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dt-bindings: soc: mobileye: add EyeQ OLB system controller

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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. Some instances DO NOT have reset.
 - Pinctrl. Only EyeQ5 has such feature.

Those are NOT the only features exposed in OLB system-controllers! Many
individual registers, related to IP block integration, can be found.
Additional features will be exposed over time.

We simplify devicetree phandles to OLB in two ways:

 - Compatibles exposing a single clock do not ask for a index argument.
   This means we use EyeQ6H OLB south (it has four clocks):

      clocks = <&olb_south EQ6HC_SOUTH_PLL_PER>;

   But use EyeQ6H OLB east (it has one clock):

      clocks = <&olb_east>;

 - Compatibles exposing a single reset domain do not ask for a domain
   index, only a reset index.
   This means we use EyeQ5 OLB (it has three domains):

     resets = <&olb 0 10>;

   But use EyeQ6H west reset (it has one domain):

      resets = <&olb_west 3>;

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.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Théo Lebrun 2024-06-28 18:11:50 +02:00 committed by Thomas Bogendoerfer
parent 02c76df921
commit bde4b22dc5
1 changed files with 374 additions and 0 deletions
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Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq5-olb.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/soc/mobileye/mobileye,eyeq5-olb.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Mobileye EyeQ SoC system controller
maintainers:
- Grégory Clement <gregory.clement@bootlin.com>
- Théo Lebrun <theo.lebrun@bootlin.com>
- Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>
description:
OLB ("Other Logic Block") is a hardware block grouping smaller blocks. Clocks,
resets, pinctrl are being handled from here. EyeQ5 and EyeQ6L host a single
instance. EyeQ6H hosts seven instances.
properties:
compatible:
items:
- enum:
- mobileye,eyeq5-olb
- mobileye,eyeq6l-olb
- mobileye,eyeq6h-acc-olb
- mobileye,eyeq6h-central-olb
- mobileye,eyeq6h-east-olb
- mobileye,eyeq6h-west-olb
- mobileye,eyeq6h-south-olb
- mobileye,eyeq6h-ddr0-olb
- mobileye,eyeq6h-ddr1-olb
- const: syscon
reg:
maxItems: 1
'#reset-cells':
description:
First cell is domain and optional if compatible has a single reset domain.
Second cell is reset index inside that domain.
enum: [ 1, 2 ]
'#clock-cells':
description:
Cell is clock index. Optional if compatible has a single clock.
enum: [ 0, 1 ]
clocks:
maxItems: 1
description:
Input parent clock to all PLLs. Expected to be the main crystal.
clock-names:
const: ref
patternProperties:
'-pins?$':
type: object
description: Pin muxing configuration.
$ref: /schemas/pinctrl/pinmux-node.yaml#
additionalProperties: false
properties:
pins: true
function:
enum: [gpio,
# Bank A
timer0, timer1, timer2, timer5, uart0, uart1, can0, can1, spi0,
spi1, refclk0,
# Bank B
timer3, timer4, timer6, uart2, can2, spi2, spi3, mclk0]
bias-disable: true
bias-pull-down: true
bias-pull-up: true
drive-strength: true
required:
- pins
- function
allOf:
- if:
properties:
function:
const: gpio
then:
properties:
pins:
items: # PA0 - PA28, PB0 - PB22
pattern: '^(P(A|B)1?[0-9]|PA2[0-8]|PB2[0-2])$'
- if:
properties:
function:
const: timer0
then:
properties:
pins:
items:
enum: [PA0, PA1]
- if:
properties:
function:
const: timer1
then:
properties:
pins:
items:
enum: [PA2, PA3]
- if:
properties:
function:
const: timer2
then:
properties:
pins:
items:
enum: [PA4, PA5]
- if:
properties:
function:
const: timer5
then:
properties:
pins:
items:
enum: [PA6, PA7, PA8, PA9]
- if:
properties:
function:
const: uart0
then:
properties:
pins:
items:
enum: [PA10, PA11]
- if:
properties:
function:
const: uart1
then:
properties:
pins:
items:
enum: [PA12, PA13]
- if:
properties:
function:
const: can0
then:
properties:
pins:
items:
enum: [PA14, PA15]
- if:
properties:
function:
const: can1
then:
properties:
pins:
items:
enum: [PA16, PA17]
- if:
properties:
function:
const: spi0
then:
properties:
pins:
items:
enum: [PA18, PA19, PA20, PA21, PA22]
- if:
properties:
function:
const: spi1
then:
properties:
pins:
items:
enum: [PA23, PA24, PA25, PA26, PA27]
- if:
properties:
function:
const: refclk0
then:
properties:
pins:
items:
enum: [PA28]
- if:
properties:
function:
const: timer3
then:
properties:
pins:
items:
enum: [PB0, PB1]
- if:
properties:
function:
const: timer4
then:
properties:
pins:
items:
enum: [PB2, PB3]
- if:
properties:
function:
const: timer6
then:
properties:
pins:
items:
enum: [PB4, PB5, PB6, PB7]
- if:
properties:
function:
const: uart2
then:
properties:
pins:
items:
enum: [PB8, PB9]
- if:
properties:
function:
const: can2
then:
properties:
pins:
items:
enum: [PB10, PB11]
- if:
properties:
function:
const: spi2
then:
properties:
pins:
items:
enum: [PB12, PB13, PB14, PB15, PB16]
- if:
properties:
function:
const: spi3
then:
properties:
pins:
items:
enum: [PB17, PB18, PB19, PB20, PB21]
- if:
properties:
function:
const: mclk0
then:
properties:
pins:
items:
enum: [PB22]
required:
- compatible
- reg
- '#clock-cells'
- clocks
- clock-names
additionalProperties: false
allOf:
# Compatibles exposing a single reset domain.
- if:
properties:
compatible:
contains:
enum:
- mobileye,eyeq6h-acc-olb
- mobileye,eyeq6h-east-olb
- mobileye,eyeq6h-west-olb
then:
properties:
'#reset-cells':
const: 1
required:
- '#reset-cells'
# Compatibles exposing two reset domains.
- if:
properties:
compatible:
contains:
enum:
- mobileye,eyeq5-olb
- mobileye,eyeq6l-olb
then:
properties:
'#reset-cells':
const: 2
required:
- '#reset-cells'
# Compatibles not exposing resets.
- if:
properties:
compatible:
contains:
enum:
- mobileye,eyeq6h-central-olb
- mobileye,eyeq6h-south-olb
- mobileye,eyeq6h-ddr0-olb
- mobileye,eyeq6h-ddr1-olb
then:
properties:
'#reset-cells': false
# Compatibles exposing a single clock.
- if:
properties:
compatible:
contains:
enum:
- mobileye,eyeq6h-central-olb
- mobileye,eyeq6h-east-olb
- mobileye,eyeq6h-west-olb
- mobileye,eyeq6h-ddr0-olb
- mobileye,eyeq6h-ddr1-olb
then:
properties:
'#clock-cells':
const: 0
else:
properties:
'#clock-cells':
const: 1
# Only EyeQ5 has pinctrl in OLB.
- if:
not:
properties:
compatible:
contains:
const: mobileye,eyeq5-olb
then:
patternProperties:
'-pins?$': false
examples:
- |
soc {
#address-cells = <2>;
#size-cells = <2>;
system-controller@e00000 {
compatible = "mobileye,eyeq5-olb", "syscon";
reg = <0 0xe00000 0x0 0x400>;
#reset-cells = <2>;
#clock-cells = <1>;
clocks = <&xtal>;
clock-names = "ref";
};
};
- |
soc {
#address-cells = <2>;
#size-cells = <2>;
system-controller@d2003000 {
compatible = "mobileye,eyeq6h-acc-olb", "syscon";
reg = <0x0 0xd2003000 0x0 0x1000>;
#reset-cells = <1>;
#clock-cells = <1>;
clocks = <&xtal>;
clock-names = "ref";
};
};