target/linux/generic/backport-5.4/406-v5.13-0001-mtd-core-add-nvmem-cells-compatible-to-parse-mtd-as-.patch

   1 From 658c4448bbbf02a143abf1b89d09a3337ebd3ba6 Mon Sep 17 00:00:00 2001
   2 From: Ansuel Smith <ansuelsmth@gmail.com>
   3 Date: Fri, 12 Mar 2021 07:28:19 +0100
   4 Subject: [PATCH] mtd: core: add nvmem-cells compatible to parse mtd as nvmem
   5  cells
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Partitions that contains the nvmem-cells compatible will register
  11 their direct subonodes as nvmem cells and the node will be treated as a
  12 nvmem provider.
  13
  14 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
  15 Tested-by: Rafał Miłecki <rafal@milecki.pl>
  16 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  17 Link: https://lore.kernel.org/linux-mtd/20210312062830.20548-1-ansuelsmth@gmail.com
  18 ---
  19  drivers/mtd/mtdcore.c | 3 ++-
  20  1 file changed, 2 insertions(+), 1 deletion(-)
  21
  22 --- a/drivers/mtd/mtdcore.c
  23 +++ b/drivers/mtd/mtdcore.c
  24 @@ -559,6 +559,7 @@ static int mtd_nvmem_reg_read(void *priv
  25
  26  static int mtd_nvmem_add(struct mtd_info *mtd)
  27  {
  28 +       struct device_node *node = mtd_get_of_node(mtd);
  29         struct nvmem_config config = {};
  30
  31         config.id = -1;
  32 @@ -571,7 +572,7 @@ static int mtd_nvmem_add(struct mtd_info
  33         config.stride = 1;
  34         config.read_only = true;
  35         config.root_only = true;
  36 -       config.no_of_node = true;
  37 +       config.no_of_node = !of_device_is_compatible(node, "nvmem-cells");
  38         config.priv = mtd;
  39
  40         mtd->nvmem = nvmem_register(&config);