[PATCH 02/10] dt-bindings: mailbox: apple: Add DockChannel mailbox
Michael Reeves via B4 Relay <[email protected]>
| Newsgroups | dev.linux.lists.asahi,dev.linux.lists.iommu,org.infradead.lists.linux-arm-kernel,org.kernel.feeds.b4-sent,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-input,org.kernel.vger.linux-kernel |
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| Message-ID | <[email protected]> |
From: Michael Reeves <[email protected]> DockChannel is a FIFO and interrupt block used by Apple coprocessors to exchange byte-stream traffic with the AP. Describe it as a mailbox provider so HID and future serial clients can use the common mailbox API. Signed-off-by: Michael Reeves <[email protected]> --- .../bindings/mailbox/apple,dockchannel.yaml | 75 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 76 insertions(+) diff --git a/Documentation/devicetree/bindings/mailbox/apple,dockchannel.yaml b/Documentation/devicetree/bindings/mailbox/apple,dockchannel.yaml new file mode 100644 index 000000000000..4f326d8f3d5a --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/apple,dockchannel.yaml @@ -0,0 +1,75 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/apple,dockchannel.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple DockChannel FIFO Mailbox + +maintainers: + - Michael Reeves <[email protected]> + +description: + DockChannel is a hardware FIFO and interrupt block used on Apple SoCs for + low-latency byte stream communication with co-processors. + +properties: + compatible: + oneOf: + - items: + - const: apple,t8112-dockchannel + - items: + - enum: + - apple,t6020-dockchannel + - apple,t8122-dockchannel + - const: apple,t8112-dockchannel + + reg: + items: + - description: Interrupt control registers + - description: FIFO configuration registers + - description: FIFO data registers + + reg-names: + items: + - const: irq + - const: config + - const: data + + interrupts: + maxItems: 1 + + "#mbox-cells": + const: 0 + + nonposted-mmio: true + +required: + - compatible + - reg + - reg-names + - interrupts + - "#mbox-cells" + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/apple-aic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + mailbox@24eb14000 { + compatible = "apple,t8112-dockchannel"; + reg = <0x2 0x4eb14000 0x0 0x4000>, + <0x2 0x4eb30000 0x0 0x4000>, + <0x2 0x4eb34000 0x0 0x4000>; + reg-names = "irq", "config", "data"; + interrupt-parent = <&aic>; + interrupts = <AIC_IRQ 850 IRQ_TYPE_LEVEL_HIGH>; + #mbox-cells = <0>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 15011f5752a9..741974f0f326 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2594,6 +2594,7 @@ F: Documentation/devicetree/bindings/interrupt-controller/apple,* 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,dockchannel.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 -- 2.51.2