target/linux/sunxi/patches-4.1/124-mtd-nand-sunxi-fallback-to-chip-config.patch

   1 From de994d9c849ca0ca020fccfa1916afcde7f313f2 Mon Sep 17 00:00:00 2001
   2 From: Boris BREZILLON <boris.brezillon@free-electrons.com>
   3 Date: Sun, 24 Aug 2014 10:40:44 +0200
   4 Subject: [PATCH] mtd: nand: sunxi: Fallback to chip config when partition
   5  config is not available
   6
   7 Fallback to chip config for partitions where ecc/rnd config are not
   8 specified in the device tree.
   9
  10 Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
  11 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  12 ---
  13  drivers/mtd/nand/sunxi_nand.c | 27 ++++++++++++++++++---------
  14  1 file changed, 18 insertions(+), 9 deletions(-)
  15
  16 diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
  17 index 2f6ab39..74f2caf 100644
  18 --- a/drivers/mtd/nand/sunxi_nand.c
  19 +++ b/drivers/mtd/nand/sunxi_nand.c
  20 @@ -1711,28 +1711,37 @@ static void sunxi_nand_part_release(struct nand_part *part)
  21  struct nand_part *sunxi_ofnandpart_parse(void *priv, struct mtd_info *master,
  22                                          struct device_node *pp)
  23  {
  24 +       struct nand_chip *chip = master->priv;
  25         struct sunxi_nand_part *part;
  26         int ret;
  27
  28         part = kzalloc(sizeof(*part), GFP_KERNEL);
  29         part->part.release = sunxi_nand_part_release;
  30
  31 -       ret = sunxi_nand_ecc_init(master, &part->ecc, pp);
  32 -       if (ret)
  33 -               goto err;
  34 +       if (of_find_property(pp, "nand-ecc-mode", NULL)) {
  35 +               ret = sunxi_nand_ecc_init(master, &part->ecc, pp);
  36 +               if (ret)
  37 +                       goto err;
  38
  39 -       ret = sunxi_nand_rnd_init(master, &part->rnd, &part->ecc, pp);
  40 -       if (ret) {
  41 -               sunxi_nand_ecc_cleanup(&part->ecc);
  42 -               goto err;
  43 +               part->part.ecc = &part->ecc;
  44         }
  45
  46 -       part->part.ecc = &part->ecc;
  47 -       part->part.rnd = &part->rnd;
  48 +       if (of_find_property(pp, "nand-rnd-mode", NULL)) {
  49 +               ret = sunxi_nand_rnd_init(master, &part->rnd,
  50 +                               part->part.ecc ? part->part.ecc : &chip->ecc,
  51 +                               pp);
  52 +               if (ret)
  53 +                       goto err;
  54 +
  55 +               part->part.rnd = &part->rnd;
  56 +       }
  57
  58         return &part->part;
  59
  60  err:
  61 +       if (part->part.ecc)
  62 +               sunxi_nand_ecc_cleanup(part->part.ecc);
  63 +
  64         kfree(part);
  65         return ERR_PTR(ret);
  66  }