linux-kernel - Re: [PATCH v2 03/11] dt-bindings: soc: mobileye: add EyeQ OLB system controller

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Date: Tue, 7 May 2024 07:51:52 -0500
From: Rob Herring <robh@...nel.org>
To: Théo Lebrun <theo.lebrun@...tlin.com>
Cc: 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>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>, Lee Jones <lee@...nel.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	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 v2 03/11] dt-bindings: soc: mobileye: add EyeQ OLB system
 controller

On Fri, May 03, 2024 at 04:20:48PM +0200, Théo Lebrun wrote:
> Add documentation to describe the "Other Logic Block" system-controller.
> It deals with three platforms: EyeQ5, EyeQ6L and EyeQ6H. First two have
> a single instance, whereas EyeQ6H has seven named instances.
> 
> Features provided are:
>  - Clocks, children to main crystal. Some PLLs and divider clocks.
>  - Resets. EyeQ6H central, south, DDR0 and DDR1 do not have resets.
>  - Pinctrl. Only EyeQ5 has such feature.
> 
> Those are NOT the only registers exposed in OLB system-controllers! Many
> individual registers, related to IP block integration, can be found.
> 
> We simplify devicetree references to OLB in two ways:
>  - Compatibles exposing a single clock do not ask for a index argument.
>  - Compatibles exposing a single reset domain do not ask for a domain
>    index, only a reset index.
> 
> About pinctrl subnodes: all pins have two functionality, either GPIO or
> something-else. The latter is pin dependent, we express constraints
> using many if-then.
> 
> Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
> ---
>  .../bindings/soc/mobileye/mobileye,eyeq5-olb.yaml  | 375 +++++++++++++++++++++
>  MAINTAINERS                                        |   2 +
>  include/dt-bindings/clock/mobileye,eyeq5-clk.h     |  21 ++
>  3 files changed, 398 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq5-olb.yaml b/Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq5-olb.yaml
> new file mode 100644
> index 000000000000..bbd75b81166e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq5-olb.yaml
> @@ -0,0 +1,375 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/mobileye/mobileye,eyeq5-olb.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mobileye EyeQ SoC system controller
> +
> +maintainers:
> +  - Grégory Clement <gregory.clement@...tlin.com>
> +  - Théo Lebrun <theo.lebrun@...tlin.com>
> +  - Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>
> +
> +description:
> +  OLB ("Other Logic Block") is a hardware block grouping smaller blocks. Clocks,
> +  resets, pinctrl are being handled from here. EyeQ5 and EyeQ6L host a single
> +  instance. EyeQ6H hosts seven instances.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - mobileye,eyeq5-olb
> +          - mobileye,eyeq6l-olb
> +          - mobileye,eyeq6h-acc-olb
> +          - mobileye,eyeq6h-central-olb
> +          - mobileye,eyeq6h-east-olb
> +          - mobileye,eyeq6h-west-olb
> +          - mobileye,eyeq6h-south-olb
> +          - mobileye,eyeq6h-ddr0-olb
> +          - mobileye,eyeq6h-ddr1-olb
> +      - const: syscon
> +      - const: simple-mfd

You are getting rid of the child nodes, so you shouldn't need simple-mfd 
any more.

Rob