1 ltc2990: Linear Technology LTC2990 power monit 1 ltc2990: Linear Technology LTC2990 power monitor
2 2
3 Required properties: 3 Required properties:
4 - compatible: Must be "lltc,ltc2990" 4 - compatible: Must be "lltc,ltc2990"
5 - reg: I2C slave address 5 - reg: I2C slave address
6 - lltc,meas-mode: 6 - lltc,meas-mode:
7 An array of two integers for configuri 7 An array of two integers for configuring the chip measurement mode.
8 8
9 The first integer defines the bits 2.. 9 The first integer defines the bits 2..0 in the control register. In all
10 cases the internal temperature and sup 10 cases the internal temperature and supply voltage are measured. In
11 addition the following input measureme 11 addition the following input measurements are enabled per mode:
12 12
13 0: V1, V2, TR2 13 0: V1, V2, TR2
14 1: V1-V2, TR2 14 1: V1-V2, TR2
15 2: V1-V2, V3, V4 15 2: V1-V2, V3, V4
16 3: TR1, V3, V4 16 3: TR1, V3, V4
17 4: TR1, V3-V4 17 4: TR1, V3-V4
18 5: TR1, TR2 18 5: TR1, TR2
19 6: V1-V2, V3-V4 19 6: V1-V2, V3-V4
20 7: V1, V2, V3, V4 20 7: V1, V2, V3, V4
21 21
22 The second integer defines the bits 4. 22 The second integer defines the bits 4..3 in the control register. This
23 allows a subset of the measurements to 23 allows a subset of the measurements to be enabled:
24 24
25 0: Internal temperature and su 25 0: Internal temperature and supply voltage only
26 1: TR1, V1 or V1-V2 only per m 26 1: TR1, V1 or V1-V2 only per mode
27 2: TR2, V3 or V3-V4 only per m 27 2: TR2, V3 or V3-V4 only per mode
28 3: All measurements per mode 28 3: All measurements per mode
29 29
30 Example: 30 Example:
31 31
32 ltc2990@4c { 32 ltc2990@4c {
33 compatible = "lltc,ltc2990"; 33 compatible = "lltc,ltc2990";
34 reg = <0x4c>; 34 reg = <0x4c>;
35 lltc,meas-mode = <7 3>; /* V1, V2, V3, 35 lltc,meas-mode = <7 3>; /* V1, V2, V3, V4 */
36 }; 36 };
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