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35 lines
1.1 KiB
35 lines
1.1 KiB
From: Felix Fietkau <nbd@openwrt.org>
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Date: Thu, 26 Nov 2015 17:03:46 +0100
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Subject: [PATCH] Revert "mtd: spi-nor: disable protection for Winbond flash at
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startup"
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This reverts commit c6fc2171b249e73745c497b578b417a2946f1b2f.
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This commit is breaking read access on at least s25fl064k, but also
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possibly other Spansion flash chips.
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Any mtd read seems to succeed, but simply returns a zero-filled buffer.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/drivers/mtd/spi-nor/spi-nor.c
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+++ b/drivers/mtd/spi-nor/spi-nor.c
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@@ -1194,14 +1194,13 @@ int spi_nor_scan(struct spi_nor *nor, co
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mutex_init(&nor->lock);
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/*
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- * Atmel, SST, Intel/Numonyx, and others serial NOR tend to power up
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- * with the software protection bits set
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+ * Atmel, SST and Intel/Numonyx serial nor tend to power
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+ * up with the software protection bits set
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*/
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if (JEDEC_MFR(info) == SNOR_MFR_ATMEL ||
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JEDEC_MFR(info) == SNOR_MFR_INTEL ||
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- JEDEC_MFR(info) == SNOR_MFR_SST ||
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- JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
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+ JEDEC_MFR(info) == SNOR_MFR_SST) {
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write_enable(nor);
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write_sr(nor, 0);
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}
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