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Message-ID: <35870fce-210b-d3ab-df7a-e4e49ce49391@gmail.com> Date: Sat, 18 Mar 2023 21:32:21 +0800 From: Jacky Huang <ychuang570808@...il.com> To: Lee Jones <lee@...nel.org>, Arnd Bergmann <arnd@...db.de> Cc: Rob Herring <robh+dt@...nel.org>, krzysztof.kozlowski+dt@...aro.org, Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby <jirislaby@...nel.org>, devicetree@...r.kernel.org, linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org, schung@...oton.com, Jacky Huang <ychuang3@...oton.com> Subject: Re: [PATCH 11/15] arm64: dts: nuvoton: Add initial ma35d1 device tree 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@...00000 { >>> + 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
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