* [RFC 1/8] dt-bindings: mfd: add Khadas Microcontroller bindings
[not found] <20200421080102.22796-1-narmstrong@baylibre.com>
@ 2020-04-21 8:00 ` Neil Armstrong
2020-05-06 20:12 ` Rob Herring
0 siblings, 1 reply; 2+ messages in thread
From: Neil Armstrong @ 2020-04-21 8:00 UTC (permalink / raw)
To: lee.jones, jdelvare, linux, srinivas.kandagatla, devicetree
Cc: nick, art, Neil Armstrong, linux-amlogic, linux-hwmon,
linux-arm-kernel, linux-kernel
This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
boards.
It has multiple boot control features like password check, power-on
options, power-off control and system FAN control on recent boards.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
.../devicetree/bindings/mfd/khadas,mcu.yaml | 44 +++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
diff --git a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
new file mode 100644
index 000000000000..a3b976f101e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/khadas,mcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Khadas on-board Microcontroller Device Tree Bindings
+
+maintainers:
+ - Neil Armstrong <narmstrong@baylibre.com>
+
+description: |
+ Khadas embeds a microcontroller on their VIM and Edge boards adding some
+ system feature as PWM Fan control (for VIM2 rev14 or VIM3), User memory
+ storage, IR/Key resume control, system power LED control and more.
+
+properties:
+ compatible:
+ enum:
+ - khadas,mcu # MCU revision is discoverable
+
+ "#cooling-cells": # Only needed for boards having FAN control feature
+ const: 2
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ khadas_mcu: system-controller@18 {
+ compatible = "khadas,mcu";
+ reg = <0x18>;
+ #cooling-cells = <2>;
+ };
+ };
--
2.22.0
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