Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_RESET_CONTROLLER_H_
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#define _LINUX_RESET_CONTROLLER_H_
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#include <linux/list.h>
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struct reset_controller_dev;
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/**
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* struct reset_control_ops - reset controller driver callbacks
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*
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* @reset: for self-deasserting resets, does all necessary
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* things to reset the device
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* @assert: manually assert the reset line, if supported
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* @deassert: manually deassert the reset line, if supported
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* @status: return the status of the reset line, if supported
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*/
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struct reset_control_ops {
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int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
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int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
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int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
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int (*status)(struct reset_controller_dev *rcdev, unsigned long id);
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};
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struct module;
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struct device_node;
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struct of_phandle_args;
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/**
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* struct reset_controller_dev - reset controller entity that might
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* provide multiple reset controls
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* @ops: a pointer to device specific struct reset_control_ops
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* @owner: kernel module of the reset controller driver
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* @list: internal list of reset controller devices
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* @reset_control_head: head of internal list of requested reset controls
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* @dev: corresponding driver model device struct
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* @of_node: corresponding device tree node as phandle target
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* @of_args: for reset-gpios controllers: corresponding phandle args with
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* of_node and GPIO number complementing of_node; either this or
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* of_node should be present
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* @of_reset_n_cells: number of cells in reset line specifiers
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* @of_xlate: translation function to translate from specifier as found in the
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* device tree to id as given to the reset control ops, defaults
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* to :c:func:`of_reset_simple_xlate`.
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* @nr_resets: number of reset controls in this reset controller device
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*/
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struct reset_controller_dev {
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const struct reset_control_ops *ops;
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struct module *owner;
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struct list_head list;
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struct list_head reset_control_head;
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struct device *dev;
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struct device_node *of_node;
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const struct of_phandle_args *of_args;
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int of_reset_n_cells;
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int (*of_xlate)(struct reset_controller_dev *rcdev,
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const struct of_phandle_args *reset_spec);
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unsigned int nr_resets;
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};
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#if IS_ENABLED(CONFIG_RESET_CONTROLLER)
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int reset_controller_register(struct reset_controller_dev *rcdev);
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void reset_controller_unregister(struct reset_controller_dev *rcdev);
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struct device;
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int devm_reset_controller_register(struct device *dev,
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struct reset_controller_dev *rcdev);
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#else
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static inline int reset_controller_register(struct reset_controller_dev *rcdev)
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{
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return 0;
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}
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static inline void reset_controller_unregister(struct reset_controller_dev *rcdev)
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{
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}
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static inline int devm_reset_controller_register(struct device *dev,
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struct reset_controller_dev *rcdev)
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{
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return 0;
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}
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#endif
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#endif
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