1 From 0add8e5c60961d2b99174610df8d3d9d6d192b74 Mon Sep 17 00:00:00 2001
2 From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
3 Date: Wed, 7 Nov 2012 14:16:11 +0100
4 Subject: sf: spansion: add support for 4-byte address mode
6 Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
8 --- a/drivers/mtd/spi/spansion.c
9 +++ b/drivers/mtd/spi/spansion.c
12 #include "spi_flash_internal.h"
14 +#define S25FLXX_BRRD 0x16 /* Read Bank Register */
15 +#define S25FLXX_BRWR 0x17 /* Write Bank Register */
16 +#define S25FLXX_BAR_EXTADD (1 << 7) /* Extended address enable */
18 struct spansion_spi_flash_params {
21 @@ -112,6 +116,23 @@ static const struct spansion_spi_flash_p
25 +static __maybe_unused int spansion_set_4byte_mode(struct spi_flash *flash)
27 + struct spi_slave *spi = flash->spi;
32 + err = spi_flash_cmd(spi, cmd, &bar, 1);
36 + bar |= S25FLXX_BAR_EXTADD;
39 + return spi_flash_cmd_write(spi, &cmd, 1, &bar, 1);
42 int spi_flash_probe_spansion(struct spi_flash *flash, u8 *idcode)
44 const struct spansion_spi_flash_params *params;
45 @@ -144,5 +165,10 @@ int spi_flash_probe_spansion(struct spi_
46 flash->sector_size = 256 * params->pages_per_sector;
47 flash->size = flash->sector_size * params->nr_sectors;
49 +#ifdef CONFIG_SPI_FLASH_4BYTE_MODE
50 + if (flash->size > (1 << 24))
51 + flash->set_4byte_mode = spansion_set_4byte_mode;