drivers/mtd/spi-nor/everspin.c

Source file repositories/reference/linux-study-clean/drivers/mtd/spi-nor/everspin.c

File Facts

System
Linux kernel
Corpus path
drivers/mtd/spi-nor/everspin.c
Extension
.c
Size
1162 bytes
Lines
53
Domain
Driver Families
Bucket
drivers/mtd
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2005, Intec Automation Inc.
 * Copyright (C) 2014, Freescale Semiconductor, Inc.
 */

#include <linux/mtd/spi-nor.h>

#include "core.h"

static const struct flash_info everspin_nor_parts[] = {
	{
		.name = "mr25h128",
		.size = SZ_16K,
		.sector_size = SZ_16K,
		.addr_nbytes = 2,
		.flags = SPI_NOR_NO_ERASE,
	}, {
		.name = "mr25h256",
		.size = SZ_32K,
		.sector_size = SZ_32K,
		.addr_nbytes = 2,
		.flags = SPI_NOR_NO_ERASE,
	}, {
		.name = "mr25h10",
		.size = SZ_128K,
		.sector_size = SZ_128K,
		.flags = SPI_NOR_NO_ERASE,
	}, {
		.name = "mr25h40",
		.size = SZ_512K,
		.sector_size = SZ_512K,
		.flags = SPI_NOR_NO_ERASE,
	}
};

static void everspin_nor_default_init(struct spi_nor *nor)
{
	/* Everspin FRAMs don't support the fast read opcode. */
	nor->params->hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST;
}

static const struct spi_nor_fixups everspin_nor_fixups = {
	.default_init = everspin_nor_default_init,
};

const struct spi_nor_manufacturer spi_nor_everspin = {
	.name = "everspin",
	.parts = everspin_nor_parts,
	.nparts = ARRAY_SIZE(everspin_nor_parts),
	.fixups = &everspin_nor_fixups,
};

Annotation

Implementation Notes