[PATCH 6/6] mtd: nand: macronix: Unflag the support of changing timings for MX30LF2G18AC

[Miquel Raynal]

From: Miquel Raynal <miquel.raynal at free-electrons.com>

The MX30LF2G18AC chip declares in its parameter page supporting
SET/GET_FEATURES but when it comes to timings, experience shows that it
is not the case.

Unflag this feature for this particular chip in the nand_parameters
structure to avoid unnecessary errors and downturns.

Signed-off-by: Miquel Raynal <miquel.raynal at free-electrons.com>
---
 drivers/mtd/nand/nand_macronix.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/mtd/nand/nand_macronix.c b/drivers/mtd/nand/nand_macronix.c
index d290ff2a6d2f..c58567834595 100644
--- a/drivers/mtd/nand/nand_macronix.c
+++ b/drivers/mtd/nand/nand_macronix.c
@@ -19,9 +19,21 @@
 
 static int macronix_nand_init(struct nand_chip *chip)
 {
+	const char model[20] = "MX30LF2G18AC";
+
 	if (nand_is_slc(chip))
 		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
 
+	/*
+	 * MX30LF2G18AC chip does not support using SET/GET_FEATURES to change
+	 * the timings unlike what is declared in the parameter page. Unflag
+	 * this feature to avoid unnecessary downturns.
+	 */
+	if (chip->parameters.support_setting_features &&
+	    !strncmp(model, chip->parameters.model, ARRAY_SIZE(model)))
+		bitmap_clear(chip->parameters.feature_list,
+			     ONFI_FEATURE_ADDR_TIMING_MODE, 1);
+
 	return 0;
 }
 
-- 
2.14.1