mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 23:02:59 +00:00
bcd90cb692
Add a new internal function, device_ofdata_to_platdata() to handle allocating private space associated with each device and reading the platform data from the device tree. Call this new function from device_probe(). Signed-off-by: Simon Glass <sjg@chromium.org>
235 lines
7.1 KiB
C
235 lines
7.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2013 Google, Inc
|
|
*
|
|
* (C) Copyright 2012
|
|
* Pavel Herrmann <morpheus.ibis@gmail.com>
|
|
* Marek Vasut <marex@denx.de>
|
|
*/
|
|
|
|
#ifndef _DM_DEVICE_INTERNAL_H
|
|
#define _DM_DEVICE_INTERNAL_H
|
|
|
|
#include <dm/ofnode.h>
|
|
|
|
struct device_node;
|
|
struct udevice;
|
|
|
|
/**
|
|
* device_bind() - Create a device and bind it to a driver
|
|
*
|
|
* Called to set up a new device attached to a driver. The device will either
|
|
* have platdata, or a device tree node which can be used to create the
|
|
* platdata.
|
|
*
|
|
* Once bound a device exists but is not yet active until device_probe() is
|
|
* called.
|
|
*
|
|
* @parent: Pointer to device's parent, under which this driver will exist
|
|
* @drv: Device's driver
|
|
* @name: Name of device (e.g. device tree node name)
|
|
* @platdata: Pointer to data for this device - the structure is device-
|
|
* specific but may include the device's I/O address, etc.. This is NULL for
|
|
* devices which use device tree.
|
|
* @of_offset: Offset of device tree node for this device. This is -1 for
|
|
* devices which don't use device tree.
|
|
* @devp: if non-NULL, returns a pointer to the bound device
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_bind(struct udevice *parent, const struct driver *drv,
|
|
const char *name, void *platdata, int of_offset,
|
|
struct udevice **devp);
|
|
|
|
int device_bind_ofnode(struct udevice *parent, const struct driver *drv,
|
|
const char *name, void *platdata, ofnode node,
|
|
struct udevice **devp);
|
|
|
|
/**
|
|
* device_bind_with_driver_data() - Create a device and bind it to a driver
|
|
*
|
|
* Called to set up a new device attached to a driver, in the case where the
|
|
* driver was matched to the device by means of a match table that provides
|
|
* driver_data.
|
|
*
|
|
* Once bound a device exists but is not yet active until device_probe() is
|
|
* called.
|
|
*
|
|
* @parent: Pointer to device's parent, under which this driver will exist
|
|
* @drv: Device's driver
|
|
* @name: Name of device (e.g. device tree node name)
|
|
* @driver_data: The driver_data field from the driver's match table.
|
|
* @node: Device tree node for this device. This is invalid for devices which
|
|
* don't use device tree.
|
|
* @devp: if non-NULL, returns a pointer to the bound device
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_bind_with_driver_data(struct udevice *parent,
|
|
const struct driver *drv, const char *name,
|
|
ulong driver_data, ofnode node,
|
|
struct udevice **devp);
|
|
/**
|
|
* device_bind_by_name: Create a device and bind it to a driver
|
|
*
|
|
* This is a helper function used to bind devices which do not use device
|
|
* tree.
|
|
*
|
|
* @parent: Pointer to device's parent
|
|
* @pre_reloc_only: If true, bind the driver only if its DM_FLAG_PRE_RELOC flag
|
|
* is set. If false bind the driver always.
|
|
* @info: Name and platdata for this device
|
|
* @devp: if non-NULL, returns a pointer to the bound device
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
|
|
const struct driver_info *info, struct udevice **devp);
|
|
|
|
/**
|
|
* device_ofdata_to_platdata() - Read platform data for a device
|
|
*
|
|
* Read platform data for a device (typically from the device tree) so that
|
|
* the information needed to probe the device is present.
|
|
*
|
|
* This may cause some others devices to be probed if this one depends on them,
|
|
* e.g. a GPIO line will cause a GPIO device to be probed.
|
|
*
|
|
* All private data associated with the device is allocated.
|
|
*
|
|
* @dev: Pointer to device to process
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_ofdata_to_platdata(struct udevice *dev);
|
|
|
|
/**
|
|
* device_probe() - Probe a device, activating it
|
|
*
|
|
* Activate a device so that it is ready for use. All its parents are probed
|
|
* first.
|
|
*
|
|
* @dev: Pointer to device to probe
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_probe(struct udevice *dev);
|
|
|
|
/**
|
|
* device_remove() - Remove a device, de-activating it
|
|
*
|
|
* De-activate a device so that it is no longer ready for use. All its
|
|
* children are deactivated first.
|
|
*
|
|
* @dev: Pointer to device to remove
|
|
* @flags: Flags for selective device removal (DM_REMOVE_...)
|
|
* @return 0 if OK, -ve on error (an error here is normally a very bad thing)
|
|
*/
|
|
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
|
|
int device_remove(struct udevice *dev, uint flags);
|
|
#else
|
|
static inline int device_remove(struct udevice *dev, uint flags) { return 0; }
|
|
#endif
|
|
|
|
/**
|
|
* device_unbind() - Unbind a device, destroying it
|
|
*
|
|
* Unbind a device and remove all memory used by it
|
|
*
|
|
* @dev: Pointer to device to unbind
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
|
|
int device_unbind(struct udevice *dev);
|
|
#else
|
|
static inline int device_unbind(struct udevice *dev) { return 0; }
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
|
|
void device_free(struct udevice *dev);
|
|
#else
|
|
static inline void device_free(struct udevice *dev) {}
|
|
#endif
|
|
|
|
/**
|
|
* device_chld_unbind() - Unbind all device's children from the device if bound
|
|
* to drv
|
|
*
|
|
* On error, the function continues to unbind all children, and reports the
|
|
* first error.
|
|
*
|
|
* @dev: The device that is to be stripped of its children
|
|
* @drv: The targeted driver
|
|
* @return 0 on success, -ve on error
|
|
*/
|
|
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
|
|
int device_chld_unbind(struct udevice *dev, struct driver *drv);
|
|
#else
|
|
static inline int device_chld_unbind(struct udevice *dev, struct driver *drv)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* device_chld_remove() - Stop all device's children
|
|
* @dev: The device whose children are to be removed
|
|
* @drv: The targeted driver
|
|
* @flags: Flag, if this functions is called in the pre-OS stage
|
|
* @return 0 on success, -ve on error
|
|
*/
|
|
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
|
|
int device_chld_remove(struct udevice *dev, struct driver *drv,
|
|
uint flags);
|
|
#else
|
|
static inline int device_chld_remove(struct udevice *dev, struct driver *drv,
|
|
uint flags)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* simple_bus_translate() - translate a bus address to a system address
|
|
*
|
|
* This handles the 'ranges' property in a simple bus. It translates the
|
|
* device address @addr to a system address using this property.
|
|
*
|
|
* @dev: Simple bus device (parent of target device)
|
|
* @addr: Address to translate
|
|
* @return new address
|
|
*/
|
|
fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr);
|
|
|
|
/* Cast away any volatile pointer */
|
|
#define DM_ROOT_NON_CONST (((gd_t *)gd)->dm_root)
|
|
#define DM_UCLASS_ROOT_NON_CONST (((gd_t *)gd)->uclass_root)
|
|
|
|
/* device resource management */
|
|
#ifdef CONFIG_DEVRES
|
|
|
|
/**
|
|
* devres_release_probe - Release managed resources allocated after probing
|
|
* @dev: Device to release resources for
|
|
*
|
|
* Release all resources allocated for @dev when it was probed or later.
|
|
* This function is called on driver removal.
|
|
*/
|
|
void devres_release_probe(struct udevice *dev);
|
|
|
|
/**
|
|
* devres_release_all - Release all managed resources
|
|
* @dev: Device to release resources for
|
|
*
|
|
* Release all resources associated with @dev. This function is
|
|
* called on driver unbinding.
|
|
*/
|
|
void devres_release_all(struct udevice *dev);
|
|
|
|
#else /* ! CONFIG_DEVRES */
|
|
|
|
static inline void devres_release_probe(struct udevice *dev)
|
|
{
|
|
}
|
|
|
|
static inline void devres_release_all(struct udevice *dev)
|
|
{
|
|
}
|
|
|
|
#endif /* ! CONFIG_DEVRES */
|
|
#endif
|