mtd: nand: ifc: update bufnum mask for ver >= 2.0.0

BugLink: http://bugs.launchpad.net/bugs/1756978
[ Upstream commit bccb06c353af3764ca86d9da47652458e6c2eb41 ]

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: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 9e03bac7f34c08e88fcb58bd3c92ac67bd1075eb..bbdd68a54d68dd4d1088bf2126160fd47bbd1ae4 100644 (file)
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -916,6 +916,13 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
        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;
 }