[PATCH v7 03/10] dt-bindings: mfd: Add Apple Mac System Management Controller
From: Sven Peter <sven@kernel.org>
Date: 2025-06-10 16:10:39
Also in:
asahi, b4-sent, linux-devicetree, linux-gpio, linux-pm, lkml
Subsystem:
arm/apple machine support, multifunction devices (mfd), open firmware and flattened device tree bindings, the rest · Maintainers:
Sven Peter, Janne Grunau, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: "Russell King (Oracle)" <redacted> Add a DT binding for the Apple Mac System Management Controller. Signed-off-by: Russell King (Oracle) <redacted> Reviewed-by: Linus Walleij <redacted> Reviewed-by: Krzysztof Kozlowski <redacted> Reviewed-by: Alyssa Rosenzweig <redacted> Reviewed-by: Neal Gompa <neal@gompa.dev> Signed-off-by: Sven Peter <sven@kernel.org> --- .../devicetree/bindings/mfd/apple,smc.yaml | 79 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 80 insertions(+)
diff --git a/Documentation/devicetree/bindings/mfd/apple,smc.yaml b/Documentation/devicetree/bindings/mfd/apple,smc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..8a10e270d421ecd703848f64af597de351fcfd74
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/apple,smc.yaml@@ -0,0 +1,79 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/apple,smc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple Mac System Management Controller + +maintainers: + - Sven Peter <sven@kernel.org> + +description: + Apple Mac System Management Controller implements various functions + such as GPIO, RTC, power, reboot. + +properties: + compatible: + items: + - enum: + - apple,t6000-smc + - apple,t8103-smc + - apple,t8112-smc + - const: apple,smc + + reg: + items: + - description: SMC area + - description: SRAM area + + reg-names: + items: + - const: smc + - const: sram + + mboxes: + maxItems: 1 + + gpio: + $ref: /schemas/gpio/apple,smc-gpio.yaml + + reboot: + $ref: /schemas/power/reset/apple,smc-reboot.yaml + +additionalProperties: false + +required: + - compatible + - reg + - reg-names + - mboxes + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + smc@23e400000 { + compatible = "apple,t8103-smc", "apple,smc"; + reg = <0x2 0x3e400000 0x0 0x4000>, + <0x2 0x3fe00000 0x0 0x100000>; + reg-names = "smc", "sram"; + mboxes = <&smc_mbox>; + + smc_gpio: gpio { + compatible = "apple,smc-gpio"; + gpio-controller; + #gpio-cells = <2>; + }; + + reboot { + compatible = "apple,smc-reboot"; + nvmem-cells = <&shutdown_flag>, <&boot_stage>, + <&boot_error_count>, <&panic_count>; + nvmem-cell-names = "shutdown_flag", "boot_stage", + "boot_error_count", "panic_count"; + }; + }; + };
diff --git a/MAINTAINERS b/MAINTAINERS
index 1dd004f7dff669e3a3609e5f1702887129d8ff35..329b2df08d4b1039948e54353c5815e23ae65e77 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS@@ -2339,6 +2339,7 @@ F: Documentation/devicetree/bindings/iommu/apple,dart.yaml F: Documentation/devicetree/bindings/iommu/apple,sart.yaml F: Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml F: Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml +F: Documentation/devicetree/bindings/mfd/apple,smc.yaml F: Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml F: Documentation/devicetree/bindings/nvme/apple,nvme-ans.yaml F: Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
--
2.34.1