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

["Théo Lebrun" <theo.lebrun@bootlin.com>]

Hello,

On Thu Apr 11, 2024 at 5:07 PM CEST, Krzysztof Kozlowski wrote:
> On 11/04/2024 16:34, Théo Lebrun wrote:
> > 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@bootlin.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@a00000 {
> >>>  			clock-names = "uartclk", "apb_pclk";
> >>>  		};
> >>>  
> >>> +		olb: system-controller@e00000 {
> >>> +			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
>
> Why?
>
> > will make one big commit adding pins and editing clocks.
>
> It never was partially applicable. Causing warnings does not make things
> partially applicable. If node is too big, although I personally do not
> agree, it's quite moderate size chunk, then sure, split pinctrl groups
> or pinctrl node to additional patch.

Thanks for feedback; it'll become a single patch as it is fine with you.

Regards,

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