nvmem: core: Notify when a new layout is registered

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

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230823132744.350618-23-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 12d05aea0b419bf34ff7e3f99beb5eab775da3df..eaf6a3fe8ca6d42ccb6971770e221af9497242e6 100644 (file)
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -771,12 +771,16 @@ 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 27373024856dc74b3a2a6838e0a0d89861839548..4523e4e8331970d3f6e48cb408f825329f407d8f 100644 (file)
--- 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)