[PATCH v1 1/8] dt-bindings: mfd: Add bindings for TI TAC5x1x MFD core

[Niranjan H Y <niranjan.hy@ti.com>]

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Add device tree bindings for the Texas Instruments TAC5x1x family of
audio codecs with integrated GPIO controller, describing the MFD core
device interface, power supplies, and clock configuration.

Signed-off-by: Niranjan H Y <niranjan.hy@ti.com>
---
 .../devicetree/bindings/mfd/ti,tac5x1x.yaml   | 247 ++++++++++++++++++
 1 file changed, 247 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,tac5x1x.yaml

diff --git a/Documentation/devicetree/bindings/mfd/ti,tac5x1x.yaml b/Documentation/devicetree/bindings/mfd/ti,tac5x1x.yaml
new file mode 100644
index 000000000000..3d7943c0411f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,tac5x1x.yaml
@@ -0,0 +1,247 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,tac5x1x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TAC5x1x Multi-Function Audio Device
+
+maintainers:
+  - Niranjan H Y <niranjan.hy@ti.com>
+
+description: |
+  TAC5x1x family of low-power, high-performance audio codecs with integrated
+  GPIO controller and diagnostic capabilities.
+
+  This is the parent binding. Child nodes are bound by these bindings:
+  - Pin controller: Documentation/devicetree/bindings/pinctrl/ti,tac5x1x-pinctrl.yaml
+  - Audio codec: Documentation/devicetree/bindings/sound/ti,tac5x1x.yaml
+
+  Hardware features:
+  - Audio ADC/DAC with configurable impedance and voltage references
+  - 4-pin GPIO controller with alternate functions (PDM, IRQ)
+  - Analog voltage and current monitoring circuits
+  - Diagnostic fault detection with interrupt generation
+
+  Device datasheets can be found at:
+    TAA5212:    https://www.ti.com/lit/ds/symlink/taa5212.pdf
+    TAA5412-Q1: https://www.ti.com/lit/ds/symlink/taa5412-q1.pdf
+    TAC5111:    https://www.ti.com/lit/ds/symlink/tac5111.pdf
+    TAC5112:    https://www.ti.com/lit/ds/symlink/tac5112.pdf
+    TAC5211:    https://www.ti.com/lit/ds/symlink/tac5211.pdf
+    TAC5212:    https://www.ti.com/lit/ds/symlink/tac5212.pdf
+    TAC5301:    https://www.ti.com/lit/ds/symlink/tac5301-q1.pdf
+    TAC5311-Q1: https://www.ti.com/lit/ds/symlink/tac5311-q1.pdf
+    TAC5312-Q1: https://www.ti.com/lit/ds/symlink/tac5312-q1.pdf
+    TAC5411-Q1: https://www.ti.com/lit/ds/symlink/tac5411-q1.pdf
+    TAC5412-Q1: https://www.ti.com/lit/ds/symlink/tac5412-q1.pdf
+    TAD5112:    https://www.ti.com/lit/ds/symlink/tad5112.pdf
+    TAD5212:    https://www.ti.com/lit/ds/symlink/tad5212.pdf
+
+properties:
+  compatible:
+    enum:
+      - ti,taa5212
+      - ti,taa5412
+      - ti,tac5111
+      - ti,tac5112
+      - ti,tac5211
+      - ti,tac5212
+      - ti,tac5301
+      - ti,tac5311
+      - ti,tac5312
+      - ti,tac5411
+      - ti,tac5412
+      - ti,tad5112
+      - ti,tad5212
+
+  reg:
+    maxItems: 1
+    description: I2C slave address
+
+  reset-gpios:
+    maxItems: 1
+    description: Hardware reset control pin (active low)
+
+  interrupts:
+    maxItems: 1
+    description: |
+      Interrupt from device diagnostic circuits to host processor.
+      Generated on voltage/current fault conditions and other diagnostic events.
+
+  clocks:
+    maxItems: 1
+    description: Master clock input (MCLK)
+
+  clock-names:
+    items:
+      - const: mclk
+
+  avdd-supply:
+    description: |
+      Analog supply voltage input (AVDD pin).
+      Typical voltages: 1.8V, 3.0V, 3.3V, 5.0V
+
+  iovdd-supply:
+    description: |
+      Digital I/O supply voltage input (IOVDD pin).
+      Typical voltages: 1.8V, 3.3V
+
+  ti,vref-voltage:
+    description: |
+      Internal voltage reference setting in microvolts.
+
+      Supported values:
+      - 1375000: VREF = 1.375V
+      - 2500000: VREF = 2.5V
+      - 2750000: VREF = 2.75V
+
+      Constraint: Selected VREF must be lower than AVDD supply voltage.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1375000, 2500000, 2750000]
+    default: 2500000
+
+  ti,micbias-voltage:
+    description: |
+      Microphone bias output voltage in microvolts.
+
+      Configuration options:
+      - VREF voltage: Set to same value as ti,vref-voltage
+      - 0.5 × VREF: Set to half of ti,vref-voltage value
+      - AVDD voltage: Set to AVDD supply voltage value
+
+      Note: When set to AVDD voltage, hardware automatically overrides
+      VREF setting to 2.75V regardless of ti,vref-voltage property.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 687500
+    maximum: 3300000
+
+  ti,adc1-impedance:
+    description: |
+      ADC Channel 1 input impedance in Ohms.
+      Supported impedance values:
+      - 5000: 5k input impedance
+      - 10000: 10k input impedance
+      - 40000: 40k input impedance
+      Available only for TAC5111, TAC5211, TAC5212, and TAA5212 variants.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [5000, 10000, 40000]
+    default: 10000
+
+  ti,adc2-impedance:
+    description: |
+      ADC Channel 2 input impedance in Ohms.
+      Supported impedance values:
+      - 5000: 5k input impedance
+      - 10000: 10k input impedance
+      - 40000: 40k input impedance
+      Available on stereo variants only (TAA5212, TAC5212).
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [5000, 10000, 40000]
+    default: 10000
+
+  ti,out2x-vcom-cfg:
+    description: |
+      Channel OUT2x VCOM reference voltage selection.
+
+      Configuration options:
+      - 0: VCOM = 0.6 × VREF
+      - 1: VCOM = AVDD / 2
+
+      Available on devices with stereo DAC output.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+
+  ti,gpa-threshold:
+    description: |
+      General Purpose Analog voltage monitoring thresholds in millivolts.
+      Format: [low_threshold_mv, high_threshold_mv]
+
+      Monitoring range: 0mV to 6000mV, Resolution: ~24mV per step
+      Default thresholds: 200mV (low), 2600mV (high)
+
+      Generates interrupt on voltage fault conditions.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+    items:
+      minimum: 200
+      maximum: 6000
+    default: [200, 2600]
+
+  ti,in-ch-en:
+    description: |
+      Enable input channel diagnostic monitoring circuits.
+
+      When enabled (1), activates hardware monitoring for:
+      - Input channel fault detection
+      - Micbias current monitoring (if ti,micbias-threshold configured)
+      - Input overvoltage detection
+
+      Available on: TAC5301, TAC5311, TAC5312, TAC5411, TAC5412, TAA5412
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+
+  ti,out-ch-en:
+    description: |
+      Enable output channel diagnostic monitoring circuits.
+
+      When enabled (1), activates hardware monitoring for:
+      - Output channel fault detection
+      - Driver fault monitoring
+      - Short circuit detection
+
+      Available on: TAC5301, TAC5311, TAC5312, TAC5411, TAC5412, TAA5412
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+
+  ti,incl-se-inm:
+    description: |
+      Include INxM pins in single-ended input diagnostic scan.
+
+      When enabled (1), includes negative input pins (INxM) in diagnostic
+      monitoring for single-ended input configurations.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+
+  ti,incl-ac-coup:
+    description: |
+      Include AC-coupled input channels in diagnostic scan.
+
+      When enabled (1), includes AC-coupled input channels in the
+      diagnostic monitoring system.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+
+  ti,micbias-threshold:
+    description: |
+      Microphone bias current monitoring thresholds in microamps.
+      Format: [low_threshold_ua, high_threshold_ua]
+
+      Current monitoring range: 100uA to 33000uA, Resolution: ~132uA per step
+      Default thresholds: 2600uA (low), 18000uA (high)
+
+      Hardware monitors actual current flow through MICBIAS pin.
+      Generates interrupts on fault conditions when ti,in-ch-en = <1>.
+
+      Available on: TAC5301, TAC5311, TAC5312, TAC5411, TAC5412, TAA5412
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+    items:
+      minimum: 100
+      maximum: 33000
+    default: [2600, 18000]
+
+required:
+  - compatible
+  - reg
+  - avdd-supply
+  - iovdd-supply
+
+unevaluatedProperties: false
-- 
2.34.1