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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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35694afc92
Drivers may need to test if a fwnode is a graph endpoint. To avoid hand-written solutions that wouldn't work for all fwnode types, add a new fwnode_graph_is_endpoint() function for this purpose. We don't need to wire it up to different backends for OF and ACPI for now, as the implementation can simply be based on checkout the presence of a remote-endpoint property. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
461 lines
16 KiB
C
461 lines
16 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/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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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(
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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 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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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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|
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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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|
|
|
/* -------------------------------------------------------------------------- */
|
|
/* Software fwnode support - when HW description is incomplete or missing */
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|
|
|
/**
|
|
* 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;
|
|
};
|
|
|
|
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_nodes(const struct software_node *nodes);
|
|
void software_node_unregister_nodes(const struct software_node *nodes);
|
|
|
|
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);
|
|
|
|
int software_node_notify(struct device *dev, unsigned long action);
|
|
|
|
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);
|
|
|
|
#endif /* _LINUX_PROPERTY_H_ */
|