nxp,bbnsm.yaml

  1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
  2%YAML 1.2
  3---
  4$id: http://devicetree.org/schemas/mfd/nxp,bbnsm.yaml#
  5$schema: http://devicetree.org/meta-schemas/core.yaml#
  6
  7title: NXP Battery-Backed Non-Secure Module
  8
  9maintainers:
 10  - Jacky Bai <ping.bai@nxp.com>
 11
 12description: |
 13  NXP BBNSM serves as non-volatile logic and storage for the system.
 14  it Intergrates RTC & ON/OFF control.
 15  The RTC can retain its state and continues counting even when the
 16  main chip is power down. A time alarm is generated once the most
 17  significant 32 bits of the real-time counter match the value in the
 18  Time Alarm register.
 19  The ON/OFF logic inside the BBNSM allows for connecting directly to
 20  a PMIC or other voltage regulator device. both smart PMIC mode and
 21  Dumb PMIC mode supported.
 22
 23properties:
 24  compatible:
 25    items:
 26      - enum:
 27          - nxp,imx93-bbnsm
 28      - const: syscon
 29      - const: simple-mfd
 30
 31  reg:
 32    maxItems: 1
 33
 34  rtc:
 35    type: object
 36    $ref: /schemas/rtc/rtc.yaml#
 37
 38    properties:
 39      compatible:
 40        enum:
 41          - nxp,imx93-bbnsm-rtc
 42
 43      interrupts:
 44        maxItems: 1
 45
 46      start-year: true
 47
 48    required:
 49      - compatible
 50      - interrupts
 51
 52    additionalProperties: false
 53
 54  pwrkey:
 55    type: object
 56    $ref: /schemas/input/input.yaml#
 57
 58    properties:
 59      compatible:
 60        enum:
 61          - nxp,imx93-bbnsm-pwrkey
 62
 63      interrupts:
 64        maxItems: 1
 65
 66      linux,code: true
 67
 68    required:
 69      - compatible
 70      - interrupts
 71
 72    additionalProperties: false
 73
 74required:
 75  - compatible
 76  - reg
 77  - rtc
 78  - pwrkey
 79
 80additionalProperties: false
 81
 82examples:
 83  - |
 84    #include <dt-bindings/input/linux-event-codes.h>
 85    #include <dt-bindings/interrupt-controller/arm-gic.h>
 86
 87    bbnsm: bbnsm@44440000 {
 88        compatible = "nxp,imx93-bbnsm", "syscon", "simple-mfd";
 89        reg = <0x44440000 0x10000>;
 90
 91        bbnsm_rtc: rtc {
 92            compatible = "nxp,imx93-bbnsm-rtc";
 93            interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
 94        };
 95
 96        bbnsm_pwrkey: pwrkey {
 97            compatible = "nxp,imx93-bbnsm-pwrkey";
 98            interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
 99            linux,code = <KEY_POWER>;
100        };
101    };