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92 lines
3.1 KiB
92 lines
3.1 KiB
/* 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_control_lookup - represents a single lookup entry |
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* |
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* @list: internal list of all reset lookup entries |
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* @provider: name of the reset controller device controlling this reset line |
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* @index: ID of the reset controller in the reset controller device |
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* @dev_id: name of the device associated with this reset line |
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* @con_id: name of the reset line (can be NULL) |
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*/ |
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struct reset_control_lookup { |
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struct list_head list; |
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const char *provider; |
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unsigned int index; |
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const char *dev_id; |
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const char *con_id; |
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}; |
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#define RESET_LOOKUP(_provider, _index, _dev_id, _con_id) \ |
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{ \ |
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.provider = _provider, \ |
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.index = _index, \ |
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.dev_id = _dev_id, \ |
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.con_id = _con_id, \ |
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} |
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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_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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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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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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void reset_controller_add_lookup(struct reset_control_lookup *lookup, |
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unsigned int num_entries); |
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#endif
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