4.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxx>
Fixes: d8e725dd8311 ("mtd: nand: automate NAND timings selection")
Reported-by: Alexander Dahl <ada@xxxxxxxxxxx>
Tested-by: Alexander Dahl <ada@xxxxxxxxxxx>
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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,
};