| 123456789101112131415161718192021222324252627 |
- binding for LTC2941 and LTC2943 battery gauges
- Both the LTC2941 and LTC2943 measure battery capacity.
- The LTC2943 is compatible with the LTC2941, it adds voltage and
- temperature monitoring, and uses a slightly different conversion
- formula for the charge counter.
- Required properties:
- - compatible: Should contain "ltc2941" or "ltc2943" which also indicates the
- type of I2C chip attached.
- - reg: The 7-bit I2C address.
- - lltc,resistor-sense: The sense resistor value in milli-ohms. Can be a 32-bit
- negative value when the battery has been connected to the wrong end of the
- resistor.
- - lltc,prescaler-exponent: The prescaler exponent as explained in the datasheet.
- This determines the range and accuracy of the gauge. The value is programmed
- into the chip only if it differs from the current setting. The setting is
- lost when the battery is disconnected.
- Example from the Topic Miami Florida board:
- fuelgauge: ltc2943@64 {
- compatible = "ltc2943";
- reg = <0x64>;
- lltc,resistor-sense = <15>;
- lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */
- };
|
