/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2013 Google, Inc * * (C) Copyright 2012 * Pavel Herrmann * Marek Vasut */ #ifndef _DM_DEVICE_INTERNAL_H #define _DM_DEVICE_INTERNAL_H #include 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. * @ofnode: Devicetree node for this device. This is ofnode_null() for * devices which don't use devicetree or don't have a node. * @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, 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_reparent: reparent the device to a new parent * * @dev: pointer to device to be reparented * @new_parent: pointer to new parent device * @return 0 if OK, -ve on error */ int device_reparent(struct udevice *dev, struct udevice *new_parent); /** * 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