| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [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/mfd/nxp,bbnsm.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: NXP Battery-Backed Non-Secure Module |
| 8 | |
| 9 | maintainers: |
| 10 | - Jacky Bai <ping.bai@nxp.com> |
| 11 | |
| 12 | description: | |
| 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 | |
| 23 | properties: |
| 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 | |
| 74 | required: |
| 75 | - compatible |
| 76 | - reg |
| 77 | - rtc |
| 78 | - pwrkey |
| 79 | |
| 80 | additionalProperties: false |
| 81 | |
| 82 | examples: |
| 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 | }; |