mtd: nand: mxs_nand: add use_minimum_ecc to struct

Add use_minimum_ecc as struct mxs_nand_info field in preparation
for device tree support.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>

diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c
index bb40237..3c9ee07 100644 (file)
--- a/drivers/mtd/nand/mxs_nand.c
+++ b/drivers/mtd/nand/mxs_nand.c
@@ -71,6 +71,8 @@ struct bch_geometry {
 
 struct mxs_nand_info {
        struct nand_chip chip;
+       unsigned int    max_ecc_strength_supported;
+       bool            use_minimum_ecc;
        int             cur_chip;
 
        uint32_t        cmd_queue_len;
@@ -215,19 +217,11 @@ static inline int mxs_nand_calc_mark_offset(struct bch_geometry *geo,
        return 0;
 }
 
-static inline unsigned int mxs_nand_max_ecc_strength_supported(void)
-{
-       /* Refer to Chapter 17 for i.MX6DQ, Chapter 18 for i.MX6SX */
-       if (is_mx6sx() || is_mx7())
-               return 62;
-       else
-               return 40;
-}
-
 static inline int mxs_nand_calc_ecc_layout_by_info(struct bch_geometry *geo,
                                                   struct mtd_info *mtd)
 {
        struct nand_chip *chip = mtd_to_nand(mtd);
+       struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
 
        if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
                return -ENOTSUPP;
@@ -250,7 +244,7 @@ static inline int mxs_nand_calc_ecc_layout_by_info(struct bch_geometry *geo,
        if (geo->ecc_chunk_size < mtd->oobsize)
                return -EINVAL;
 
-       if (geo->ecc_strength > mxs_nand_max_ecc_strength_supported())
+       if (geo->ecc_strength > nand_info->max_ecc_strength_supported)
                return -EINVAL;
 
        geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunk_size;
@@ -261,6 +255,9 @@ static inline int mxs_nand_calc_ecc_layout_by_info(struct bch_geometry *geo,
 static inline int mxs_nand_calc_ecc_layout(struct bch_geometry *geo,
                                           struct mtd_info *mtd)
 {
+       struct nand_chip *chip = mtd_to_nand(mtd);
+       struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
+
        /* The default for the length of Galois Field. */
        geo->gf_len = 13;
 
@@ -292,7 +289,7 @@ static inline int mxs_nand_calc_ecc_layout(struct bch_geometry *geo,
                        / (geo->gf_len * geo->ecc_chunk_count);
 
        geo->ecc_strength = min(round_down(geo->ecc_strength, 2),
-                               mxs_nand_max_ecc_strength_supported());
+                               nand_info->max_ecc_strength_supported);
 
        return 0;
 }
@@ -1042,9 +1039,8 @@ int mxs_nand_setup_ecc(struct mtd_info *mtd)
        uint32_t tmp;
        int ret = -ENOTSUPP;
 
-#ifdef CONFIG_NAND_MXS_USE_MINIMUM_ECC
-       ret = mxs_nand_calc_ecc_layout_by_info(geo, mtd);
-#endif
+       if (nand_info->use_minimum_ecc)
+               ret = mxs_nand_calc_ecc_layout_by_info(geo, mtd);
 
        if (ret == -ENOTSUPP)
                ret = mxs_nand_calc_ecc_layout(geo, mtd);
@@ -1322,6 +1318,16 @@ void board_nand_init(void)
        nand_info->gpmi_regs = (struct mxs_gpmi_regs *)MXS_GPMI_BASE;
        nand_info->bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
 
+       /* Refer to Chapter 17 for i.MX6DQ, Chapter 18 for i.MX6SX */
+       if (is_mx6sx() || is_mx7())
+               nand_info->max_ecc_strength_supported = 62;
+       else
+               nand_info->max_ecc_strength_supported = 40;
+
+#ifdef CONFIG_NAND_MXS_USE_MINIMUM_ECC
+       nand_info->use_minimum_ecc = true;
+#endif
+
        if (mxs_nand_init(nand_info) < 0)
                goto err;