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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Copyright (C) 2013 STMicroelectronics (R&D) Limited4 * Author: Stephen Gallimore <stephen.gallimore@st.com>5 */6#ifndef __STI_RESET_SYSCFG_H7#define __STI_RESET_SYSCFG_H8 9#include <linux/device.h>10#include <linux/regmap.h>11#include <linux/reset-controller.h>12 13/**14 * Reset channel description for a system configuration register based15 * reset controller.16 *17 * @compatible: Compatible string of the syscon regmap containing this18 * channel's control and ack (status) bits.19 * @reset: Regmap field description of the channel's reset bit.20 * @ack: Regmap field description of the channel's acknowledge bit.21 */22struct syscfg_reset_channel_data {23 const char *compatible;24 struct reg_field reset;25 struct reg_field ack;26};27 28#define _SYSCFG_RST_CH(_c, _rr, _rb, _ar, _ab) \29 { .compatible = _c, \30 .reset = REG_FIELD(_rr, _rb, _rb), \31 .ack = REG_FIELD(_ar, _ab, _ab), }32 33#define _SYSCFG_RST_CH_NO_ACK(_c, _rr, _rb) \34 { .compatible = _c, \35 .reset = REG_FIELD(_rr, _rb, _rb), }36 37/**38 * Description of a system configuration register based reset controller.39 *40 * @wait_for_ack: The controller will wait for reset assert and de-assert to41 * be "ack'd" in a channel's ack field.42 * @active_low: Are the resets in this controller active low, i.e. clearing43 * the reset bit puts the hardware into reset.44 * @nr_channels: The number of reset channels in this controller.45 * @channels: An array of reset channel descriptions.46 */47struct syscfg_reset_controller_data {48 bool wait_for_ack;49 bool active_low;50 int nr_channels;51 const struct syscfg_reset_channel_data *channels;52};53 54/**55 * syscfg_reset_probe(): platform device probe function used by syscfg56 * reset controller drivers. This registers a reset57 * controller configured by the OF match data for58 * the compatible device which should be of type59 * "struct syscfg_reset_controller_data".60 *61 * @pdev: platform device62 */63int syscfg_reset_probe(struct platform_device *pdev);64 65#endif /* __STI_RESET_SYSCFG_H */66