Message-ID: <35870fce-210b-d3ab-df7a-e4e49ce49391@gmail.com>
Date:   Sat, 18 Mar 2023 21:32:21 +0800
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Subject: Re: [PATCH 11/15] arm64: dts: nuvoton: Add initial ma35d1 device tree
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To:     Lee Jones <lee@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Cc:     Rob Herring <robh+dt@kernel.org>,
        krzysztof.kozlowski+dt@linaro.org,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jirislaby@kernel.org>, devicetree@vger.kernel.org,
        linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-serial@vger.kernel.org, schung@nuvoton.com,
        Jacky Huang <ychuang3@nuvoton.com>
References: <20230315072902.9298-1-ychuang570808@gmail.com>
 <20230315072902.9298-12-ychuang570808@gmail.com>
 <2063c6d1-85ed-43d9-b572-a762b6ce18c1@app.fastmail.com>
 <20230316164428.GY9667@google.com>
From:   Jacky Huang <ychuang570808@gmail.com>
In-Reply-To: <20230316164428.GY9667@google.com>
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Hi Lee,


Thanks for your attentions.


On 2023/3/17 上午 12:44, Lee Jones wrote:
> On Thu, 16 Mar 2023, Arnd Bergmann wrote:
>
>> On Wed, Mar 15, 2023, at 08:28, Jacky Huang wrote:
>>> +	mem: memory@80000000 {
>>> +		device_type = "memory";
>>> +		reg = <0x00000000 0x80000000 0 0x20000000>; /* 512M DRAM */
>>> +	};
>>> +};
>> In most machines, the memory size is detected by the boot loader
>> and filled in the dtb in memory before starting the kernel, so
>> you should not need two separate files here for the two common
>> memory configurations.
>>
>> Since the machine is called 'som', I would assume that this is a
>> module that is integrated on another board, so more commonly one
>> would have a dtsi file for the som in addition to the one for the
>> soc, and have all the components of the module listed in this
>> file, while the dts file that includes the som.dtsi lists the
>> devices on the carrier board and enables the on-chip devices
>> that are connected to the outside.
> It's using syscon and simple-mfd by the looks of it.
>
> --
> Lee Jones [李琼斯]


We just copy from what other chips's dts have done.

This seems be defined in Documentation\devicetree\bindings\numa.txt.


Best regards,

Jacky Huang