dt-bindings: iio: adc: mediatek,mt6359-auxadc: add mt6323 PMIC AUXADC

The MediaTek mt6323 PMIC includes an AUXADC used for battery voltage,
temperature, and other internal measurements. The IP block is not
register-compatible with mt6359.

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

Also change the description to 'MT6350 series and similar' because
the binding already includes more than mt635x series PMICs.

Finally, add the MAINTAINERS entry for the header with ADC constants.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Roman Vivchar <rva333@protonmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Documentation/devicetree/bindings/iio/adc/mediatek,mt6359-auxadc.yaml

@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/iio/adc/mediatek,mt6359-auxadc.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: MediaTek MT6350 series PMIC AUXADC
+title: MediaTek MT6350 series and similar PMIC AUXADC
 
 maintainers:
   - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
@@ -20,6 +20,7 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - mediatek,mt6323-auxadc
           - mediatek,mt6357-auxadc
           - mediatek,mt6358-auxadc
           - mediatek,mt6359-auxadc

MAINTAINERS

@@ -16564,6 +16564,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/mmc/mtk-sd.yaml
 F:	drivers/mmc/host/mtk-sd.c
 
+MEDIATEK MT6323 PMIC AUXADC DRIVER
+M:	Roman Vivchar <rva333@protonmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	include/dt-bindings/iio/adc/mediatek,mt6323-auxadc.h
+
 MEDIATEK MT6735 CLOCK & RESET DRIVERS
 M:	Yassine Oudjana <y.oudjana@protonmail.com>
 L:	linux-clk@vger.kernel.org

include/dt-bindings/iio/adc/mediatek,mt6323-auxadc.h

@@ -0,0 +1,24 @@
+/* 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
+#define MT6323_AUXADC_AUDIO0		9
+#define MT6323_AUXADC_AUDIO1		10
+#define MT6323_AUXADC_AUDIO2		11
+#define MT6323_AUXADC_AUDIO3		12
+#define MT6323_AUXADC_AUDIO4		13
+#define MT6323_AUXADC_AUDIO5		14
+#define MT6323_AUXADC_AUDIO6		15
+#define MT6323_AUXADC_AUDIO7		16
+
+#endif