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";
|
};
|
