diff options
| author | Han Xu <han.xu@nxp.com> | 2026-08-13 08:07:24 -0500 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2026-09-04 19:05:22 +0200 |
| commit | 63d6cace2c4a7f36c1cb44f1bb5e0f3ef19e5c7f (patch) | |
| tree | ddd65e76e137c4197805ebb31ffb328c7cf58034 /drivers/mtd/nand | |
| parent | b5965c4221165045e19736794ca5f48ae3d67142 (diff) | |
mtd: spinand: Enable QE on all dies
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: 7529df465248 ("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>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/spi/core.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 8bf9301f25e7..bea352dd82d7 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -281,8 +281,26 @@ static int spinand_init_cfg_cache(struct spinand_device *spinand) static int spinand_init_quad_enable(struct spinand_device *spinand, bool enable) { - return spinand_upd_cfg(spinand, CFG_QUAD_ENABLE, - enable ? CFG_QUAD_ENABLE : 0); + struct nand_device *nand = spinand_to_nand(spinand); + unsigned int target; + int ret; + + /* + * QE is a per-die setting on some devices. Program each target + * individually when enabling or disabling quad I/O mode. + */ + for (target = 0; target < nand->memorg.ntargets; target++) { + ret = spinand_select_target(spinand, target); + if (ret) + return ret; + + ret = spinand_upd_cfg(spinand, CFG_QUAD_ENABLE, + enable ? CFG_QUAD_ENABLE : 0); + if (ret) + return ret; + } + + return 0; } static int spinand_ecc_enable(struct spinand_device *spinand, |