dt-bindings: soc: mobileye: Add EyeQ6Lplus OLB

The "Other Logic Block" found in the EyeQ6Lplus from Mobileye provides
various functions for the controllers present in the SoC.

The OLB produces 22 clocks derived from its input, which is connected
to the main oscillator of the SoC.

It provides reset signals via two reset domains.

It also controls 32 pins to be either a GPIO or an alternate function.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

1 files changed, 208 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq6lplus-olb.yaml b/Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq6lplus-olb.yaml
new file mode 100644
index 000000000000..8334876cf4e6
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/mobileye/mobileye,eyeq6lplus-olb.yaml
@@ -0,0 +1,208 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/mobileye/mobileye,eyeq6lplus-olb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mobileye EyeQ6Lplus SoC system controller
+
+maintainers:
+  - Benoît Monin <benoit.monin@bootlin.com>
+  - 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. EyeQ6Lplus hosts
+  a single instance providing 22 clocks, two reset domains and one bank
+  of 32 pins.
+
+properties:
+  compatible:
+    items:
+      - const: mobileye,eyeq6lplus-olb
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  '#reset-cells':
+    description:
+      First cell is reset domain index.
+      Second cell is reset index inside that domain.
+    const: 2
+
+  '#clock-cells':
+    const: 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.
+    $ref: /schemas/pinctrl/pinmux-node.yaml#
+    additionalProperties: false
+    properties:
+      pins: true
+      function:
+        enum: [gpio, timer0, timer1, uart_ssi, spi0, uart0, timer2, timer3,
+               timer_ext0, spi1, timer_ext1, ext_ref_clk, mipi_ref_clk]
+      bias-disable: true
+      bias-pull-down: true
+      bias-pull-up: true
+      drive-strength: true
+    required:
+      - pins
+      - function
+    allOf:
+      - if:
+          properties:
+            function:
+              const: gpio
+        then:
+          properties:
+            pins:
+              items: # PA0 - PA31
+                pattern: '^(PA[1,2]?[0-9]|PA3[0,1])$'
+      - 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: uart_ssi
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA4, PA5]
+      - if:
+          properties:
+            function:
+              const: spi0
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA6, PA7, PA8, PA9, PA10]
+      - if:
+          properties:
+            function:
+              const: uart0
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA11, PA12]
+      - if:
+          properties:
+            function:
+              const: timer2
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA13, PA14]
+      - if:
+          properties:
+            function:
+              const: timer3
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA15, PA16]
+      - if:
+          properties:
+            function:
+              const: timer_ext0
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA17, PA18, PA19, PA20]
+      - if:
+          properties:
+            function:
+              const: spi1
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA21, PA22, PA23, PA24, PA25]
+      - if:
+          properties:
+            function:
+              const: timer_ext1
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA26, PA27, PA28, PA29]
+      - if:
+          properties:
+            function:
+              const: ext_ref_clk
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA30]
+      - if:
+          properties:
+            function:
+              const: mipi_ref_clk
+        then:
+          properties:
+            pins:
+              items:
+                enum: [PA31]
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - clocks
+  - clock-names
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      system-controller@e8400000 {
+        compatible = "mobileye,eyeq6lplus-olb", "syscon";
+        reg = <0 0xe8400000 0x0 0x80000>;
+        #reset-cells = <2>;
+        #clock-cells = <1>;
+        clocks = <&xtal>;
+        clock-names = "ref";
+      };
+    };