From: Jagdish Gediya <jagdish.gediya@nxp.com>
Date: Thu, 23 Nov 2017 17:04:31 +0530
Subject: mtd: nand: ifc: update bufnum mask for ver >= 2.0.0

Git-commit: bccb06c353af3764ca86d9da47652458e6c2eb41
Patch-mainline: v4.16-rc1
References: fate#326530,fate#326531,fate#326535,fate#326538,fate#326539

Bufnum mask is used to calculate page position in the internal SRAM.

As IFC version 2.0.0 has 16KB of internal SRAM as compared to older
versions which had 8KB. Hence bufnum mask needs to be updated.

Signed-off-by: Jagdish Gediya <jagdish.gediya@nxp.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 drivers/mtd/nand/fsl_ifc_nand.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -907,6 +907,13 @@ static int fsl_ifc_chip_init(struct fsl_
 	if (ctrl->version == FSL_IFC_VERSION_1_1_0)
 		fsl_ifc_sram_init(priv);
 
+	/*
+	 * As IFC version 2.0.0 has 16KB of internal SRAM as compared to older
+	 * versions which had 8KB. Hence bufnum mask needs to be updated.
+	 */
+	if (ctrl->version >= FSL_IFC_VERSION_2_0_0)
+		priv->bufnum_mask = (priv->bufnum_mask * 2) + 1;
+
 	return 0;
 }