From: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
To: matti.vaittinen@fi.rohmeurope.com, mazziesaccount@gmail.com
Cc: Sebastian Reichel <sre@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Markus Laine <markus.laine@fi.rohmeurope.com>,
Mikko Mutanen <mikko.mutanen@fi.rohmeurope.com>
Subject: [PATCH v5 1/9] dt-bindings: battery: add new battery parameters
Date: Wed, 18 Mar 2020 13:47:30 +0200 [thread overview]
Message-ID: <cfbd305c5ad1f2d9ff50ea3bab1c91f785092a8d.1584468798.git.matti.vaittinen@fi.rohmeurope.com> (raw)
In-Reply-To: <cover.1584468798.git.matti.vaittinen@fi.rohmeurope.com>
Add:
- trickle-charge-current-microamp:
Some chargers have 3 charging stages. First one when battery is almost
empty is often called as trickle-charge. Last state when battery has been
"woken up" is usually called as fast-charge. In addition to this some
chargers have a 'middle state' which ROHM BD99954 data-sheet describes as
pre-charge. Some batteries can benefit from this 3-phase charging
[citation needed].
Introduce trickle-charge-current-microamp so that batteries can give
charging current limit for all three states.
- precharge-upper-limit-microvolt:
When battery voltage has reached certain limit we change from
trickle-charge to next charging state (pre-charge for BD99954). Allow
battery to specify this limit.
- re-charge-voltage-microvolt:
Allow giving a battery specific voltage limit for chargers which can
automatically re-start charging when battery has discharghed down to
this limit.
- over-voltage-threshold-microvolt
Allow specifying voltage threshold after which the battery is assumed to
be faulty.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Documentation/devicetree/bindings/power/supply/battery.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt
index 3049cf88bdcf..5e29595edd74 100644
--- a/Documentation/devicetree/bindings/power/supply/battery.txt
+++ b/Documentation/devicetree/bindings/power/supply/battery.txt
@@ -11,15 +11,21 @@ different type. This prevents unpredictable, potentially harmful,
behavior should a replacement that changes the battery type occur
without a corresponding update to the dtb.
+Please note that not all charger drivers respect all of the properties.
+
Required Properties:
- compatible: Must be "simple-battery"
Optional Properties:
+ - over-voltage-threshold-microvolt: battery over-voltage limit
+ - re-charge-voltage-microvolt: limit to automatically start charging again
- voltage-min-design-microvolt: drained battery voltage
- voltage-max-design-microvolt: fully charged battery voltage
- energy-full-design-microwatt-hours: battery design energy
- charge-full-design-microamp-hours: battery design capacity
+ - trickle-charge-current-microamp: current for trickle-charge phase
- precharge-current-microamp: current for pre-charge phase
+ - precharge-upper-limit-microvolt: limit when to change to constant charging
- charge-term-current-microamp: current for charge termination phase
- constant-charge-current-max-microamp: maximum constant input current
- constant-charge-voltage-max-microvolt: maximum constant input voltage
--
2.21.0
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
next prev parent reply other threads:[~2020-03-18 11:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-18 11:47 [PATCH v5 0/9] Support ROHM BD99954 charger IC Matti Vaittinen
2020-03-18 11:47 ` Matti Vaittinen [this message]
2020-03-18 11:49 ` [PATCH v5 2/9] dt_bindings: ROHM BD99954 Charger Matti Vaittinen
2020-03-20 22:38 ` Rob Herring
2020-03-18 11:50 ` [PATCH v5 3/9] drivers: base: add linear ranges helpers Matti Vaittinen
2020-03-18 11:51 ` [PATCH v5 4/9] power: supply: bd70528: rename linear_range to avoid collision Matti Vaittinen
2020-03-18 11:52 ` [PATCH v5 5/9] regulator: use linear_ranges helper Matti Vaittinen
2020-03-18 11:53 ` [PATCH v5 6/9] power: supply: bd70528: use linear ranges Matti Vaittinen
2020-03-18 11:53 ` [PATCH v5 7/9] power: supply: add battery parameters Matti Vaittinen
2020-03-18 11:54 ` [PATCH v5 8/9] power: supply: Support ROHM bd99954 charger Matti Vaittinen
2020-03-18 11:54 ` [PATCH v5 9/9] power: supply: Fix Kconfig help text indentiation Matti Vaittinen
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