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- Qualcomm's SPMI PMIC current ADC
- QPNP PMIC current ADC (IADC) provides interface to clients to read current.
- A 16 bit ADC is used for current measurements. IADC can measure the current
- through an external resistor (channel 1) or internal (built-in) resistor
- (channel 0). When using an external resistor it is to be described by
- qcom,external-resistor-micro-ohms property.
- IADC node:
- - compatible:
- Usage: required
- Value type: <string>
- Definition: Should contain "qcom,spmi-iadc".
- - reg:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: IADC base address and length in the SPMI PMIC register map
- - interrupts:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: End of ADC conversion.
- - qcom,external-resistor-micro-ohms:
- Usage: optional
- Value type: <u32>
- Definition: Sense resister value in micro Ohm.
- If not defined value of 10000 micro Ohms will be used.
- Example:
- /* IADC node */
- pmic_iadc: iadc@3600 {
- compatible = "qcom,spmi-iadc";
- reg = <0x3600 0x100>;
- interrupts = <0x0 0x36 0x0 IRQ_TYPE_EDGE_RISING>;
- qcom,external-resistor-micro-ohms = <10000>;
- #io-channel-cells = <1>;
- };
- /* IIO client node */
- bat {
- io-channels = <&pmic_iadc 0>;
- io-channel-names = "iadc";
- };
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