From: Karl Li <karl.li@xxxxxxxxxxxx> Add apu-mailbox dt-binding document. Signed-off-by: Karl Li <karl.li@xxxxxxxxxxxx> --- .../mailbox/mediatek,apu-mailbox.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/mediatek,apu-mailbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,apu-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,apu-mailbox.yaml new file mode 100644 index 000000000000..cb4530799bef --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/mediatek,apu-mailbox.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/mediatek,apu-mailbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek APU mailbox + +maintainers: + - Karl Li <Karl.Li@xxxxxxxxxxxx> + +description: + The MediaTek APU-Mailbox facilitates communication with the + APU microcontroller. Within the MediaTek APU subsystem, a + message passing mechanism is built on top of the mailbox system. + The mailbox only has limited space for each message. The firmware + expects the message header from the mailbox, while the message body + is passed through some fixed shared memory. + +properties: + compatible: + enum: + - mediatek,mt8188-apu-mailbox + - mediatek,mt8196-apu-mailbox + + "#mbox-cells": + const: 1 + description: + The cell describe which channel the device will use. + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + +required: + - compatible + - "#mbox-cells" + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + apu_mailbox: mailbox@4c200000 { + compatible = "mediatek,mt8196-apu-mailbox"; + reg = <0 0x4c200000 0 0xfffff>; + interrupts = <GIC_SPI 638 IRQ_TYPE_LEVEL_HIGH 0>; + #mbox-cells = <1>; + }; -- 2.18.0
