mtd: spinand: Enable QE on all dies

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The QUAD ENABLE (QE) bit is stored in a per-die configuration
register on some SPI-NAND devices. When a device contains multiple
dies, updating the QE bit only on the currently selected die can
leave the remaining dies operating in non-quad mode.
 
Iterate over all targets and update the QE setting on each die
during initialization to ensure consistent quad I/O operation
across the entire device.

Tested on ISSI IS38SMW04G8B.

Fixes: 7529df4652 ("mtd: nand: Add core infrastructure to support SPI NANDs")
Cc: stable@vger.kernel.org
Signed-off-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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Han Xu 2026-08-13 08:07:24 -05:00 • committed by Miquel Raynal

parent b5965c4221

commit 63d6cace2c

1 changed files with 20 additions and 2 deletions

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drivers/mtd/nand/spi/core.c

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