Add support for LT8491 #2639
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| # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) | ||
| %YAML 1.2 | ||
| --- | ||
| $id: http://devicetree.org/schemas/power/supply/adi,lt8491.yaml# | ||
| $schema: http://devicetree.org/meta-schemas/core.yaml# | ||
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| title: Linear Technology (Analog Devices) LT8491 Battery Charger | ||
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| maintainers: | ||
| - John Erasmus Mari Geronimo <[email protected]> | ||
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| description: | | ||
| The LT8491 is a buck-boost switching regulator battery charger that implements | ||
| a constant-current constant-voltage (CCCV) charging profile used for most | ||
| battery types, including sealed lead-acid (SLA), flooded, gel and lithium-ion. | ||
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| Specifications about the charger can be found at: | ||
| https://www.analog.com/en/products/lt8491.html | ||
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| properties: | ||
| compatible: | ||
| enum: | ||
| - adi,lt8491 | ||
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| reg: | ||
| maxItems: 1 | ||
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| adi,rsense1-micro-ohms: | ||
| description: Resistance value of RSENSE1 in micro ohms. | ||
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| adi,rimon-out-ohms: | ||
| description: Resistance value of RIMON_OUT in ohms. | ||
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| adi,rsense2-micro-ohms: | ||
| description: Resistance value of RSENSE2 in micro ohms. | ||
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| adi,rdaco-ohms: | ||
| description: Resistance value of RDACO1 + RDACO2 in ohms. | ||
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| adi,rfbout1-ohms: | ||
| description: Resistance value of RFBOUT1 in ohms. | ||
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| adi,rfbout2-ohms: | ||
| description: Resistance value of RFBOUT2 in ohms. | ||
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| adi,rdaci-ohms: | ||
| description: Resistance value of RDACI1 + RDACI2 in ohms. | ||
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| adi,rfbin2-ohms: | ||
| description: Resistance value of RFBIN2 in ohms. | ||
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| adi,rfbin1-ohms: | ||
| description: Resistance value of RFBIN1 in ohms. | ||
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| required: | ||
| - compatible | ||
| - reg | ||
| - adi,rsense1-micro-ohms | ||
| - adi,rimon-out-ohms | ||
| - adi,rsense2-micro-ohms | ||
| - adi,rdaco-ohms | ||
| - adi,rfbout1-ohms | ||
| - adi,rfbout2-ohms | ||
| - adi,rdaci-ohms | ||
| - adi,rfbin2-ohms | ||
| - adi,rfbin1-ohms | ||
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There was a problem hiding this comment. Just to make sure. Are all these properties really mandatory? There was a problem hiding this comment. Yes. These are needed for the measurements of telemetry data such as temperature, voltage, current, and power. |
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| additionalProperties: false | ||
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| examples: | ||
| - | | ||
| i2c { | ||
| #address-cells = <1>; | ||
| #size-cells = <0>; | ||
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| battery-charger@10 { | ||
| compatible = "adi,lt8491"; | ||
| reg = <0x10>; | ||
| adi,rsense1-micro-ohms = <5000>; | ||
| adi,rimon-out-ohms = <124000>; | ||
| adi,rsense2-micro-ohms = <3000>; | ||
| adi,rdaco-ohms = <64900>; | ||
| adi,rfbout1-ohms = <113000>; | ||
| adi,rfbout2-ohms = <10000>; | ||
| adi,rdaci-ohms = <7000>; | ||
| adi,rfbin2-ohms = <3480>; | ||
| adi,rfbin1-ohms = <102000>; | ||
| }; | ||
| }; | ||
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Are there any constrains for the resistor values (or default values)?
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None.
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These are the actual resistor values used in the circuit/PCB.
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And do you need all of them for the driver to work? Very odd that you can just arbitrary values in these things. At the very least, 0 should not be possible...