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mtd: spi-nor: Add the SNOR_F_4B_OPCODES flag 

Some flash_info entries have the SPI_NOR_4B_OPCODES flag set to let the
core know that the flash supports 4B opcode. While this solution works
fine for id-based caps detection, it doesn't work that well when relying
on SFDP-based caps detection. Let's add an SNOR_F_4B_OPCODES flag so
that the SFDP parsing code can set it when appropriate.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
This commit is contained in:
Boris Brezillon 2018-12-06 11:37:34 +01:00
parent 84a1c2109d
commit 548ed6847f
2 changed files with 12 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/mtd/spi-nor/spi-nor.c
View File

@ -3365,6 +3365,7 @@ static int spi_nor_init_params(struct spi_nor *nor,
if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
nor->addr_width = 0;
nor->flags &= ~SNOR_F_4B_OPCODES;
/* restore previous erase map */
memcpy(&nor->erase_map, &prev_map,
sizeof(nor->erase_map));
@ -3665,9 +3666,7 @@ static int spi_nor_init(struct spi_nor *nor)
}
}
if ((nor->addr_width == 4) &&
(JEDEC_MFR(nor->info) != SNOR_MFR_SPANSION) &&
!(nor->info->flags & SPI_NOR_4B_OPCODES)) {
if (nor->addr_width == 4 && !(nor->flags & SNOR_F_4B_OPCODES)) {
/*
* If the RESET# pin isn't hooked up properly, or the system
* otherwise doesn't perform a reset command in the boot
@ -3699,10 +3698,8 @@ static void spi_nor_resume(struct mtd_info *mtd)
void spi_nor_restore(struct spi_nor *nor)
{
/* restore the addressing mode */
if ((nor->addr_width == 4) &&
(JEDEC_MFR(nor->info) != SNOR_MFR_SPANSION) &&
!(nor->info->flags & SPI_NOR_4B_OPCODES) &&
(nor->flags & SNOR_F_BROKEN_RESET))
if (nor->addr_width == 4 && !(nor->flags & SNOR_F_4B_OPCODES) &&
nor->flags & SNOR_F_BROKEN_RESET)
set_4byte(nor, nor->info, 0);
}
EXPORT_SYMBOL_GPL(spi_nor_restore);
@ -3858,13 +3855,17 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
} else if (mtd->size > 0x1000000) {
/* enable 4-byte addressing if the device exceeds 16MiB */
nor->addr_width = 4;
if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
info->flags & SPI_NOR_4B_OPCODES)
spi_nor_set_4byte_opcodes(nor, info);
} else {
nor->addr_width = 3;
}
if (info->flags & SPI_NOR_4B_OPCODES ||
(JEDEC_MFR(info) == SNOR_MFR_SPANSION && mtd->size > SZ_16M))
nor->flags |= SNOR_F_4B_OPCODES;
if (nor->addr_width == 4 && nor->flags & SNOR_F_4B_OPCODES)
spi_nor_set_4byte_opcodes(nor, info);
if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) {
dev_err(dev, "address width is too large: %u\n",
nor->addr_width);

1
include/linux/mtd/spi-nor.h
View File

@ -237,6 +237,7 @@ enum spi_nor_option_flags {
SNOR_F_READY_XSR_RDY = BIT(4),
SNOR_F_USE_CLSR = BIT(5),
SNOR_F_BROKEN_RESET = BIT(6),
SNOR_F_4B_OPCODES = BIT(7),
};
/**