Add new binding document for the APU remote processor. The initial version is used for MT8192 SOC.
Signed-off-by: Pi-Cheng Chen pi-cheng.chen@mediatek.com Signed-off-by: Flora Fu flora.fu@mediatek.com
--- .../bindings/remoteproc/mediatek,apu-rv.yaml | 106 ++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml
diff --git a/Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml b/Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml new file mode 100644 index 000000000000..c390b85040eb --- /dev/null +++ b/Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml @@ -0,0 +1,106 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2021 (C) MediaTek Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/remoteproc/mediatek,apu-rv.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek APU remote processor controller bindings + +description: | + APU integrated subsystem having MD32RV33 (MD32) that runs tinysys. + The tinysys runs on a microprocessor in APU. + Its firmware is loaded and booted from Kernel side. + Kernel and tinysys uses IPI to send and receive messages. + +maintainers: + - Flora Fu flora.fu@mediatek.com + - Pi-Cheng Chen pi-cheng.chen@mediatek.com + +properties: + compatible: + items: + - enum: + - mediatek,mt8192-apusys-rv + - const: simple-mfd + + reg: + minItems: 1 + + reg-names: + minItems: 1 + + power-domains: + maxItems: 1 + + iommus: + maxItems: 1 + + interrupts: + description: List of interrupts. + + interrupt-names: + description: Name list of interrupts. + + mboxes: + maxItems: 1 + +required: + - compatible + - reg + - power-domains + - interrupts + - mboxes + +additionalProperties: + type: object + description: + Represent subnodes that will register as rpmsg devices. + properties: + compatible: + enum: + - mediatek,apu-ctrl-rpmsg + - mediatek,apupwr-tx-rpmsg + - mediatek,apupwr-rx-rpmsg + - mediatek,apu-mdw-rpmsg + mediatek,rpmsg-name: + $ref: /schemas/types.yaml#/definitions/string-array + description: + Contains the name for the rpmsg device. Used to match + the subnode to rpmsg device announced by APU. + required: + - compatible + +examples: + - | + #include <dt-bindings/clock/mt8192-clk.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/memory/mt8192-larb-port.h> + + apusys_rv@19001000 { + compatible = "mediatek,mt8192-apusys-rv", "simple-mfd"; + reg = <0x19001000 0x1000>; + reg-names = "md32_sysctrl"; + power-domains = <&apuspm 0>; + iommus = <&iommu_apu IOMMU_PORT_APU_DATA>; + interrupts = <GIC_SPI 393 IRQ_TYPE_LEVEL_HIGH 0>; + interrupt-names = "apu_wdt"; + mboxes = <&apu_mailbox 0>; + apu_ctrl { + compatible = "mediatek,apu-ctrl-rpmsg"; + mediatek,rpmsg-name = "apu-ctrl-rpmsg"; + }; + apu_pwr_tx { + compatible = "mediatek,apupwr-tx-rpmsg"; + mediatek,rpmsg-name = "apupwr-tx-rpmsg"; + }; + apu_pwr_rx { + compatible = "mediatek,apupwr-rx-rpmsg"; + mediatek,rpmsg-name = "apupwr-rx-rpmsg"; + }; + apu_mdw_rpmsg { + compatible = "mediatek,apu-mdw-rpmsg"; + mediatek,rpmsg-name = "apu-mdw-rpmsg"; + }; + };