In order to preserve previous RTC charging behavior while allowing to add new charging configurations this series adds the dt property aux-voltage-chargeable as a uint enum. It supersedes the trickle-diode-disable flag. Then the ds1307 driver's charging infrastructure is generalized: - support charging on 'aux-voltage-chargeable = <1>' - keep the previous charge default per chip - make trickle-resistor-ohms optional for charging - apply DS13XX_TRICKLE_CHARGER_MAGIC only conditionally This preparatory work allows to enable Epson's RX8130 backup battery and make it chargeable when 'aux-voltage-chargeable = <1>' is given. I decided to create a new series for this as the patches of previous efforts changed drastically: - https://lore.kernel.org/linux-rtc/20190628002151.4925-1-marex@xxxxxxx/ - https://lore.kernel.org/linux-rtc/20190905130336.10651-1-marex@xxxxxxx/ - https://lore.kernel.org/linux-rtc/98fa7181-3ebe-d7c3-cfac-fee841c81e15@xxxxxxxxxxxxxx/T/ Regards, Bastian Bastian Krause (8): dt-bindings: rtc: let aux-voltage-chargeable supersede trickle-diode-disable dt-bindings: rtc: ds1307: let aux-voltage-chargeable supersede trickle-diode-disable dt-bindings: rtc: ds1307: add rx8130 aux-voltage-chargeable support rtc: ds1307: apply DS13XX_TRICKLE_CHARGER_MAGIC only conditionally rtc: ds1307: introduce requires_trickle_resistor per chip rtc: ds1307: store previous charge default per chip rtc: ds1307: consider aux-voltage-chargeable rtc: ds1307: enable rx8130's backup battery, make it chargeable optionally .../devicetree/bindings/rtc/rtc-ds1307.txt | 9 ++- .../devicetree/bindings/rtc/rtc.yaml | 10 ++++ drivers/rtc/rtc-ds1307.c | 58 +++++++++++++++++-- 3 files changed, 71 insertions(+), 6 deletions(-) -- 2.28.0
