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Subject[PATCH v3] dt-bindings: power/supply: Add ltc4162-l-charger
Date
Add support for the LTC4162-L Li-Ion battery charger. The driver allows
reading back telemetry and to set some charging options like the input
current limit.

This adds the devicetree bindings.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
---
v2: Use microohms, add lltc,cell-count
v3: Fix example dts to match description
resent, previous patch mail bounced

.../bindings/power/supply/ltc4162-l.yaml | 69 +++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml

diff --git a/Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml b/Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml
new file mode 100644
index 000000000000..c564019783ad
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (C) 2020 Topic Embedded Products
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/power/supply/ltc4162-l.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Linear Technology (Analog Devices) LTC4162-L Charger
+
+maintainers:
+ - Mike Looijmans <mike.looijmans@topic.nl>
+
+description: |
+ The LTC ® 4162-L is an advanced monolithic synchronous step-down switching
+ battery charger and PowerPath (TM) manager that seamlessly manages power
+ distribution between input sources such as wall adapters, backplanes, solar
+ panels, etc., and a rechargeable Lithium-Ion/Polymer battery.
+
+ Specifications about the charger can be found at:
+ https://www.analog.com/en/products/ltc4162-s.html
+
+properties:
+ compatible:
+ enum:
+ - lltc,ltc4162-l
+
+ reg:
+ maxItems: 1
+ description: I2C address of the charger.
+
+ lltc,rsnsb-micro-ohms:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Battery sense resistor in microohm.
+ minimum: 1000
+
+ lltc,rsnsi-micro-ohms:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Input current sense resistor in microohm.
+ minimum: 1000
+
+ lltc,cell-count:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Number of battery cells. If not provided, will be obtained from the chip
+ once the external power is applied. Omit this when the number of cells
+ is somewhat dynamic. Without it, several measurements will return 0 until
+ the charger is connected to an external supply.
+
+required:
+ - compatible
+ - reg
+ - lltc,rsnsb
+ - lltc,rsnsi
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ charger: battery-charger@68 {
+ compatible = "lltc,ltc4162-l";
+ reg = <0x68>;
+ lltc,rsnsb-micro-ohms = <10000>;
+ lltc,rsnsi-micro-ohms = <16000>;
+ lltc,cell-count = <2>;
+ };
+ };
--
2.17.1
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