[MTD] [NAND] corrected MPC8313 NAND fixes

Fix a race condition in fsl_elbc_run_command
Fix incorrect usage of clearbits32 that bashed option register
Remove work around for bashed register

Signed-off-by: Mike Hench <mhench@elutions.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index cb12b67..919c192 100644 (file)
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -184,11 +184,11 @@ static int fsl_elbc_run_command(struct mtd_info *mtd)
                 in_be32(&lbc->fbar), in_be32(&lbc->fpar),
                 in_be32(&lbc->fbcr), priv->bank);
 
+       ctrl->irq_status = 0;
        /* execute special operation */
        out_be32(&lbc->lsor, priv->bank);
 
        /* wait for FCM complete flag or timeout */
-       ctrl->irq_status = 0;
        wait_event_timeout(ctrl->irq_wait, ctrl->irq_status,
                           FCM_TIMEOUT_MSECS * HZ/1000);
        ctrl->status = ctrl->irq_status;
@@ -667,7 +667,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
        /* adjust Option Register and ECC to match Flash page size */
        if (mtd->writesize == 512) {
                priv->page_size = 0;
-               clrbits32(&lbc->bank[priv->bank].or, ~OR_FCM_PGS);
+               clrbits32(&lbc->bank[priv->bank].or, OR_FCM_PGS);
        } else if (mtd->writesize == 2048) {
                priv->page_size = 1;
                setbits32(&lbc->bank[priv->bank].or, OR_FCM_PGS);
@@ -688,11 +688,6 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
                return -1;
        }
 
-       /* The default u-boot configuration on MPC8313ERDB causes errors;
-        * more delay is needed.  This should be safe for other boards
-        * as well.
-        */
-       setbits32(&lbc->bank[priv->bank].or, 0x70);
        return 0;
 }