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mtd: spi-nor: disable protection for Winbond flash at startup

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In case the flash was locked at boot time.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Brian Norris 2015-09-01 12:57:15 -07:00
parent 357ca38d47
commit c6fc2171b2
1 changed files with 4 additions and 3 deletions
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7
drivers/mtd/spi-nor/spi-nor.c
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@ -1194,13 +1194,14 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
mutex_init(&nor->lock); mutex_init(&nor->lock);
/* /*
* Atmel, SST and Intel/Numonyx serial nor tend to power * Atmel, SST, Intel/Numonyx, and others serial NOR tend to power up
* up with the software protection bits set * with the software protection bits set
*/ */
if (JEDEC_MFR(info) == SNOR_MFR_ATMEL || if (JEDEC_MFR(info) == SNOR_MFR_ATMEL ||
JEDEC_MFR(info) == SNOR_MFR_INTEL || JEDEC_MFR(info) == SNOR_MFR_INTEL ||
JEDEC_MFR(info) == SNOR_MFR_SST) { JEDEC_MFR(info) == SNOR_MFR_SST ||
JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
write_enable(nor); write_enable(nor);
write_sr(nor, 0); write_sr(nor, 0);
} }