[PATCH 26/44] nvmem: add devices to new nvmem class

[Ahmad Fatoum <a.fatoum@barebox.org>]

We already link all nvmem devices into a linked list, but we don't
export it for outside iteration.

Turn it into a class before exporting it.

No functional change.

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 drivers/nvmem/core.c           | 10 ++++------
 include/linux/nvmem-consumer.h |  5 ++++-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 68cb27093227..253c00575d88 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -16,7 +16,6 @@
 struct nvmem_device {
 	const char		*name;
 	struct device		dev;
-	struct list_head	node;
 	int			stride;
 	int			word_size;
 	int			ncells;
@@ -46,15 +45,14 @@ struct nvmem_cell {
 };
 
 static LIST_HEAD(nvmem_cells);
-static LIST_HEAD(nvmem_devs);
+DEFINE_DEV_CLASS(nvmem_class, "nvmem");
 
 void nvmem_devices_print(void)
 {
 	struct nvmem_device *dev;
 
-	list_for_each_entry(dev, &nvmem_devs, node) {
+	class_for_each_container_of_device(&nvmem_class, dev, dev)
 		printf("%s\n", dev_name(&dev->dev));
-	}
 }
 
 static ssize_t nvmem_cdev_read(struct cdev *cdev, void *buf, size_t count,
@@ -154,7 +152,7 @@ static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
 	if (!nvmem_np)
 		return NULL;
 
-	list_for_each_entry(dev, &nvmem_devs, node)
+	class_for_each_container_of_device(&nvmem_class, dev, dev)
 		if (dev->dev.of_node == nvmem_np)
 			return dev;
 
@@ -266,7 +264,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 		}
 	}
 
-	list_add_tail(&nvmem->node, &nvmem_devs);
+	class_add_device(&nvmem_class, &nvmem->dev);
 
 	return nvmem;
 }
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 397c4c29dafd..c711b63aeeb0 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -12,7 +12,8 @@
 #ifndef _LINUX_NVMEM_CONSUMER_H
 #define _LINUX_NVMEM_CONSUMER_H
 
-struct device;
+#include <device.h>
+
 struct device_node;
 /* consumer cookie */
 struct nvmem_cell;
@@ -26,6 +27,8 @@ struct nvmem_cell_info {
 	unsigned int		nbits;
 };
 
+extern struct class nvmem_class;
+
 #if IS_ENABLED(CONFIG_NVMEM)
 
 /* Cell based interface */
-- 
2.39.5