wt., 13 lis 2018 o 15:01 Bartosz Golaszewski <brgl@xxxxxxxx> napisał(a):
>
> From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
>
> We want to add nvmem support for MTD. TI DaVinci is the first platform
> that will be using it, but only in non-DT mode. In order not to
> introduce any new interface to supporting of which we would have to
> commit - add a new config option that tells nvmem not to use the DT
> node of the parent device.
>
> This way we won't be creating nvmem devices corresponding with MTD
> partitions defined in device tree. By default MTD will set this new
> field to true.
>
> Once a set of bindings for MTD nvmem cells is agreed upon, we'll be
> able to remove this option.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
> ---
> drivers/nvmem/core.c | 3 ++-
> include/linux/nvmem-provider.h | 2 ++
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 9b18ce90f907..ac7971e8154e 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -604,7 +604,8 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
> nvmem->priv = config->priv;
> nvmem->reg_read = config->reg_read;
> nvmem->reg_write = config->reg_write;
> - nvmem->dev.of_node = config->dev->of_node;
> + if (!config->no_of_node)
> + nvmem->dev.of_node = config->dev->of_node;
>
> if (config->id == -1 && config->name) {
> dev_set_name(&nvmem->dev, "%s", config->name);
> diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
> index 1e3283c2af77..e53545e9852b 100644
> --- a/include/linux/nvmem-provider.h
> +++ b/include/linux/nvmem-provider.h
> @@ -30,6 +30,7 @@ typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset,
> * @ncells: Number of elements in cells.
> * @read_only: Device is read-only.
> * @root_only: Device is accessibly to root only.
> + * @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.
> @@ -53,6 +54,7 @@ struct nvmem_config {
> int ncells;
> bool read_only;
> bool root_only;
> + bool no_of_node;
> nvmem_reg_read_t reg_read;
> nvmem_reg_write_t reg_write;
> int size;
> --
> 2.19.1
>
Hi Srinivas,
if there are no objections - can you Ack this patch for Greg to pick
up into char-misc?
Bart
