mtd: mxc_nand: compress ID info for send_read_id_v3

Also compress the id in case of a v3 NAND flash controller (i.mx51, i.mx53)
and 16Bit buswidth.

Signed-off-by: Roman Schneider <schneider@at.festo.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 45204e41a028..20e1241bd099 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -530,12 +530,23 @@ static void send_page_v1(struct mtd_info *mtd, unsigned int ops)
 
 static void send_read_id_v3(struct mxc_nand_host *host)
 {
+        struct nand_chip *this = &host->nand;
+
         /* Read ID into main buffer */
         writel(NFC_ID, NFC_V3_LAUNCH);
 
         wait_op_done(host, true);
 
         memcpy32_fromio(host->data_buf, host->main_area0, 16);
+
+        if (this->options & NAND_BUSWIDTH_16) {
+                /* compress the ID info */
+                host->data_buf[1] = host->data_buf[2];
+                host->data_buf[2] = host->data_buf[4];
+                host->data_buf[3] = host->data_buf[6];
+                host->data_buf[4] = host->data_buf[8];
+                host->data_buf[5] = host->data_buf[10];
+        }
 }
 
 /* Request the NANDFC to perform a read of the NAND device ID. */