linux-kernel - Re: [PATCH 08/11] MIPS: mobileye: eyeq5: add OLB syscon node

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Message-Id: <D0HD94HI3W7W.3KLAW6WFIN6ZE@bootlin.com>
Date: Thu, 11 Apr 2024 16:34:18 +0200
From: Théo Lebrun <theo.lebrun@...tlin.com>
To: "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>, "Rob Herring"
 <robh@...nel.org>, "Krzysztof Kozlowski"
 <krzysztof.kozlowski+dt@...aro.org>, "Conor Dooley" <conor+dt@...nel.org>,
 "Michael Turquette" <mturquette@...libre.com>, "Stephen Boyd"
 <sboyd@...nel.org>, "Philipp Zabel" <p.zabel@...gutronix.de>, "Linus
 Walleij" <linus.walleij@...aro.org>
Cc: <linux-mips@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>,
 <linux-gpio@...r.kernel.org>, "Vladimir Kondratiev"
 <vladimir.kondratiev@...ileye.com>, "Gregory CLEMENT"
 <gregory.clement@...tlin.com>, "Thomas Petazzoni"
 <thomas.petazzoni@...tlin.com>, "Tawfik Bayouk"
 <tawfik.bayouk@...ileye.com>
Subject: Re: [PATCH 08/11] MIPS: mobileye: eyeq5: add OLB syscon node

Hello,

On Thu Apr 11, 2024 at 8:15 AM CEST, Krzysztof Kozlowski wrote:
> On 10/04/2024 19:12, Théo Lebrun wrote:
> > The OLB ("Other Logic Block") is a syscon region hosting clock, reset
> > and pin controllers. It contains registers such as I2C speed mode that
> > need to be accessible by other nodes.
> > 
> > Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
> > ---
> >  arch/mips/boot/dts/mobileye/eyeq5.dtsi | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/arch/mips/boot/dts/mobileye/eyeq5.dtsi b/arch/mips/boot/dts/mobileye/eyeq5.dtsi
> > index 6cc5980e2fa1..e82d2a57f6da 100644
> > --- a/arch/mips/boot/dts/mobileye/eyeq5.dtsi
> > +++ b/arch/mips/boot/dts/mobileye/eyeq5.dtsi
> > @@ -100,6 +100,14 @@ uart2: serial@...000 {
> >  			clock-names = "uartclk", "apb_pclk";
> >  		};
> >  
> > +		olb: system-controller@...000 {
> > +			compatible = "mobileye,eyeq5-olb", "syscon", "simple-mfd";
> > +			reg = <0 0xe00000 0x0 0x400>;
> > +			ranges = <0x0 0x0 0xe00000 0x400>;
> > +			#address-cells = <1>;
> > +			#size-cells = <1>;
>
> Do not add incomplete node. ranges, address/size-cells are incorrect in
> this context and you will have warnings.
>
> Add complete node, so these properties make sense.

I'll squash all four commits into one. For reference, commits are:

 - MIPS: mobileye: eyeq5: add OLB syscon node
 - MIPS: mobileye: eyeq5: use OLB clocks controller node
 - MIPS: mobileye: eyeq5: add OLB reset controller node
 - MIPS: mobileye: eyeq5: add pinctrl node & pinmux function nodes

This means two things: (1) it won't be partially applicable and (2) it
will make one big commit adding pins and editing clocks.

Thanks,

--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com