Re: [PATCH V4 3/4] nvmem: core: export nvmem_add_cells_from_of()

From: Michael Walle <michael@walle.cc>
To: "Rafał Miłecki" <zajec5@gmail.com>
Cc: "Rob Herring" <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
	"Srinivas Kandagatla" <srinivas.kandagatla@linaro.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Miquel Raynal" <miquel.raynal@bootlin.com>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Rafał Miłecki" <rafal@milecki.pl>
Subject: Re: [PATCH V4 3/4] nvmem: core: export nvmem_add_cells_from_of()
Date: Mon, 20 Mar 2023 09:23:11 +0100	[thread overview]
Message-ID: <01b2adc922951f7d8cd74bc7bb1b42f1@walle.cc> (raw)
In-Reply-To: <20230317132620.31142-4-zajec5@gmail.com>

Am 2023-03-17 14:26, schrieb Rafał Miłecki:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> This symbol can be cleanly re-used by the fixed NVMEM layout driver.
> Allow passing DT node as argument to make it a bit more generic.
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> ---
>  drivers/nvmem/core.c           | 7 ++++---
>  include/linux/nvmem-provider.h | 7 +++++++
>  2 files changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 212c5ba5789f..985a42cfb0a2 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -694,7 +694,7 @@ static int nvmem_validate_keepouts(struct
> nvmem_device *nvmem)
>  	return 0;
>  }
> 
> -static int nvmem_add_cells_from_of(struct nvmem_device *nvmem)
> +int nvmem_add_cells_from_of(struct nvmem_device *nvmem, struct 
> device_node *np)

I'm not sure, how to feel about exposing an "internal" function to
the layouts module. I mean all these nvmem_add_cells_from_* are internal
to the core. Also the help text of the add_cells() callback tells you to
use nvmem_add_one_cell().

Although there is a bit of code duplication, I'd rather refactor
the nvmem_add_cells_from_of() to split it into parsing and adding.
Then re-use just the parsing from the fixed layout module and
call the appropriate nvmem_add_one_cell() yourself there.

-michael