From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Kozlowski Date: Thu, 19 Sep 2024 12:32:28 +0200 Subject: [PATCH v3 1/4] dt-bindings: mfd: aspeed: support for AST2700 In-Reply-To: References: <20240916091039.3584505-1-ryan_chen@aspeedtech.com> <20240916091039.3584505-2-ryan_chen@aspeedtech.com> <9b356379-907c-4112-8e24-1810cfa40ef6@kernel.org> Message-ID: <3185f620-28be-49b8-85f4-7ff8dd5ffce0@kernel.org> List-Id: To: linux-aspeed@lists.ozlabs.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 19/09/2024 09:13, Ryan Chen wrote: >> Subject: Re: [PATCH v3 1/4] dt-bindings: mfd: aspeed: support for AST2700 >> >> On 19/09/2024 08:05, Ryan Chen wrote: >>>>> diff --git >>>>> a/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml >>>>> b/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml >>>>> index 86ee69c0f45b..127a357051cd 100644 >>>>> --- a/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml >>>>> +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml >>>>> @@ -9,6 +9,8 @@ title: Aspeed System Control Unit >>>>> description: >>>>> The Aspeed System Control Unit manages the global behaviour of >>>>> the >>>> SoC, >>>>> configuring elements such as clocks, pinmux, and reset. >>>>> + In AST2700 SOC which has two soc connection, each soc have its >>>>> + own scu register control, ast2700-scu0 for soc0, ast2700-scu1 for >> soc1. >>>>> >>>>> maintainers: >>>>> - Joel Stanley >>>>> @@ -21,6 +23,8 @@ properties: >>>>> - aspeed,ast2400-scu >>>>> - aspeed,ast2500-scu >>>>> - aspeed,ast2600-scu >>>>> + - aspeed,ast2700-scu0 >>>>> + - aspeed,ast2700-scu1 >>>>> - const: syscon >>>>> - const: simple-mfd >>>>> >>>>> @@ -30,10 +34,12 @@ properties: >>>>> ranges: true >>>>> >>>>> '#address-cells': >>>>> - const: 1 >>>>> + minimum: 1 >>>>> + maximum: 2 >>>>> >>>>> '#size-cells': >>>>> - const: 1 >>>>> + minimum: 1 >>>>> + maximum: 2 >>>> >>>> Why do the children have 64 bit addressing? >>> >>> AST2700 is 64bit address, so it also. >> >> But why do they need it? >> > Sorry, I may not understand your point. I asked why do you think children require 64-bit addressing, instead of working with existing 32-bit address. > Since address-cell = <2>, Do you mean size-cell still 1? No... although that's another point, how bug address size is there? For the children? > If yes. I do the dts check it need size-cells=<2>, when I do address-cells = <2> Well, I talk about bus and children addressing. It's kind of obvious that changing one property means using different reg... Best regards, Krzysztof