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| author |   Hou Zhiqiang <Zhiqiang.Hou@nxp.com> | 2017-12-06 10:53:41 +0800 |
|---|---|---|
| committer |   Cyrille Pitchen <cyrille.pitchen@wedev4u.fr> | 2017-12-13 00:36:00 +0100 |
| commit | 8dee1d971af9af2f7b5f54c2eac4ebd04c5c237c (patch) | |
| tree | 72bdb63f2ed5a58b2e809f385c92b1b61edaefb1 /drivers/mtd/spi-nor | |
| parent | mtd: spi-nor: Check that BP bits are set properly (diff) | |
| download | linux-dev-8dee1d971af9af2f7b5f54c2eac4ebd04c5c237c.tar.xz linux-dev-8dee1d971af9af2f7b5f54c2eac4ebd04c5c237c.zip | |
mtd: spi-nor: add an API to restore the status of SPI flash chip
Add this API to restore the status of SPI flash chip to the default
such as addressing mode, whenever detach the driver from device or
reboot the system.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Diffstat (limited to 'drivers/mtd/spi-nor')
| -rw-r--r-- | drivers/mtd/spi-nor/spi-nor.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 1e4b4dfe26b5..9178139a39d0 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -2740,6 +2740,16 @@ static void spi_nor_resume(struct mtd_info *mtd) dev_err(dev, "resume() failed\n"); } +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)) + set_4byte(nor, nor->info, 0); +} +EXPORT_SYMBOL_GPL(spi_nor_restore); + int spi_nor_scan(struct spi_nor *nor, const char *name, const struct spi_nor_hwcaps *hwcaps) { |