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mtd: rawnand: fsmc: Default to autodetect buswidth

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commit b8df622cf7f6808c85764e681847150ed6d85f3d upstream.

If you don't specify buswidth 2 (16 bits) in the device
tree, FSMC doesn't even probe anymore:

fsmc-nand 10100000.flash: FSMC device partno 090,
  manufacturer 80, revision 00, config 00
nand: device found, Manufacturer ID: 0x20, Chip ID: 0xb1
nand: ST Micro 10100000.flash
nand: bus width 8 instead of 16 bits
nand: No NAND device found
fsmc-nand 10100000.flash: probe with driver fsmc-nand failed
  with error -22

With this patch to use autodetection unless buswidth is
specified, the device is properly detected again:

fsmc-nand 10100000.flash: FSMC device partno 090,
  manufacturer 80, revision 00, config 00
nand: device found, Manufacturer ID: 0x20, Chip ID: 0xb1
nand: ST Micro NAND 128MiB 1,8V 16-bit
nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
fsmc-nand 10100000.flash: Using 1-bit HW ECC scheme
Scanning device for bad blocks

I don't know where or how this happened, I think some change
in the nand core.

Cc: stable@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij
2025-09-16 18:07:37 +02:00
committed by Greg Kroah-Hartman
parent 151bd88859
commit 6a5b401c74
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/mtd/nand/raw/fsmc_nand.c
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@@ -876,10 +876,14 @@ static int fsmc_nand_probe_config_dt(struct platform_device *pdev,
if (!of_property_read_u32(np, "bank-width", &val)) {
if (val == 2) {
nand->options |= NAND_BUSWIDTH_16;
} else if (val != 1) {
} else if (val == 1) {
nand->options |= NAND_BUSWIDTH_AUTO;
} else {
dev_err(&pdev->dev, "invalid bank-width %u\n", val);
return -EINVAL;
}
} else {
nand->options |= NAND_BUSWIDTH_AUTO;
}
if (of_property_read_bool(np, "nand-skip-bbtscan"))