zephyr/boards/google/twinkie_v2
Jordan Yates 4361c96c48 adc: current_sense_amplifier: resistance in milli-ohms
Change the unit of the sense resistor in the devicetree binding from
micro-ohms to milli-ohms. This is done for three reasons.

Firstly, the maximum value resistor that can currently be represented
is 4.2 kOhms, due to the limitation of devicetree properties to 32 bits.

Secondly, storing the resistance at such a high resolution makes
overflows much more likely when the desired output unit is micro-amps,
not milli-amps.

Finally, micro-ohms, are an unnecessarily precise unit for the purpose
of these calculations, and a resolution that is not realistic to
achieve. The high resistor resolution results in large divisors that
reduce the resolution of outputs. Unlike resistors characterised down to
the micro-ohm, devices wanting to measure micro-amps are actually
realistic.

Signed-off-by: Jordan Yates <jordan@embeint.com>
2024-10-14 13:05:07 +02:00
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doc
Kconfig.google_twinkie_v2
board.cmake
board.yml
google_twinkie_v2.dts adc: current_sense_amplifier: resistance in milli-ohms 2024-10-14 13:05:07 +02:00
google_twinkie_v2.yaml
google_twinkie_v2_defconfig