[U-Boot] [PATCH v2 0/2] Update RV3029 driver to DM and add DM-backed bootcount support

[Philipp Tomsich]

On one of our application-specific carrier boards, a MicroCrystal
RV3029 acts as an off-module battery-backed RTC for the RK3399-Q7.
The RV3029 is intended both to provide RTC services (to Linux) and
to store the bootcount in its battery-backed SRAM section.

To support this use-case, this series adds the following:
 * replaces the existing RV3029 driver by a DM-based one (note that the
   existing driver appears unused and didn't even have a Kconfig entry)
   that closely mirrors its incarnation in Linux 4.17
 * adds a bootcount-method interfacing back into DM devices (implementing
   support for the RTC uclass as of now).


Changes in v2:
- changed to provide a UCLASS-based implementation, as requested by
  SJG in his earlier review
- split off the RV3029 driver into a separate series

Philipp Tomsich (2):
  bootcount: add uclass for bootcount
  bootcount: add a DM RTC backing store for bootcount

 doc/device-tree-bindings/chosen.txt  | 30 ++++++++++++
 drivers/bootcount/Kconfig            | 28 +++++++++++
 drivers/bootcount/Makefile           |  3 ++
 drivers/bootcount/bootcount-uclass.c | 93 ++++++++++++++++++++++++++++++++++++
 drivers/bootcount/rtc.c              | 89 ++++++++++++++++++++++++++++++++++
 include/bootcount.h                  | 48 +++++++++++++++++++
 include/dm/uclass-id.h               |  1 +
 7 files changed, 292 insertions(+)
 create mode 100644 drivers/bootcount/bootcount-uclass.c
 create mode 100644 drivers/bootcount/rtc.c

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2.1.4