[PATCH v6 1/2] dt-bindings: iio: adc: Add the Ingenic X1600 ADC

[Olivier Louvignes <olivier@mgcrea.io>]

The X1600's SAR ADC has four auxiliary channels and none of the
touchscreen or battery engines of the JZ47xx ADCs in ingenic,adc.yaml,
so it gets a binding of its own.

Signed-off-by: Olivier Louvignes <olivier@mgcrea.io>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
---
 .../bindings/iio/adc/ingenic,x1600-adc.yaml   | 59 +++++++++++++++++++
 MAINTAINERS                                   |  5 ++
 2 files changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ingenic,x1600-adc.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/ingenic,x1600-adc.yaml b/Documentation/devicetree/bindings/iio/adc/ingenic,x1600-adc.yaml
new file mode 100644
index 000000000000..f5d4726fdbae
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ingenic,x1600-adc.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ingenic,x1600-adc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ingenic X1600 ADC
+
+maintainers:
+  - Olivier Louvignes <olivier@mgcrea.io>
+
+description:
+  The SAR ADC of the Ingenic X1600 SoC, with four auxiliary input channels
+  measured against an external SADC_VREFP reference (typically 3.3 V).
+
+properties:
+  compatible:
+    const: ingenic,x1600-adc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  '#io-channel-cells':
+    const: 1
+
+  vref-supply:
+    description:
+      The SADC_VREFP reference. If absent, the reference is taken as 3.3 V.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+  - '#io-channel-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    adc@10070000 {
+        compatible = "ingenic,x1600-adc";
+        reg = <0x10070000 0x1000>;
+
+        clocks = <&cgu 28>;
+
+        interrupt-parent = <&intc>;
+        interrupts = <11>;
+
+        vref-supply = <&vcc_3v3>;
+
+        #io-channel-cells = <1>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 0017755f593b..4ab4ae67f788 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13176,6 +13176,11 @@ F:	include/linux/mfd/ingenic-tcu.h
 F:	sound/soc/codecs/jz47*
 F:	sound/soc/jz4740/
 
+INGENIC X1600 ADC DRIVER
+M:	Olivier Louvignes <olivier@mgcrea.io>
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/adc/ingenic,x1600-adc.yaml
+
 INJOINIC IP5xxx POWER BANK IC DRIVER
 M:	Samuel Holland <samuel@sholland.org>
 S:	Maintained
-- 
2.39.5