path: root/include/linux/spi/spi.h

/* SPDX-License-Identifier: GPL-2.0-or-later
 *
 * Copyright (C) 2005 David Brownell
 */

#ifndef __LINUX_SPI_H
#define __LINUX_SPI_H

#include <linux/acpi.h>
#include <linux/bits.h>
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/kthread.h>
#include <linux/mod_devicetable.h>
#include <linux/overflow.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/u64_stats_sync.h>

#include <uapi/linux/spi/spi.h>

/* Max no. of CS supported per spi device */
#define SPI_CS_CNT_MAX 16

struct dma_chan;
struct software_node;
struct ptp_system_timestamp;
struct spi_controller;
struct spi_transfer;
struct spi_controller_mem_ops;
struct spi_controller_mem_caps;
struct spi_message;

/*
 * INTERFACES between SPI master-side drivers and SPI slave protocol handlers,
 * and SPI infrastructure.
 */
extern const struct bus_type spi_bus_type;

/**
 * struct spi_statistics - statistics for spi transfers
 * @syncp:         seqcount to protect members in this struct for per-cpu update
 *                 on 32-bit systems
 *
 * @messages:      number of spi-messages handled
 * @transfers:     number of spi_transfers handled
 * @errors:        number of errors during spi_transfer
 * @timedout:      number of timeouts during spi_transfer
 *
 * @spi_sync:      number of times spi_sync is used
 * @spi_sync_immediate:
 *                 number of times spi_sync is executed immediately
 *                 in calling context without que