target/linux/lantiq/patches-5.4/0019-MTD-nand-support-new-dt-bindings.patch

   1 The nand-ecc-mode DT binding is depracated but the new bindings are
   2 not supported by kernel 5.4. Based on a fix in the kernel to not
   3 overwrite the DT ECC settings, the DT needs to be updated and moves
   4 to the new DT binding.
   5 Since the DT is shared between kernel 5.4 and 5.10, this patch is
   6 an interim solution to allow to use the new DT bindings in kernel 5.4.
   7 It should be removed when moving away from kernel 5.4.
   8 --- a/drivers/mtd/nand/raw/nand_base.c
   9 +++ b/drivers/mtd/nand/raw/nand_base.c
  10 @@ -4851,10 +4851,17 @@ static int of_get_nand_ecc_mode(struct d
  11  {
  12         const char *pm;
  13         int err, i;
  14 +       struct device_node *eng_np;
  15
  16         err = of_property_read_string(np, "nand-ecc-mode", &pm);
  17 -       if (err < 0)
  18 +       if (err < 0) {
  19 +               if (of_property_read_bool(np, "nand-use-soft-ecc-engine"))
  20 +                       return NAND_ECC_SOFT;
  21 +               eng_np = of_parse_phandle(np, "nand-ecc-engine", 0);
  22 +               if (eng_np && (eng_np == np))
  23 +                       return NAND_ECC_ON_DIE;
  24                 return err;
  25 +       }
  26
  27         for (i = 0; i < ARRAY_SIZE(nand_ecc_modes); i++)
  28                 if (!strcasecmp(pm, nand_ecc_modes[i]))