| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.12 10/65] mtd: nand: Fix timing setup for NANDs that do not support SET FEATURES | Date | Mon, 14 Aug 2017 18:19:01 -0700 |
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4.12-stable review patch. If anyone has any objections, please let me know.
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From: Boris Brezillon <boris.brezillon@free-electrons.com>
commit a11bf5ed951f8900d244d09eb03a888b59c7fc82 upstream.
Some ONFI NANDs do not support the SET/GET FEATURES commands, which, according to the spec, is perfectly valid.
On these NANDs we can't set a specific timing mode using the "timing mode" feature, and we should assume the NAND does not require any setup to enter a specific timing mode.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Fixes: d8e725dd8311 ("mtd: nand: automate NAND timings selection") Reported-by: Alexander Dahl <ada@thorsis.com> Tested-by: Alexander Dahl <ada@thorsis.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/mtd/nand/nand_base.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1102,7 +1102,9 @@ static int nand_setup_data_interface(str * Ensure the timing mode has been changed on the chip side * before changing timings on the controller side. */ - if (chip->onfi_version) { + if (chip->onfi_version && + (le16_to_cpu(chip->onfi_params.opt_cmd) & + ONFI_OPT_CMD_SET_GET_FEATURES)) { u8 tmode_param[ONFI_SUBFEATURE_PARAM_LEN] = { chip->onfi_timing_mode_default, };
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