linux-kernel - [PATCH v3 0/8] rtc: isl12022: battery backup voltage and clock support

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Message-Id: <20230615105826.411953-1-linux@rasmusvillemoes.dk>
Date:   Thu, 15 Jun 2023 12:58:18 +0200
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-rtc@...r.kernel.org,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/8] rtc: isl12022: battery backup voltage and clock support

The current handling of the low-battery bits in the status register is
wrong. The first six patches fix that and implement proper support for
RTC_VL_READ.

The last two patches allow describing the isl12022 as a clock
provider, for now just as a fixed 32kHz clock. They are also
tangentially related to the backup battery, in that when the isl12022
is not used as a clock source, one can save some power consumption in
battery mode by setting the FOx bits to 0.

v3 changes:

Patch 2: move the allOf block further down, add R-b [Krzysztof]

Patch 3: change to a single property with two values [Krzysztof]

Patch 4: adjust implementation accordingly

Patch 5: move initialization of 'user' variable inside switch case,
use 'if (ret)' instead of 'if (ret < 0)' for consistency within the
driver [Andy]

Patch 7: semantically identical to v2, just context changes due to
changes in 2/8 and 3/8

Patch 8: only do the clock registration when CONFIG_COMMON_CLK [kernel
test robot]

v2: https://lore.kernel.org/lkml/20230613130011.305589-1-linux@rasmusvillemoes.dk/
v1: https://lore.kernel.org/lkml/20230612113059.247275-1-linux@rasmusvillemoes.dk/

Rasmus Villemoes (8):
  rtc: isl12022: remove wrong warning for low battery level
  dt-bindings: rtc: Move isil,isl12022 from trivial-rtc.yaml into own
    schema file
  dt-bindings: rtc: isl12022: add bindings for battery alarm trip levels
  rtc: isl12022: add support for trip level DT binding
  rtc: isl12022: implement RTC_VL_READ ioctl
  rtc: isl12022: trigger battery level detection during probe
  dt-bindings: rtc: isl12022: add #clock-cells property
  rtc: isl12022: implement support for the #clock-cells DT property

 .../bindings/rtc/intersil,isl12022.yaml       |  64 +++++++++
 .../devicetree/bindings/rtc/trivial-rtc.yaml  |   2 -
 drivers/rtc/rtc-isl12022.c                    | 126 +++++++++++++++++-
 3 files changed, 184 insertions(+), 8 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/rtc/intersil,isl12022.yaml

-- 
2.37.2