Add bindings for the mailbox controller. This work is based on the vendor kernel. [1] Link: https://github.com/revyos/thead-kernel.git [1] Signed-off-by: Michal Wilczynski <m.wilczynski@xxxxxxxxxxx> --- .../bindings/mailbox/thead,th1520-mbox.yaml | 83 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 84 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml b/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml new file mode 100644 index 000000000000..f446fae76398 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml @@ -0,0 +1,83 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) + +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/thead,th1520-mbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: T-head TH1520 Mailbox Controller + +description: | + The T-head mailbox controller enables two cores within the SoC to + communicate and coordinate by passing messages (e.g., data, status, + and control) through the mailbox channels. It also provides the ability + for one core to signal the other processor using interrupts. + +maintainers: + - Michal Wilczynski <m.wilczynski@xxxxxxxxxxx> + +properties: + compatible: + const: thead,th1520-mbox + + reg: + description: Contains base addresses and sizes for the mailbox and remote ICUs. + items: + - description: Mailbox local base address + - description: Remote ICU 0 base address + - description: Remote ICU 1 base address + - description: Remote ICU 2 base address + + reg-names: + items: + - const: local_base + - const: remote_icu0 + - const: remote_icu1 + - const: remote_icu2 + + interrupts: + maxItems: 1 + description: Interrupt for the mailbox controller. + + clocks: + maxItems: 1 + description: Clock phandle for the mailbox controller. + + clock-names: + items: + - const: ipg + + icu_cpu_id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: CPU ID for the ICU. + + '#mbox-cells': + const: 2 + description: Number of cells required to encode the mailbox specifier. + +additionalProperties: false + +required: + - compatible + - reg + - reg-names + - interrupts + - icu_cpu_id + - '#mbox-cells' + +dependencies: + clock-names: [ clocks ] + +examples: + - | + mbox_910t: mbox@ffffc38000 { + compatible = "thead,th1520-mbox"; + reg = <0xff 0xffc38000 0x0 0x4000>, + <0xff 0xffc44000 0x0 0x1000>, + <0xff 0xffc4c000 0x0 0x1000>, + <0xff 0xffc54000 0x0 0x1000>; + reg-names = "local_base", "remote_icu0", "remote_icu1", "remote_icu2"; + interrupts = <28 IRQ_TYPE_LEVEL_HIGH>; + icu_cpu_id = <0>; + #mbox-cells = <2>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 7331b30deef8..49198b2ed2e7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19719,6 +19719,7 @@ L: linux-riscv@xxxxxxxxxxxxxxxxxxx S: Maintained T: git https://github.com/pdp7/linux.git F: Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml +F: Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml F: arch/riscv/boot/dts/thead/ F: drivers/clk/thead/clk-th1520-ap.c F: drivers/mailbox/mailbox-th1520.c -- 2.34.1
