1 Qualcomm's SPMI PMIC current ADC
2
3 QPNP PMIC current ADC (IADC) provides interface to clients to read current.
4 A 16 bit ADC is used for current measurements. IADC can measure the current
5 through an external resistor (channel 1) or internal (built-in) resistor
6 (channel 0). When using an external resistor it is to be described by
7 qcom,external-resistor-micro-ohms property.
8
9 IADC node:
10
11 - compatible:
12 Usage: required
13 Value type: <string>
14 Definition: Should contain "qcom,spmi-iadc".
15
16 - reg:
17 Usage: required
18 Value type: <prop-encoded-array>
19 Definition: IADC base address and length in the SPMI PMIC register map
20
21 - interrupts:
22 Usage: optional
23 Value type: <prop-encoded-array>
24 Definition: End of ADC conversion.
25
26 - qcom,external-resistor-micro-ohms:
27 Usage: optional
28 Value type: <u32>
29 Definition: Sense resister value in micro Ohm.
30 If not defined value of 10000 micro Ohms will be used.
31
32 Example:
33 /* IADC node */
34 pmic_iadc: iadc@3600 {
35 compatible = "qcom,spmi-iadc";
36 reg = <0x3600 0x100>;
37 interrupts = <0x0 0x36 0x0 IRQ_TYPE_EDGE_RISING>;
38 qcom,external-resistor-micro-ohms = <10000>;
39 #io-channel-cells = <1>;
40 };
41
42 /* IIO client node */
43 bat {
44 io-channels = <&pmic_iadc 0>;
45 io-channel-names = "iadc";
46 };
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