linux/drivers/reset/sti/reset-syscfg.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2013 STMicroelectronics Limited
 * Author: Stephen Gallimore <[email protected]>
 *
 * Inspired by mach-imx/src.c
 */
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/types.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>

#include "reset-syscfg.h"

/**
 * struct syscfg_reset_channel - Reset channel regmap configuration
 *
 * @reset: regmap field for the channel's reset bit.
 * @ack: regmap field for the channel's ack bit (optional).
 */
struct syscfg_reset_channel { … };

/**
 * struct syscfg_reset_controller - A reset controller which groups together
 * a set of related reset bits, which may be located in different system
 * configuration registers.
 *
 * @rst: base reset controller structure.
 * @active_low: are the resets in this controller active low, i.e. clearing
 *              the reset bit puts the hardware into reset.
 * @channels: An array of reset channels for this controller.
 */
struct syscfg_reset_controller { … };

#define to_syscfg_reset_controller(_rst) …

static int syscfg_reset_program_hw(struct reset_controller_dev *rcdev,
				   unsigned long idx, int assert)
{ … }

static int syscfg_reset_assert(struct reset_controller_dev *rcdev,
			       unsigned long idx)
{ … }

static int syscfg_reset_deassert(struct reset_controller_dev *rcdev,
				 unsigned long idx)
{ … }

static int syscfg_reset_dev(struct reset_controller_dev *rcdev,
			    unsigned long idx)
{ … }

static int syscfg_reset_status(struct reset_controller_dev *rcdev,
			       unsigned long idx)
{ … }

static const struct reset_control_ops syscfg_reset_ops = …;

static int syscfg_reset_controller_register(struct device *dev,
				const struct syscfg_reset_controller_data *data)
{ … }

int syscfg_reset_probe(struct platform_device *pdev)
{ … }