;
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u16 *u16_data;
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u32 *u32_data;
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u64 *u64_data;
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const char **str;
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} pointer;
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union {
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unsigned long long raw_data;
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u8 u8_data;
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u16 u16_data;
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u32 u32_data;
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u64 u64_data;
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const char *str;
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} value;
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};
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};
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/**
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* struct property_set - Collection of "built-in" device properties.
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* @fwnode: Handle to be pointed to by the fwnode field of struct device.
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* @properties: Array of properties terminated with a null entry.
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*/
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struct property_set {
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struct fwnode_handle fwnode;
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struct property_entry *properties;
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};
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int device_add_property_set(struct device *dev, const struct property_set *pset);
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void device_remove_property_set(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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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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struct fwnode_handle *fwnode_graph_get_next_endpoint(
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struct fwnode_handle *fwnode, struct fwnode_handle *prev);
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struct fwnode_handle *
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fwnode_graph_get_port_parent(struct fwnode_handle *fwnode);
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struct fwnode_handle *fwnode_graph_get_remote_port_parent(
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struct fwnode_handle *fwnode);
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struct fwnode_handle *fwnode_graph_get_remote_port(
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struct fwnode_handle *fwnode);
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struct fwnode_handle *fwnode_graph_get_remote_endpoint(
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struct fwnode_handle *fwnode);
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struct fwnode_handle *fwnode_graph_get_remote_node(struct fwnode_handle *fwnode,
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u32 port, u32 endpoint);
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int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
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struct fwnode_endpoint *endpoint);
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#endif /* _LINUX_PROPERTY_H_ */
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