[PATCH] mtd: mxc_nand: compress ID info for send_read_id_v3

Schneider, Roman schneider at at.festo.com
Wed Dec 12 13:49:28 EST 2012

       NFC v3 (e.g. mx53) does also require to compress the id in case of 16Bit busw.
        drivers/mtd/nand/mxc_nand.c |   11 +++++++++++
        1 files changed, 11 insertions(+), 0 deletions(-)
       diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
       index 72e31d8..7758897 100644
       --- a/drivers/mtd/nand/mxc_nand.c
       +++ b/drivers/mtd/nand/mxc_nand.c
       @@ -535,12 +535,23 @@ 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. */

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