target/linux/generic/pending-3.18/044-backport-m25p80-jedec-probe.patch

   1 --- a/drivers/mtd/devices/m25p80.c
   2 +++ b/drivers/mtd/devices/m25p80.c
   3 @@ -310,11 +310,21 @@ static const struct spi_device_id m25p_i
   4  };
   5  MODULE_DEVICE_TABLE(spi, m25p_ids);
   6
   7 +static const struct of_device_id m25p_of_table[] = {
   8 +       /*
   9 +        * Generic compatibility for SPI NOR that can be identified by the
  10 +        * JEDEC READ ID opcode (0x9F). Use this, if possible.
  11 +        */
  12 +       { .compatible = "jedec,spi-nor" },
  13 +       {}
  14 +};
  15 +MODULE_DEVICE_TABLE(of, m25p_of_table);
  16
  17  static struct spi_driver m25p80_driver = {
  18         .driver = {
  19                 .name   = "m25p80",
  20                 .owner  = THIS_MODULE,
  21 +               .of_match_table = m25p_of_table,
  22         },
  23         .id_table       = m25p_ids,
  24         .probe  = m25p_probe,
  25 --- a/drivers/mtd/spi-nor/spi-nor.c
  26 +++ b/drivers/mtd/spi-nor/spi-nor.c
  27 @@ -934,8 +934,11 @@ int spi_nor_scan(struct spi_nor *nor, co
  28         if (ret)
  29                 return ret;
  30
  31 -       id = spi_nor_match_id(name);
  32 +       if (name)
  33 +               id = spi_nor_match_id(name);
  34         if (!id)
  35 +               id = nor->read_id(nor);
  36 +       if (IS_ERR_OR_NULL(id))
  37                 return -ENOENT;
  38
  39         info = (void *)id->driver_data;