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Subject[PATCH 1/3] mtd: m25p80: disable SST software protection bits by default
Date
From: Graf Yang <graf.yang@analog.com>

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>
---
drivers/mtd/devices/m25p80.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 379c316..933267a 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -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);
}
--
1.6.5.rc2


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