Re: [PATCH] Revert "nvmem: add new config option"

[Rafał Miłecki]

Hi Srini,

On 18.07.2023 10:48, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@xxxxxxxxxx>
>
> This reverts commit 517f14d9cf3533d5ab4fded195ab6f80a92e378f.
>
> 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@xxxxxxxxxx>
> ---
> Important: this is based on top of the
> [PATCH V4] nvmem: add explicit config option to read old syntax fixed OF cells

I see you skipped those two patches for 6.6.

Can you queue them for 6.7, please?


> ---
>   drivers/mtd/mtdcore.c          | 1 -
>   drivers/nvmem/core.c           | 2 +-
>   include/linux/nvmem-provider.h | 2 --
>   3 files changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index 9db8d7853639..3d781ffb8c32 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -554,7 +554,6 @@ 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);
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 58d8919e6682..a0c9153cda28 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -1027,7 +1027,7 @@ 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) {
> diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
> index 1b81adebdb8b..e3930835235b 100644
> --- a/include/linux/nvmem-provider.h
> +++ b/include/linux/nvmem-provider.h
> @@ -89,7 +89,6 @@ 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.
> @@ -122,7 +121,6 @@ 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;