/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright ( C ) 2013 STMicroelectronics ( R & D ) Limited
* Author : Stephen Gallimore < stephen . gallimore @ st . com >
*/
#ifndef __STI_RESET_SYSCFG_H
#define __STI_RESET_SYSCFG_H
#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 */
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