mtd: pxa3xx_nand: fix nand detection issue

When keep_config is set, the detection would goes different routine.
That the driver would read out the setting which is set previously
by bootloader. While most bootloader keep the irq mask as off, and
current driver need all irq default open, keep_config behavior would
lead to no irq at all.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index c7da3c8be9d67ffbb84e53837369e4fb701bbe6a..9fde1399af9169616bff0d5c1c9564b6573203b4 100644 (file)
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -813,7 +813,7 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
        info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512;
        /* set info fields needed to read id */
        info->read_id_bytes = (info->page_size == 2048) ? 4 : 2;
-       info->reg_ndcr = ndcr;
+       info->reg_ndcr = ndcr & ~NDCR_INT_MASK;
        info->cmdset = &default_cmdset;
 
        info->ndtr0cs0 = nand_readl(info, NDTR0CS0);
@@ -882,7 +882,7 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
        struct pxa3xx_nand_info *info = mtd->priv;
        struct platform_device *pdev = info->pdev;
        struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data;
-       struct nand_flash_dev pxa3xx_flash_ids[2] = { {NULL,}, {NULL,} };
+       struct nand_flash_dev pxa3xx_flash_ids[2], *def = NULL;
        const struct pxa3xx_nand_flash *f = NULL;
        struct nand_chip *chip = mtd->priv;
        uint32_t id = -1;
@@ -942,8 +942,10 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
        pxa3xx_flash_ids[0].erasesize = f->page_size * f->page_per_block;
        if (f->flash_width == 16)
                pxa3xx_flash_ids[0].options = NAND_BUSWIDTH_16;
+       pxa3xx_flash_ids[1].name = NULL;
+       def = pxa3xx_flash_ids;
 KEEP_CONFIG:
-       if (nand_scan_ident(mtd, 1, pxa3xx_flash_ids))
+       if (nand_scan_ident(mtd, 1, def))
                return -ENODEV;
        /* calculate addressing information */
        info->col_addr_cycles = (mtd->writesize >= 2048) ? 2 : 1;
@@ -954,9 +956,9 @@ KEEP_CONFIG:
                info->row_addr_cycles = 2;
        mtd->name = mtd_names[0];
        chip->ecc.mode = NAND_ECC_HW;
-       chip->ecc.size = f->page_size;
+       chip->ecc.size = info->page_size;
 
-       chip->options = (f->flash_width == 16) ? NAND_BUSWIDTH_16 : 0;
+       chip->options = (info->reg_ndcr & NDCR_DWIDTH_M) ? NAND_BUSWIDTH_16 : 0;
        chip->options |= NAND_NO_AUTOINCR;
        chip->options |= NAND_NO_READRDY;