linux-kernel - Re: [PATCH v2 1/2] dt-binding: mtd: denali

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Message-ID: <20191219204107.GA7670@bogus>
Date:   Thu, 19 Dec 2019 14:41:07 -0600
From:   Rob Herring <robh@...nel.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-mtd@...ts.infradead.org, Dinh Nguyen <dinguyen@...nel.org>,
        Marek Vasut <marex@...x.de>,
        Ley Foon Tan <ley.foon.tan@...el.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        devicetree@...r.kernel.org, Philipp Zabel <p.zabel@...gutronix.de>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Mark Rutland <mark.rutland@....com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-binding: mtd: denali_dt: document reset
 property

On Wed, 11 Dec 2019 14:45:37 +0900, Masahiro Yamada wrote:
> According to the Denali NAND Flash Memory Controller User's Guide,
> this IP has two reset signals.
> 
>   rst_n:     reset most of FFs in the controller core
>   reg_rst_n: reset all FFs in the register interface, and in the
>              initialization sequencer
> 
> This commit specifies those reset signals.
> 
> It is possible to control them separately from the IP point of view
> although they might be often tied up together in actual SoC integration.
> 
> At least for the upstream platforms, Altera/Intel SOCFPGA and Socionext
> UniPhier, the reset controller seems to provide only 1-bit control for
> the NAND controller. If it is the case, the resets property should
> reference to the same phandles for "nand" and "reg" resets, like this:
> 
>     resets = <&nand_rst>, <&nand_rst>;
>     reset-names = "nand", "reg";
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
> 
> Changes in v2:
>  - Split into two patches
> 
>  Documentation/devicetree/bindings/mtd/denali-nand.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
> 

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