[PATCH 01/13] dt-bindings: iio: adc: add mt6323 PMIC AUXADC

[Roman Vivchar via B4 Relay <devnull+rva333.protonmail.com@kernel.org>]

From: Roman Vivchar <rva333@protonmail.com>

The MediaTek mt6323 PMIC includes an AUXADC used for battery voltage,
temperature, and other internal measurements.

Add the devicetree binding documentation and the associated header file
defining the ADC channel constants.

Tested-by: Ben Grisdale <bengris32@protonmail.ch> # Amazon Echo Dot (2nd Generation)
Signed-off-by: Roman Vivchar <rva333@protonmail.com>
---
 .../bindings/iio/adc/mediatek,mt6323-auxadc.yaml   | 39 ++++++++++++++++++++++
 .../dt-bindings/iio/adc/mediatek,mt6323-auxadc.h   | 16 +++++++++
 2 files changed, 55 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/mediatek,mt6323-auxadc.yaml b/Documentation/devicetree/bindings/iio/adc/mediatek,mt6323-auxadc.yaml
new file mode 100644
index 000000000000..7dc1ac8bf253
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/mediatek,mt6323-auxadc.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/mediatek,mt6323-auxadc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6323 PMIC AUXADC
+
+maintainers:
+  - Roman Vivchar <rva333@protonmail.com>
+
+description: >
+  The Auxiliary Analog/Digital Converter (AUXADC) is an ADC found
+  in the MediaTek MT6323 PMIC, performing various PMIC related measurements
+  such as battery and PMIC internal voltage regulators temperatures,
+  accessory detection resistance (usually, for a 3.5mm audio jack)
+  other than voltages for various PMIC internal components.
+
+properties:
+  compatible:
+    const: mediatek,mt6323-auxadc
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - "#io-channel-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/iio/adc/mediatek,mt6323-auxadc.h>
+
+    adc {
+        compatible = "mediatek,mt6323-auxadc";
+        #io-channel-cells = <1>;
+    };
diff --git a/include/dt-bindings/iio/adc/mediatek,mt6323-auxadc.h b/include/dt-bindings/iio/adc/mediatek,mt6323-auxadc.h
new file mode 100644
index 000000000000..c12a21e7ddea
--- /dev/null
+++ b/include/dt-bindings/iio/adc/mediatek,mt6323-auxadc.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+
+#ifndef _DT_BINDINGS_MEDIATEK_MT6323_AUXADC_H
+#define _DT_BINDINGS_MEDIATEK_MT6323_AUXADC_H
+
+#define MT6323_AUXADC_BATON2 0
+#define MT6323_AUXADC_CH6 1
+#define MT6323_AUXADC_BAT_TEMP 2
+#define MT6323_AUXADC_CHIP_TEMP 3
+#define MT6323_AUXADC_VCDT 4
+#define MT6323_AUXADC_BATON1 5
+#define MT6323_AUXADC_ISENSE 6
+#define MT6323_AUXADC_BATSNS 7
+#define MT6323_AUXADC_ACCDET 8
+
+#endif

-- 
2.53.0