Revert "nvmem: add new config option"

This reverts commit 517f14d.

It seems that "no_of_node" config option was added to help mtd's case.

DT nodes of MTD partitions (that are also NVMEM devices) may contain
subnodes that SHOULD NOT be treated as NVMEM fixed cells. To prevent
NVMEM core code from parsing them "no_of_node" was set to true and that
made for_each_child_of_node() in NVMEM a no-op.

With the introduction of "add_legacy_fixed_of_cells" config option
things got more explicit. MTD subsystem simply tells NVMEM when to look
for fixed cells and there is no need to hack "of_node" pointer anymore.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

Author: Rafał Miłecki

drivers/mtd/mtdcore.c

@@ -559,7 +559,6 @@ static int mtd_nvmem_add(struct mtd_info *mtd)
 	config.read_only = true;
 	config.root_only = true;
 	config.ignore_wp = true;
-	config.no_of_node = !of_device_is_compatible(node, "nvmem-cells");
 	config.priv = mtd;
 
 	mtd->nvmem = nvmem_register(&config);

drivers/nvmem/core.c

@@ -935,7 +935,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	nvmem->nkeepout = config->nkeepout;
 	if (config->of_node)
 		nvmem->dev.of_node = config->of_node;
-	else if (!config->no_of_node)
+	else
 		nvmem->dev.of_node = config->dev->of_node;
 
 	switch (config->id) {

include/linux/nvmem-provider.h

@@ -88,7 +88,6 @@ struct nvmem_cell_info {
  * @read_only:	Device is read-only.
  * @root_only:	Device is accessibly to root only.
  * @of_node:	If given, this will be used instead of the parent's of_node.
- * @no_of_node:	Device should not use the parent's of_node even if it's !NULL.
  * @reg_read:	Callback to read data.
  * @reg_write:	Callback to write data.
  * @size:	Device size.
@@ -120,7 +119,6 @@ struct nvmem_config {
 	bool			ignore_wp;
 	struct nvmem_layout	*layout;
 	struct device_node	*of_node;
-	bool			no_of_node;
 	nvmem_reg_read_t	reg_read;
 	nvmem_reg_write_t	reg_write;
 	int	size;