| binding for LTC2941, LTC2942, LTC2943 and LTC2944 battery gauges |
| |
| All chips measure battery capacity. |
| The LTC2942 is pin compatible with the LTC2941, it adds voltage and |
| temperature monitoring, and is runtime detected. LTC2943 and LTC2944 |
| is software compatible, uses a slightly different conversion formula |
| for the charge counter and adds voltage, current and temperature monitoring. |
| |
| Required properties: |
| - compatible: Should contain "lltc,ltc2941", "lltc,ltc2942", "lltc,ltc2943" |
| or "lltc,ltc2944" 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 = "lltc,ltc2943"; |
| reg = <0x64>; |
| lltc,resistor-sense = <15>; |
| lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */ |
| }; |
