mtd: rawnand: timings: Provide onfi_fill_data_interface() with a data interface

Right now the core uses onfi_fill_data_interface() to initialize the
nand_data_interface object embedded in nand_chip, but we are about to
allocate this object dynamically and let manufacturer drivers provide
their own interface config. Let's patch the onfi_fill_data_interface()
so it can initialize an interface config that's not the one
currently attached to the nand_chip.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://lore.kernel.org/linux-mtd/20200529111322.7184-14-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/internals.h

@@ -85,6 +85,7 @@ int nand_markbad_bbm(struct nand_chip *chip, loff_t ofs);
 int nand_erase_nand(struct nand_chip *chip, struct erase_info *instr,
 		    int allowbbt);
 int onfi_fill_data_interface(struct nand_chip *chip,
+			     struct nand_data_interface *iface,
 			     enum nand_data_interface_type type,
 			     int timing_mode);
 int nand_get_features(struct nand_chip *chip, int addr, u8 *subfeature_param);

drivers/mtd/nand/raw/nand_base.c

@@ -927,7 +927,7 @@ static int nand_reset_data_interface(struct nand_chip *chip, int chipnr)
 	 * timings to timing mode 0.
 	 */
 
-	onfi_fill_data_interface(chip, NAND_SDR_IFACE, 0);
+	onfi_fill_data_interface(chip, &chip->data_interface, NAND_SDR_IFACE, 0);
 	ret = chip->controller->ops->setup_data_interface(chip, chipnr,
 							&chip->data_interface);
 	if (ret)
@@ -1040,7 +1040,8 @@ static int nand_choose_data_interface(struct nand_chip *chip)
 	}
 
 	for (mode = fls(modes) - 1; mode >= 0; mode--) {
-		ret = onfi_fill_data_interface(chip, NAND_SDR_IFACE, mode);
+		ret = onfi_fill_data_interface(chip, &chip->data_interface,
+					       NAND_SDR_IFACE, mode);
 		if (ret)
 			continue;
 
@@ -5182,7 +5183,7 @@ static int nand_scan_ident(struct nand_chip *chip, unsigned int maxchips,
 	mutex_init(&chip->lock);
 
 	/* Enforce the right timings for reset/detection */
-	onfi_fill_data_interface(chip, NAND_SDR_IFACE, 0);
+	onfi_fill_data_interface(chip, &chip->data_interface, NAND_SDR_IFACE, 0);
 
 	ret = nand_dt_init(chip);
 	if (ret)

drivers/mtd/nand/raw/nand_timings.c

@@ -276,14 +276,15 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
 /**
  * onfi_fill_data_interface - Initialize a data interface from a given ONFI mode
  * @chip: The NAND chip
+ * @iface: The data interface to fill
  * @type: The data interface type
  * @timing_mode: The ONFI timing mode
  */
 int onfi_fill_data_interface(struct nand_chip *chip,
+			     struct nand_data_interface *iface,
 			     enum nand_data_interface_type type,
 			     int timing_mode)
 {
-	struct nand_data_interface *iface = &chip->data_interface;
 	struct onfi_params *onfi = chip->parameters.onfi;
 
 	if (type != NAND_SDR_IFACE)