bq769x2: Add support for configuring REG0 (pre-regulator) #86
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The technical reference says that one should no change voltage setting on REG 1 and REG2 if it is enabled. So the correct setting procedure seems to be:
- Ensure that REG1_EN and REG2_EN REG_0 are OFF.
- set the voltages and end REG{1,2}_EN bits as needed
- Optionally set REG0_EN.
Don't you think having both reg0_config field AND BIT(0) in enable_vregs is little bit confusing to ensure the correct sequence?
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It was not possible to enable the pre-regulator REG0, which is required in most cases when REG1 and REG2 are needed. In addition to that,
bq769x2_configure_voltage_regsdid not correctly update the actually configured regulators.Fixes #85