[PATCH 4/6] dt-bindings: mfd: sensehat: Add Raspberry Pi Sense HAT schema

[Charles Mirabile]

This patch adds the device tree bindings for the Sense HAT
and each of its children devices in yaml form.

Co-developed-by: Mwesigwa Guma <mguma at redhat.com>
Signed-off-by: Mwesigwa Guma <mguma at redhat.com>
Co-developed-by: Joel Savitz <jsavitz at redhat.com>
Signed-off-by: Joel Savitz <jsavitz at redhat.com>
Signed-off-by: Charles Mirabile <cmirabil at redhat.com>
---
 .../raspberrypi,sensehat-display.yaml         | 32 +++++++++
 .../input/raspberrypi,sensehat-joystick.yaml  | 37 ++++++++++
 .../bindings/mfd/raspberrypi,sensehat.yaml    | 68 +++++++++++++++++++
 3 files changed, 137 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-display.yaml
 create mode 100644 Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick.yaml
 create mode 100644 Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml

diff --git a/Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-display.yaml b/Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-display.yaml
new file mode 100644
index 000000000000..8937adba1c4b
--- /dev/null
+++ b/Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-display.yaml
@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+$id: http://devicetree.org/schemas/auxdisplay/raspberrypi,sensehat-display.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raspberry Pi Sensehat Display
+
+maintainers:
+  - Charles Mirabile <cmirabil at redhat.com>
+  - Mwesigwa Guma <mguma at redhat.com>
+  - Joel Savitz <jsavitz at redhat.com>
+
+description:
+  This device is part of the sensehat multi function device.
+  For more information see ../mfd/raspberrypi,sensehat.yaml.
+
+  This device features a programmable 8x8 RGB LED matrix.
+
+properties:
+  compatible:
+    const: raspberrypi,sensehat-display
+
+  reg:
+    items:
+      - description: |
+          smb register number for the first component of the fist
+          pixel in the range.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick.yaml b/Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick.yaml
new file mode 100644
index 000000000000..a6d95c903b04
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+$id: http://devicetree.org/schemas/input/raspberrypi,sensehat-joystick.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raspberry Pi Sensehat Joystick
+
+maintainers:
+  - Charles Mirabile <cmirabil at redhat.com>
+  - Mwesigwa Guma <mguma at redhat.com>
+  - Joel Savitz <jsavitz at redhat.com>
+
+description:
+  This device is part of the sensehat multi function device.
+  For more information see ../mfd/raspberrypi,sensehat.yaml.
+
+  This device features a five button joystick (up, down,left,
+  right, click)
+
+properties:
+  compatible:
+    const: raspberrypi,sensehat-joystick
+
+  reg:
+    items:
+      - description: |
+          smb register number for accessing the state of the buttons
+
+  interrupts:
+    items:
+      - description: pin number for joystick interrupt
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml b/Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml
new file mode 100644
index 000000000000..89037be87c10
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+$id: http://devicetree.org/schemas/mfd/raspberrypi,sensehat.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raspberry Pi Sensehat
+
+maintainers:
+  - Charles Mirabile <cmirabil at redhat.com>
+  - Mwesigwa Guma <mguma at redhat.com>
+  - Joel Savitz <jsavitz at redhat.com>
+
+description:
+  The Raspberry Pi Sensehat is an addon board originally developed
+  for the Raspberry Pi that has a joystick and an 8x8 RGB LED display
+  as well as several environmental sensors. It connects via i2c and
+  a gpio for irq.
+
+properties:
+  compatible:
+    const: raspberrypi,sensehat
+
+  reg:
+    items:
+      - description: i2c device address
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^joystick(@[0-9a-f]+)?$":
+    $ref: ../input/raspberrypi,sensehat-joystick.yaml
+
+  "^display(@[0-9a-f]+)?$":
+    $ref: ../auxdisplay/raspberrypi,sensehat-display.yaml
+
+required:
+  - "#address-cells"
+  - "#size-cells"
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      sensehat at 46 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "raspberrypi,sensehat";
+        reg = <0x46>;
+        display at 0 {
+          compatible = "raspberrypi,sensehat-display";
+          reg = <0x0>;
+        };
+        joystick at f2 {
+          compatible = "raspberrypi,sensehat-joystick";
+          reg = <0x0>;
+          interrupts = <23 GPIO_ACTIVE_HIGH>;
+        };
+      };
+    };
-- 
2.31.1