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