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mtd: spinor: Add more mtd information 

1.erasesize_shift, erasesize_mask
2.it's useful for mtd_blk.c

Change-Id: I0bd184fc86637849fbd079f9f539387465a07b8f
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
This commit is contained in:
Jon Lin 2020-12-13 17:44:56 +08:00
parent d06e16f8b1
commit 8ff9c29cc8
1 changed files with 5 additions and 0 deletions
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5
drivers/mtd/spi/spi-nor-core.c
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@ -2288,6 +2288,11 @@ int spi_nor_scan(struct spi_nor *nor)
mtd->size = params.size;
mtd->_erase = spi_nor_erase;
mtd->_read = spi_nor_read;
if (is_power_of_2(mtd->erasesize))
mtd->erasesize_shift = ffs(mtd->erasesize) - 1;
else
mtd->erasesize_shift = 0;
mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1;
#if defined(CONFIG_SPI_FLASH_STMICRO) || defined(CONFIG_SPI_FLASH_SST)
/* NOR protection support for STmicro/Micron chips and similar */