linux-kernel - Re: [PATCH v5 7/9] dt-bindings: memory: tegra20: emc: Document new LPDDR2 sub-node

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Message-ID: <YWimmE+DMtLpRmEU@robh.at.kernel.org>
Date:   Thu, 14 Oct 2021 16:52:24 -0500
From:   Rob Herring <robh@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v5 7/9] dt-bindings: memory: tegra20: emc: Document new
 LPDDR2 sub-node

On Thu, 07 Oct 2021 01:46:57 +0300, Dmitry Osipenko wrote:
> Some Tegra20 boards don't have RAM code stored in NVMEM, which is used for
> the memory chip identification and the identity information should be read
> out from LPDDR2 chip in this case. Document new sub-node containing generic
> LPDDR2 properties that will be used for the memory chip identification if
> RAM code isn't available. The identification is done by reading out memory
> configuration values from generic LPDDR2 mode registers of SDRAM chip and
> comparing them with the values of device-tree 'lpddr2' sub-node.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  .../nvidia,tegra20-emc.yaml                   | 23 +++++++++++++++++--
>  1 file changed, 21 insertions(+), 2 deletions(-)
> 

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