[PATCH v5 27/28] mtd: rawnand: Get rid of the default ONFI timing mode

[Miquel Raynal <miquel.raynal@bootlin.com>]

The ->choose_data_interface() hook is here for manufacturer drivers to
provide a better timing interface than the default one, this field is
not needed anymore.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/nand_base.c | 19 +++++--------------
 include/linux/mtd/rawnand.h      |  9 ---------
 2 files changed, 5 insertions(+), 23 deletions(-)

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index f14d297c50f4..2547136a9cd7 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -1010,17 +1010,15 @@ static int nand_setup_data_interface(struct nand_chip *chip, int chipnr)
  * @iface: the data interface (can eventually be updated)
  * @spec_timings: specific timings, when not fitting the ONFI specification
  *
- * If specific timings are provided, use them. Otherwise, try to retrieve
- * supported timing modes from ONFI information. Finally, if the NAND chip does
- * not follow the ONFI specification, rely on the ->default_timing_mode
- * specified in the nand_ids table.
+ * If specific timings are provided, use them. Otherwise, retrieve supported
+ * timing modes from ONFI information.
  */
 int nand_choose_best_sdr_timings(struct nand_chip *chip,
 				 struct nand_data_interface *iface,
 				 struct nand_sdr_timings *spec_timings)
 {
 	const struct nand_controller_ops *ops = chip->controller->ops;
-	int best_mode = 0, onfi_modes, mode, ret;
+	int best_mode = 0, mode, ret;
 
 	iface->type = NAND_SDR_IFACE;
 
@@ -1037,13 +1035,8 @@ int nand_choose_best_sdr_timings(struct nand_chip *chip,
 
 		/* Fallback to slower modes */
 		best_mode = iface->timings.mode;
-	} else {
-		if (chip->parameters.onfi) {
-			onfi_modes = chip->parameters.onfi->async_timing_mode;
-			best_mode = fls(onfi_modes) - 1;
-		} else {
-			best_mode = chip->onfi_timing_mode_default;
-		}
+	} else if (chip->parameters.onfi) {
+		best_mode = fls(chip->parameters.onfi->async_timing_mode) - 1;
 	}
 
 	for (mode = best_mode; mode >= 0; mode--) {
@@ -4822,8 +4815,6 @@ static bool find_full_id_nand(struct nand_chip *chip,
 		chip->options |= type->options;
 		chip->base.eccreq.strength = NAND_ECC_STRENGTH(type);
 		chip->base.eccreq.step_size = NAND_ECC_STEP(type);
-		chip->onfi_timing_mode_default =
-					type->onfi_timing_mode_default;
 
 		chip->parameters.model = kstrdup(type->name, GFP_KERNEL);
 		if (!chip->parameters.model)
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 5bd79e853140..00557e553827 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1070,9 +1070,6 @@ struct nand_manufacturer {
  * @options: Various chip options. They can partly be set to inform nand_scan
  *           about special functionality. See the defines for further
  *           explanation.
- * @onfi_timing_mode_default: Default ONFI timing mode. This field is set to the
- *			      actually used ONFI mode if the chip is ONFI
- *			      compliant or deduced from the datasheet otherwise
  * @data_interface: NAND interface timing information
  * @bbt_erase_shift: Number of address bits in a bbt entry
  * @bbt_options: Bad block table specific options. All options used here must
@@ -1120,7 +1117,6 @@ struct nand_chip {
 	unsigned int options;
 
 	/* Data interface */
-	int onfi_timing_mode_default;
 	struct nand_data_interface data_interface;
 
 	/* Bad block information */
@@ -1271,10 +1267,6 @@ nand_get_sdr_timings(struct nand_chip *chip)
  *               @ecc_step_ds in nand_chip{}, also from the datasheet.
  *               For example, the "4bit ECC for each 512Byte" can be set with
  *               NAND_ECC_INFO(4, 512).
- * @onfi_timing_mode_default: the default ONFI timing mode entered after a NAND
- *			      reset. Should be deduced from timings described
- *			      in the datasheet.
- *
  */
 struct nand_flash_dev {
 	char *name;
@@ -1295,7 +1287,6 @@ struct nand_flash_dev {
 		uint16_t strength_ds;
 		uint16_t step_ds;
 	} ecc;
-	int onfi_timing_mode_default;
 };
 
 int nand_create_bbt(struct nand_chip *chip);
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/