linux-kernel - Re: [PATCH v3 3/3] of: base: add of_parse_phandle_with_optional

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Message-ID: <Ye62fhOgaojt6Uqj@robh.at.kernel.org>
Date:   Mon, 24 Jan 2022 08:23:58 -0600
From:   Rob Herring <robh@...nel.org>
To:     Michael Walle <michael@...le.cc>
Cc:     linux-kernel@...r.kernel.org,
        Frank Rowand <frowand.list@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 3/3] of: base: add
 of_parse_phandle_with_optional_args()

On Tue, 18 Jan 2022 18:35:04 +0100, Michael Walle wrote:
> Add a new variant of the of_parse_phandle_with_args() which treats the
> cells name as optional. If it's missing, it is assumed that the phandle
> has no arguments.
> 
> Up until now, a nvmem node didn't have any arguments, so all the device
> trees haven't any '#*-cells' property. But there is a need for an
> additional argument for the phandle, for which we need a '#*-cells'
> property. Therefore, we need to support nvmem nodes with and without
> this property.
> 
> Signed-off-by: Michael Walle <michael@...le.cc>
> ---
> changes since v2:
>  - make index signed
>  - add missing function parameter doc
> 
> changes since v1:
>  - new patch
> 
>  include/linux/of.h | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 

Reviewed-by: Rob Herring <robh@...nel.org>