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mtd: spi-nor: Fix whole chip erasing for stacked chips.

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Currently it is possible to disable chip erase for spi-nor driver.
Some modern stacked (multi die) flash chips do not support chip
erase opcode at all but spi-nor framework needs to cope with them too.
This commit extends existing functionality to allow disable
chip erase for a single flash chip.

Signed-off-by: Marcin Krzeminski <mar.krzeminski@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
This commit is contained in:
mar.krzeminski 2017-01-06 18:19:00 +01:00 committed by Cyrille Pitchen
parent ca1fa1a8a6
commit 2f5ad7f0f3
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/spi-nor/spi-nor.c
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@ -85,6 +85,7 @@ struct flash_info {
* Use dedicated 4byte address op codes
* to support memory size above 128Mib.
*/
#define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */
};
#define JEDEC_MFR(info) ((info)->id[0])
@ -1631,6 +1632,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
nor->flags |= SNOR_F_USE_FSR;
if (info->flags & SPI_NOR_HAS_TB)
nor->flags |= SNOR_F_HAS_SR_TB;
if (info->flags & NO_CHIP_ERASE)
nor->flags |= SNOR_F_NO_OP_CHIP_ERASE;
#ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
/* prefer "small sector" erase if possible */