Patchwork mtd: m25p80: disable SST software protection bits by default

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Submitter Mike Frysinger
Date Sept. 24, 2009, 7:46 p.m.
Message ID <1253821582-26331-1-git-send-email-vapier@gentoo.org>
Download mbox | patch
Permalink /patch/34234/
State Superseded, archived
Headers show

Comments

Mike Frysinger - Sept. 24, 2009, 7:46 p.m.
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>
---
i could have sworn i sent this out, but i cant find it in my e-mail log

 drivers/mtd/devices/m25p80.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

Patch

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);
 	}