From: Frieder Schrempf <frieder@fris.de>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org
Cc: Frieder Schrempf <frieder.schrempf@kontron.de>,
Alessandro Zummo <a.zummo@towertech.it>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>
Subject: [PATCH 0/7] Enable backup switch mode on RTCs via devicetree
Date: Wed, 1 Feb 2023 15:34:22 +0100 [thread overview]
Message-ID: <20230201143431.863784-1-frieder@fris.de> (raw)
From: Frieder Schrempf <frieder.schrempf@kontron.de>
Some RTC devices like the RV3028 have BSM disabled as factory default.
This makes the RTC quite useless if it is expected to preserve the
time on hardware that has a battery-buffered supply for the RTC.
Let boards that have a buffered supply for the RTC force the BSM to the
desired value via devicetree by setting the 'backup-switch-mode' property.
That way the RTC on the boards work as one would expect them to do without
any per-board intervention through userspace tools to enable BSM.
Frieder Schrempf (7):
dt-bindings: rtc: Move RV3028 to separate binding file
dt-bindings: rtc: Add backup-switch-mode property
dt-bindings: rtc: microcrystal,rv3032: Add backup-switch-mode property
rtc: Move BSM defines to separate header for DT usage
rtc: class: Support setting backup switch mode from devicetree
arm64: dts: imx8mm-kontron: Remove useless trickle-diode-disable from
RTC node
arm64: dts: imx8mm-kontron: Enable backup switch mode for RTC on OSM-S
module
.../bindings/rtc/microcrystal,rv3028.yaml | 60 +++++++++++++++++++
.../devicetree/bindings/rtc/rtc.yaml | 7 +++
.../devicetree/bindings/rtc/trivial-rtc.yaml | 2 -
.../dts/freescale/imx8mm-kontron-osm-s.dtsi | 3 +-
drivers/rtc/class.c | 14 +++++
include/dt-bindings/rtc/rtc.h | 11 ++++
include/uapi/linux/rtc.h | 6 +-
7 files changed, 95 insertions(+), 8 deletions(-)
create mode 100644 Documentation/devicetree/bindings/rtc/microcrystal,rv3028.yaml
create mode 100644 include/dt-bindings/rtc/rtc.h
--
2.39.1
WARNING: multiple messages have this Message-ID (diff)
From: Frieder Schrempf <frieder@fris.de>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org
Cc: Frieder Schrempf <frieder.schrempf@kontron.de>,
Alessandro Zummo <a.zummo@towertech.it>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>
Subject: [PATCH 0/7] Enable backup switch mode on RTCs via devicetree
Date: Wed, 1 Feb 2023 15:34:22 +0100 [thread overview]
Message-ID: <20230201143431.863784-1-frieder@fris.de> (raw)
From: Frieder Schrempf <frieder.schrempf@kontron.de>
Some RTC devices like the RV3028 have BSM disabled as factory default.
This makes the RTC quite useless if it is expected to preserve the
time on hardware that has a battery-buffered supply for the RTC.
Let boards that have a buffered supply for the RTC force the BSM to the
desired value via devicetree by setting the 'backup-switch-mode' property.
That way the RTC on the boards work as one would expect them to do without
any per-board intervention through userspace tools to enable BSM.
Frieder Schrempf (7):
dt-bindings: rtc: Move RV3028 to separate binding file
dt-bindings: rtc: Add backup-switch-mode property
dt-bindings: rtc: microcrystal,rv3032: Add backup-switch-mode property
rtc: Move BSM defines to separate header for DT usage
rtc: class: Support setting backup switch mode from devicetree
arm64: dts: imx8mm-kontron: Remove useless trickle-diode-disable from
RTC node
arm64: dts: imx8mm-kontron: Enable backup switch mode for RTC on OSM-S
module
.../bindings/rtc/microcrystal,rv3028.yaml | 60 +++++++++++++++++++
.../devicetree/bindings/rtc/rtc.yaml | 7 +++
.../devicetree/bindings/rtc/trivial-rtc.yaml | 2 -
.../dts/freescale/imx8mm-kontron-osm-s.dtsi | 3 +-
drivers/rtc/class.c | 14 +++++
include/dt-bindings/rtc/rtc.h | 11 ++++
include/uapi/linux/rtc.h | 6 +-
7 files changed, 95 insertions(+), 8 deletions(-)
create mode 100644 Documentation/devicetree/bindings/rtc/microcrystal,rv3028.yaml
create mode 100644 include/dt-bindings/rtc/rtc.h
--
2.39.1
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next reply other threads:[~2023-02-01 14:43 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 14:34 Frieder Schrempf [this message]
2023-02-01 14:34 ` [PATCH 0/7] Enable backup switch mode on RTCs via devicetree Frieder Schrempf
2023-02-01 14:34 ` [PATCH 1/7] dt-bindings: rtc: Move RV3028 to separate binding file Frieder Schrempf
2023-02-01 20:10 ` Rob Herring
2023-02-02 9:10 ` Krzysztof Kozlowski
2023-02-02 10:17 ` Frieder Schrempf
2023-02-01 14:34 ` [PATCH 2/7] dt-bindings: rtc: Add backup-switch-mode property Frieder Schrempf
2023-02-01 14:34 ` [PATCH 3/7] dt-bindings: rtc: microcrystal,rv3032: " Frieder Schrempf
2023-02-01 14:34 ` [PATCH 4/7] rtc: Move BSM defines to separate header for DT usage Frieder Schrempf
2023-02-02 23:22 ` kernel test robot
2023-02-01 14:34 ` [PATCH 5/7] rtc: class: Support setting backup switch mode from devicetree Frieder Schrempf
2023-02-01 14:34 ` [PATCH 6/7] arm64: dts: imx8mm-kontron: Remove useless trickle-diode-disable from RTC node Frieder Schrempf
2023-02-01 14:34 ` Frieder Schrempf
2023-02-01 14:34 ` [PATCH 7/7] arm64: dts: imx8mm-kontron: Enable backup switch mode for RTC on OSM-S module Frieder Schrempf
2023-02-01 14:34 ` Frieder Schrempf
2023-02-01 16:15 ` [PATCH 0/7] Enable backup switch mode on RTCs via devicetree Alexandre Belloni
2023-02-01 16:15 ` Alexandre Belloni
2023-02-01 16:26 ` Frieder Schrempf
2023-02-01 16:26 ` Frieder Schrempf
2023-02-13 9:18 ` Frieder Schrempf
2023-02-13 9:18 ` Frieder Schrempf
2023-03-06 13:27 ` Frieder Schrempf
2023-03-06 13:27 ` Frieder Schrempf
2023-03-22 13:14 ` Frieder Schrempf
2023-03-22 13:14 ` Frieder Schrempf
2023-03-22 22:19 ` Alexandre Belloni
2023-03-22 22:19 ` Alexandre Belloni
2023-03-28 7:10 ` Frieder Schrempf
2023-03-28 7:10 ` Frieder Schrempf
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