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mtd: m25p80: disable SST software protection bits by default

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The SST SPI flashes is like Atmel SPI flashes in that the software
protection bits are set by default at power up, so clear them at init
time.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Graf Yang 2009-09-24 15:46:22 -04:00 committed by David Woodhouse
parent de19d02b73
commit ea60658a08
1 changed files with 4 additions and 3 deletions
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7
drivers/mtd/devices/m25p80.c
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@ -775,11 +775,12 @@ static int __devinit m25p_probe(struct spi_device *spi)
dev_set_drvdata(&spi->dev, flash);
/*
* Atmel serial flash tend to power up
* with the software protection bits set
* Atmel and SST serial flash tend to power
* up with the software protection bits set
*/
if (info->jedec_id >> 16 == 0x1f) {
if (info->jedec_id >> 16 == 0x1f ||
info->jedec_id >> 16 == 0xbf) {
write_enable(flash);
write_sr(flash, 0);
}