power: supply: max17040: Config alert SOC low level threshold from FDT
For configuration of fuel gauge alert for a low level state of charge interrupt we add a function to config level threshold and a device tree binding property to set it in flatned device tree node. Now we can use "maxim,alert-low-soc-level" property with the values from 1% up to 32% to configure alert interrupt threshold. Signed-off-by: Matheus Castello <matheus@castello.eng.br> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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