5afedc67e2
This fixes the issues with the jffs2 images on various boards. Using JFFS2 on devices with 4KiB erase sectors is not safe: http://lists.infradead.org/pipermail/linux-mtd/2011-June/036591.html SVN-Revision: 29521
42 lines
1.2 KiB
Diff
42 lines
1.2 KiB
Diff
--- a/drivers/mtd/devices/Kconfig
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+++ b/drivers/mtd/devices/Kconfig
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@@ -102,6 +102,14 @@ config M25PXX_USE_FAST_READ
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help
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This option enables FAST_READ access supported by ST M25Pxx.
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+config M25PXX_PREFER_SMALL_SECTOR_ERASE
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+ bool "Prefer small sector erase"
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+ depends on MTD_M25P80
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+ default y
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+ help
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+ This option enables use of the small erase sectors if that is
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+ supported by the flash chip.
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+
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config MTD_SST25L
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tristate "Support SST25L (non JEDEC) SPI Flash chips"
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depends on SPI_MASTER
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--- a/drivers/mtd/devices/m25p80.c
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+++ b/drivers/mtd/devices/m25p80.c
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@@ -77,6 +77,12 @@
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#define FAST_READ_DUMMY_BYTE 0
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#endif
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+#ifdef CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE
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+#define PREFER_SMALL_SECTOR_ERASE 1
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+#else
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+#define PREFER_SMALL_SECTOR_ERASE 0
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+#endif
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+
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/****************************************************************************/
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struct m25p {
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@@ -902,7 +908,7 @@ static int __devinit m25p_probe(struct s
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flash->mtd.write = m25p80_write;
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/* prefer "small sector" erase if possible */
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- if (info->flags & SECT_4K) {
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+ if (PREFER_SMALL_SECTOR_ERASE && (info->flags & SECT_4K)) {
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flash->erase_opcode = OPCODE_BE_4K;
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flash->mtd.erasesize = 4096;
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} else if (info->flags & SECT_4K_PMC) {
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