linux/drivers/spi/spi-dw-bt1.c

// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
//
// Authors:
//   Ramil Zaripov <[email protected]>
//   Serge Semin <[email protected]>
//
// Baikal-T1 DW APB SPI and System Boot SPI driver
//

#include <linux/clk.h>
#include <linux/cpumask.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mux/consumer.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/spi/spi-mem.h>
#include <linux/spi/spi.h>

#include "spi-dw.h"

#define BT1_BOOT_DIRMAP …
#define BT1_BOOT_REGS …

struct dw_spi_bt1 { … };
#define to_dw_spi_bt1(_ctlr) …

dw_spi_bt1_init_cb;

#ifdef CONFIG_SPI_DW_BT1_DIRMAP

static int dw_spi_bt1_dirmap_create(struct spi_mem_dirmap_desc *desc)
{ … }

/*
 * Directly mapped SPI memory region is only accessible in the dword chunks.
 * That's why we have to create a dedicated read-method to copy data from there
 * to the passed buffer.
 */
static void dw_spi_bt1_dirmap_copy_from_map(void *to, void __iomem *from, size_t len)
{ … }

static ssize_t dw_spi_bt1_dirmap_read(struct spi_mem_dirmap_desc *desc,
				      u64 offs, size_t len, void *buf)
{ … }

#endif /* CONFIG_SPI_DW_BT1_DIRMAP */

static int dw_spi_bt1_std_init(struct platform_device *pdev,
			       struct dw_spi_bt1 *dwsbt1)
{ … }

static int dw_spi_bt1_sys_init(struct platform_device *pdev,
			       struct dw_spi_bt1 *dwsbt1)
{ … }

static int dw_spi_bt1_probe(struct platform_device *pdev)
{ … }

static void dw_spi_bt1_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id dw_spi_bt1_of_match[] = …;
MODULE_DEVICE_TABLE(of, dw_spi_bt1_of_match);

static struct platform_driver dw_spi_bt1_driver = …;
module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_IMPORT_NS(…);