84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016 Maxime Ripard. All rights reserved.
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*/
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#ifndef _HAL_RESET_H_
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#define _HAL_RESET_H_
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#include <aw_list.h>
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#include <sunxi_hal_common.h>
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#include <platform_rst.h>
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typedef enum {
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HAL_SUNXI_RESET = 0,
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HAL_SUNXI_R_RESET,
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HAL_SUNXI_RESET_NUMBER,
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} hal_reset_type_t;
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typedef u32 hal_reset_id_t;
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struct reset_control_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_control_dev *rcdev, hal_reset_id_t id);
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int (*assert)(struct reset_control_dev *rcdev, hal_reset_id_t id);
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int (*deassert)(struct reset_control_dev *rcdev, hal_reset_id_t id);
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int (*status)(struct reset_control_dev *rcdev, hal_reset_id_t id);
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};
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/**
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* struct reset_control - 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
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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_control_dev {
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const struct reset_control_ops *ops;
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hal_reset_type_t type;
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u32 nr_resets;
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struct list_head node;
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};
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struct reset_control {
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struct reset_control_dev *rcdev;
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u32 enable_count;
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hal_reset_id_t id;
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};
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int reset_control_register(struct reset_control_dev *rcdev); //for reset system
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int reset_control_unregister(struct reset_control *reset); //for reset system
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struct reset_control *hal_reset_control_get(hal_reset_type_t type, hal_reset_id_t id);
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int hal_reset_control_put(struct reset_control *reset);
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int hal_reset_control_set(struct reset_control *reset); //for other module
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int hal_reset_control_deassert(struct reset_control *reset); //for other module
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int hal_reset_control_assert(struct reset_control *reset); //for other_module
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int hal_reset_control_reset(struct reset_control *reset); //for other_module
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int hal_reset_control_status(struct reset_control *reset); //for other_module
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#endif
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