target/linux/generic/backport-5.15/819-v6.6-0017-nvmem-core-Notify-when-a-new-layout-is-registered.patch

   1 From 0991afbe4b1805e7f0113ef10d7c5f0698a739e4 Mon Sep 17 00:00:00 2001
   2 From: Miquel Raynal <miquel.raynal@bootlin.com>
   3 Date: Tue, 8 Aug 2023 08:29:29 +0200
   4 Subject: [PATCH] nvmem: core: Notify when a new layout is registered
   5
   6 Tell listeners a new layout was introduced and is now available.
   7
   8 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
   9 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  10 ---
  11  drivers/nvmem/core.c           | 4 ++++
  12  include/linux/nvmem-consumer.h | 2 ++
  13  2 files changed, 6 insertions(+)
  14
  15 --- a/drivers/nvmem/core.c
  16 +++ b/drivers/nvmem/core.c
  17 @@ -772,12 +772,16 @@ int __nvmem_layout_register(struct nvmem
  18         list_add(&layout->node, &nvmem_layouts);
  19         spin_unlock(&nvmem_layout_lock);
  20
  21 +       blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_ADD, layout);
  22 +
  23         return 0;
  24  }
  25  EXPORT_SYMBOL_GPL(__nvmem_layout_register);
  26
  27  void nvmem_layout_unregister(struct nvmem_layout *layout)
  28  {
  29 +       blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_REMOVE, layout);
  30 +
  31         spin_lock(&nvmem_layout_lock);
  32         list_del(&layout->node);
  33         spin_unlock(&nvmem_layout_lock);
  34 --- a/include/linux/nvmem-consumer.h
  35 +++ b/include/linux/nvmem-consumer.h
  36 @@ -43,6 +43,8 @@ enum {
  37         NVMEM_REMOVE,
  38         NVMEM_CELL_ADD,
  39         NVMEM_CELL_REMOVE,
  40 +       NVMEM_LAYOUT_ADD,
  41 +       NVMEM_LAYOUT_REMOVE,
  42  };
  43
  44  #if IS_ENABLED(CONFIG_NVMEM)