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diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index f561c68..8e636df 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3624,8 +3624,13 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
chip->ecc_strength_ds = NAND_ECC_STRENGTH(type);
chip->ecc_step_ds = NAND_ECC_STEP(type);
- mode = type->onfi_timing_mode_default;
- chip->sdr_timings = onfi_async_timing_mode_to_sdr_timings(mode);
+ if (type->custom_sdr_timing) {
+ chip->sdr_timings = type->custom_sdr_timing;
+ } else {
+ mode = type->onfi_timing_mode_default;
+ chip->sdr_timings =
+ onfi_async_timing_mode_to_sdr_timings(mode);
+ }
*busw = type->options & NAND_BUSWIDTH_16;
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 2eb92a3..7d9e599 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -863,6 +863,7 @@ struct nand_flash_dev {
uint16_t step_ds;
} ecc;
int onfi_timing_mode_default;
+ const struct nand_sdr_timings *custom_sdr_timing;
};
/**
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