[PATCH v9 4/7] nvmem: core: Notify when a new layout is registered

From: Miquel Raynal
Date: Tue Aug 08 2023 - 14:08:33 EST


Tell listeners a new layout was introduced and is now available.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
drivers/nvmem/core.c | 4 ++++
include/linux/nvmem-consumer.h | 2 ++
2 files changed, 6 insertions(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 257328887263..4fb6d4d7fe40 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -772,12 +772,16 @@ int __nvmem_layout_register(struct nvmem_layout *layout, struct module *owner)
list_add(&layout->node, &nvmem_layouts);
spin_unlock(&nvmem_layout_lock);

+ blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_ADD, layout);
+
return 0;
}
EXPORT_SYMBOL_GPL(__nvmem_layout_register);

void nvmem_layout_unregister(struct nvmem_layout *layout)
{
+ blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_REMOVE, layout);
+
spin_lock(&nvmem_layout_lock);
list_del(&layout->node);
spin_unlock(&nvmem_layout_lock);
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 27373024856d..4523e4e83319 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -43,6 +43,8 @@ enum {
NVMEM_REMOVE,
NVMEM_CELL_ADD,
NVMEM_CELL_REMOVE,
+ NVMEM_LAYOUT_ADD,
+ NVMEM_LAYOUT_REMOVE,
};

#if IS_ENABLED(CONFIG_NVMEM)
--
2.34.1