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* Copyright (C) 2013 STMicroelectronics (R&D) Limited
* Author: Stephen Gallimore <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
#include <linux/device.h>
#include <linux/regmap.h>
#include <linux/reset-controller.h>
* Reset channel description for a system configuration register based
* reset controller.
* @compatible: Compatible string of the syscon regmap containing this
* channel's control and ack (status) bits.
* @reset: Regmap field description of the channel's reset bit.
* @ack: Regmap field description of the channel's acknowledge bit.
struct syscfg_reset_channel_data {
const char *compatible;
struct reg_field reset;
struct reg_field ack;
#define _SYSCFG_RST_CH(_c, _rr, _rb, _ar, _ab) \
{ .compatible = _c, \
.reset = REG_FIELD(_rr, _rb, _rb), \
.ack = REG_FIELD(_ar, _ab, _ab), }
#define _SYSCFG_RST_CH_NO_ACK(_c, _rr, _rb) \
{ .compatible = _c, \
.reset = REG_FIELD(_rr, _rb, _rb), }
* Description of a system configuration register based reset controller.
* @wait_for_ack: The controller will wait for reset assert and de-assert to
* be "ack'd" in a channel's ack field.
* @active_low: Are the resets in this controller active low, i.e. clearing
* the reset bit puts the hardware into reset.
* @nr_channels: The number of reset channels in this controller.
* @channels: An array of reset channel descriptions.
struct syscfg_reset_controller_data {
bool wait_for_ack;
bool active_low;
int nr_channels;
const struct syscfg_reset_channel_data *channels;
* syscfg_reset_probe(): platform device probe function used by syscfg
* reset controller drivers. This registers a reset
* controller configured by the OF match data for
* the compatible device which should be of type
* "struct syscfg_reset_controller_data".
* @pdev: platform device
int syscfg_reset_probe(struct platform_device *pdev);
#endif /* __STI_RESET_SYSCFG_H */