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--- a/drivers/mtd/spi-nor/Kconfig
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+++ b/drivers/mtd/spi-nor/Kconfig
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@@ -7,6 +7,20 @@ menuconfig MTD_SPI_NOR
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if MTD_SPI_NOR
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+config MTD_SPI_NOR_USE_4K_SECTORS
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+ bool "Use small 4096 B erase sectors"
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+ default y
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+ help
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+ Many flash memories support erasing small (4096 B) sectors. Depending
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+ on the usage this feature may provide performance gain in comparison
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+ to erasing whole blocks (32/64 KiB).
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+ Changing small part of flash content is usually faster with small
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+ sectors. On the other hand erasing should be faster when using 64 KiB
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+ block instead of 16 × 4 KiB sectors.
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+
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+ Please note that some tools/drivers/filesystems may not work with
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+ 4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
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+
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config SPI_FSL_QUADSPI
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tristate "Freescale Quad SPI controller"
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depends on ARCH_MXC
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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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@@ -987,6 +987,7 @@ int spi_nor_scan(struct spi_nor *nor, co
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nor->wait_till_ready == spi_nor_wait_till_ready)
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nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
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+#ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
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/* prefer "small sector" erase if possible */
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if (info->flags & SECT_4K) {
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nor->erase_opcode = SPINOR_OP_BE_4K;
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@@ -994,7 +995,9 @@ int spi_nor_scan(struct spi_nor *nor, co
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} else if (info->flags & SECT_4K_PMC) {
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nor->erase_opcode = SPINOR_OP_BE_4K_PMC;
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mtd->erasesize = 4096;
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- } else {
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+ } else
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+#endif
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+ {
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nor->erase_opcode = SPINOR_OP_SE;
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mtd->erasesize = info->sector_size;
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}
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