mirror of https://gitee.com/openkylin/linux.git
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/* 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 */
|