Devicetree binding documentation for Analog Devices MAX313XX RTCs Signed-off-by: Ibrahim Tilki <Ibrahim.Tilki@xxxxxxxxxx> Signed-off-by: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@xxxxxxxxxx> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- .../devicetree/bindings/rtc/adi,max313xx.yaml | 151 ++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/adi,max313xx.yaml diff --git a/Documentation/devicetree/bindings/rtc/adi,max313xx.yaml b/Documentation/devicetree/bindings/rtc/adi,max313xx.yaml new file mode 100644 index 000000000..7fa28d9d4 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/adi,max313xx.yaml @@ -0,0 +1,151 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2022 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rtc/adi,max313xx.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices MAX313XX series I2C RTCs + +maintainers: + - Ibrahim Tilki <Ibrahim.Tilki@xxxxxxxxxx> + - Zeynep Arslanbenzer <Zeynep.Arslanbenzer@xxxxxxxxxx> + +description: Analog Devices MAX313XX series I2C RTCs. + +properties: + compatible: + enum: + - adi,max31328 + - adi,max31329 + - adi,max31331 + - adi,max31334 + - adi,max31341 + - adi,max31342 + - adi,max31343 + + reg: + description: I2C address of the RTC + items: + - enum: [0x68, 0x69] + + interrupts: + minItems: 1 + maxItems: 2 + + interrupt-names: + description: | + Name of the interrupt pin of the RTC used for IRQ. Not required for + RTCs that only have single interrupt pin available. Some of the RTCs + share interrupt pins with clock input/output pins. + minItems: 1 + items: + - enum: [INTA, INTB] + - enum: [INTA, INTB] + + "#clock-cells": + description: | + RTC can be used as a clock source through its clock output pin when + supplied. + const: 0 + + clocks: + description: | + RTC uses this clock for clock input when supplied. Clock has to provide + one of these four frequencies: 1Hz, 50Hz, 60Hz or 32.768kHz. + maxItems: 1 + + trickle-diode-disable: true + + trickle-resistor-ohms: + description: Enables trickle charger with specified resistor value. + enum: [3000, 6000, 11000] + + wakeup-source: true + +additionalProperties: false + +allOf: + - $ref: rtc.yaml# + - if: + properties: + compatible: + contains: + enum: + - adi,max31328 + - adi,max31342 + + then: + properties: + trickle-diode-disable: false + trickle-resistor-ohms: false + + - if: + properties: + compatible: + contains: + enum: + - adi,max31328 + - adi,max31331 + - adi,max31334 + - adi,max31343 + + then: + properties: + clocks: false + + - if: + properties: + compatible: + contains: + enum: + - adi,max31341 + - adi,max31342 + + then: + properties: + reg: + items: + - const: 0x69 + + else: + properties: + reg: + items: + - const: 0x68 + +required: + - compatible + - reg + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + + rtc@68 { + reg = <0x68>; + compatible = "adi,max31329"; + clocks = <&clkin>; + interrupt-parent = <&gpio>; + interrupts = <26 IRQ_TYPE_EDGE_FALLING>; + interrupt-names = "INTB"; + }; + }; + - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + + rtc@68 { + reg = <0x68>; + compatible = "adi,max31331"; + #clock-cells = <0>; + interrupt-parent = <&gpio>; + interrupts = <25 IRQ_TYPE_EDGE_FALLING>, <26 IRQ_TYPE_EDGE_FALLING>; + interrupt-names = "INTA", "INTB"; + }; + }; -- 2.25.1
