5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Linus Walleij linus.walleij@linaro.org
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 --- drivers/mtd/nand/raw/fsmc_nand.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/mtd/nand/raw/fsmc_nand.c +++ b/drivers/mtd/nand/raw/fsmc_nand.c @@ -861,10 +861,14 @@ static int fsmc_nand_probe_config_dt(str 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_get_property(np, "nand-skip-bbtscan", NULL))