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Signed-off-by: Jacky Bai Reviewed-by: Rob Herring --- - v2 changes: - remove the redundant 'bindings' string - add ref to rtc.yaml - add start-year property - rename 'regmap' to 'nxp,bbnsm-regmap' and add description & type define - add header files including in the example and correct the indentation -v3 changes: - remove the 'nxp,bbnsm-regmap' property, get the regmap directly from the parent node in rtc/pwrkey driver - v4 changes: - update the compatible string to include the soc id as Rob suggested --- .../devicetree/bindings/mfd/nxp,bbnsm.yaml | 101 ++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/nxp,bbnsm.yaml diff --git a/Documentation/devicetree/bindings/mfd/nxp,bbnsm.yaml b/Documentation/devicetree/bindings/mfd/nxp,bbnsm.yaml new file mode 100644 index 000000000000..b1ade64a1554 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/nxp,bbnsm.yaml @@ -0,0 +1,101 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/nxp,bbnsm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP Battery-Backed Non-Secure Module + +maintainers: + - Jacky Bai + +description: | + NXP BBNSM serves as non-volatile logic and storage for the system. + it Intergrates RTC & ON/OFF control. + The RTC can retain its state and continues counting even when the + main chip is power down. A time alarm is generated once the most + significant 32 bits of the real-time counter match the value in the + Time Alarm register. + The ON/OFF logic inside the BBNSM allows for connecting directly to + a PMIC or other voltage regulator device. both smart PMIC mode and + Dumb PMIC mode supported. + +properties: + compatible: + items: + - enum: + - nxp,imx93-bbnsm + - const: syscon + - const: simple-mfd + + reg: + maxItems: 1 + + rtc: + type: object + $ref: /schemas/rtc/rtc.yaml# + + properties: + compatible: + enum: + - nxp,imx93-bbnsm-rtc + + interrupts: + maxItems: 1 + + start-year: true + + required: + - compatible + - interrupts + + additionalProperties: false + + pwrkey: + type: object + $ref: /schemas/input/input.yaml# + + properties: + compatible: + enum: + - nxp,imx93-bbnsm-pwrkey + + interrupts: + maxItems: 1 + + linux,code: true + + required: + - compatible + - interrupts + + additionalProperties: false + +required: + - compatible + - reg + - rtc + - pwrkey + +additionalProperties: false + +examples: + - | + #include + #include + + bbnsm: bbnsm@44440000 { + compatible = "nxp,imx93-bbnsm", "syscon", "simple-mfd"; + reg = <0x44440000 0x10000>; + + bbnsm_rtc: rtc { + compatible = "nxp,imx93-bbnsm-rtc"; + interrupts = ; + }; + + bbnsm_pwrkey: pwrkey { + compatible = "nxp,imx93-bbnsm-pwrkey"; + interrupts = ; + linux,code = ; + }; + };