| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/rtc/abracon,abx80x.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Abracon ABX80X I2C ultra low power RTC/Alarm chip |
| 8 | |
| 9 | maintainers: |
| 10 | - linux-rtc@vger.kernel.org |
| 11 | |
| 12 | properties: |
| 13 | compatible: |
| 14 | description: |
| 15 | The wildcard 'abracon,abx80x' may be used to support a mix |
| 16 | of different abracon rtc`s. In this case the driver |
| 17 | must perform auto-detection from ID register. |
| 18 | enum: |
| 19 | - abracon,abx80x |
| 20 | - abracon,ab0801 |
| 21 | - abracon,ab0803 |
| 22 | - abracon,ab0804 |
| 23 | - abracon,ab0805 |
| 24 | - abracon,ab1801 |
| 25 | - abracon,ab1803 |
| 26 | - abracon,ab1804 |
| 27 | - abracon,ab1805 |
| 28 | - microcrystal,rv1805 |
| 29 | |
| 30 | reg: |
| 31 | maxItems: 1 |
| 32 | |
| 33 | interrupts: |
| 34 | maxItems: 1 |
| 35 | |
| 36 | abracon,tc-diode: |
| 37 | description: |
| 38 | Trickle-charge diode type. |
| 39 | Required to enable charging backup battery. |
| 40 | |
| 41 | Supported are 'standard' diodes with a 0.6V drop |
| 42 | and 'schottky' diodes with a 0.3V drop. |
| 43 | $ref: /schemas/types.yaml#/definitions/string |
| 44 | enum: |
| 45 | - standard |
| 46 | - schottky |
| 47 | |
| 48 | abracon,tc-resistor: |
| 49 | description: |
| 50 | Trickle-charge resistor value in kOhm. |
| 51 | Required to enable charging backup battery. |
| 52 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 53 | enum: [0, 3, 6, 11] |
| 54 | |
| 55 | dependentRequired: |
| 56 | abracon,tc-diode: ["abracon,tc-resistor"] |
| 57 | abracon,tc-resistor: ["abracon,tc-diode"] |
| 58 | |
| 59 | required: |
| 60 | - compatible |
| 61 | - reg |
| 62 | |
| 63 | allOf: |
| 64 | - $ref: rtc.yaml# |
| 65 | - if: |
| 66 | properties: |
| 67 | compatible: |
| 68 | not: |
| 69 | contains: |
| 70 | enum: |
| 71 | - abracon,abx80x |
| 72 | - abracon,ab0804 |
| 73 | - abracon,ab1804 |
| 74 | - abracon,ab0805 |
| 75 | - abracon,ab1805 |
| 76 | then: |
| 77 | properties: |
| 78 | abracon,tc-diode: false |
| 79 | abracon,tc-resistor: false |
| 80 | |
| 81 | unevaluatedProperties: false |
| 82 | |
| 83 | examples: |
| 84 | - | |
| 85 | #include <dt-bindings/interrupt-controller/irq.h> |
| 86 | |
| 87 | i2c { |
| 88 | #address-cells = <1>; |
| 89 | #size-cells = <0>; |
| 90 | |
| 91 | rtc@69 { |
| 92 | compatible = "abracon,abx80x"; |
| 93 | reg = <0x69>; |
| 94 | abracon,tc-diode = "schottky"; |
| 95 | abracon,tc-resistor = <3>; |
| 96 | interrupts = <44 IRQ_TYPE_EDGE_FALLING>; |
| 97 | }; |
| 98 | }; |