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Message-ID: <20210826061623.6352-2-chiawei_wang@aspeedtech.com>
Date: Thu, 26 Aug 2021 14:16:20 +0800
From: Chia-Wei Wang <chiawei_wang@...eedtech.com>
To: <joel@....id.au>, <robh+dt@...nel.org>, <andrew@...id.au>,
<linux-aspeed@...ts.ozlabs.org>, <openbmc@...ts.ozlabs.org>,
<devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v3 1/4] dt-bindings: aspeed: Add eSPI controller
Add dt-bindings for Aspeed eSPI controller
Signed-off-by: Chia-Wei Wang <chiawei_wang@...eedtech.com>
---
.../devicetree/bindings/soc/aspeed/espi.yaml | 157 ++++++++++++++++++
1 file changed, 157 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/aspeed/espi.yaml
diff --git a/Documentation/devicetree/bindings/soc/aspeed/espi.yaml b/Documentation/devicetree/bindings/soc/aspeed/espi.yaml
new file mode 100644
index 000000000000..f8948efde379
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/aspeed/espi.yaml
@@ -0,0 +1,157 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# # Copyright (c) 2021 Aspeed Technology Inc.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/aspeed/espi.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Aspeed eSPI Controller
+
+maintainers:
+ - Chia-Wei Wang <chiawei_wang@...eedtech.com>
+ - Ryan Chen <ryan_chen@...eedtech.com>
+
+description:
+ Aspeed eSPI controller implements a slave side eSPI endpoint device
+ supporting the four eSPI channels, namely peripheral, virtual wire,
+ out-of-band, and flash.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - aspeed,ast2500-espi
+ - aspeed,ast2600-espi
+ - const: simple-mfd
+ - const: syscon
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 1
+
+ ranges: true
+
+ espi-ctrl:
+ type: object
+
+ properties:
+ compatible:
+ items:
+ - enum:
+ - aspeed,ast2500-espi-ctrl
+ - aspeed,ast2600-espi-ctrl
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ perif,memcyc-enable:
+ type: boolean
+ description: Enable memory cycle over eSPI peripheral channel
+
+ perif,memcyc-src-addr:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: The Host side address to be decoded into the memory cycle over eSPI peripheral channel
+
+ perif,memcyc-size:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: The size of the memory region allocated for the memory cycle over eSPI peripheral channel
+ minimum: 65536
+
+ perif,dma-mode:
+ type: boolean
+ description: Enable DMA support for eSPI peripheral channel
+
+ oob,dma-mode:
+ type: boolean
+ description: Enable DMA support for eSPI out-of-band channel
+
+ oob,dma-tx-desc-num:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 2
+ maximum: 1023
+ description: The number of TX descriptors available for eSPI OOB DMA engine
+
+ oob,dma-rx-desc-num:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 2
+ maximum: 1023
+ description: The number of RX descriptors available for eSPI OOB DMA engine
+
+ flash,dma-mode:
+ type: boolean
+ description: Enable DMA support for eSPI flash channel
+
+ flash,safs-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [ 0, 1, 2 ]
+ default: 0
+ description: Slave-Attached-Sharing-Flash mode, 0->Mix, 1->SW, 2->HW
+
+ dependencies:
+ perif,memcyc-src-addr: [ "perif,memcyc-enable" ]
+ perif,memcyc-size: [ "perif,memcyc-enable" ]
+ oob,dma-tx-desc-num: [ "oob,dma-mode" ]
+ oob,dma-rx-desc-num: [ "oob,dma-mode" ]
+
+ required:
+ - compatible
+ - interrupts
+ - clocks
+
+ espi-mmbi:
+ type: object
+
+ properties:
+ compatible:
+ const: aspeed,ast2600-espi-mmbi
+
+ interrupts:
+ maxItems: 1
+
+ required:
+ - compatible
+ - interrupts
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+ - ranges
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/ast2600-clock.h>
+
+ espi: espi@...ee000 {
+ compatible = "aspeed,ast2600-espi", "simple-mfd", "syscon";
+ reg = <0x1e6ee000 0x1000>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x0 0x1e6ee000 0x1000>;
+
+ espi_ctrl: espi-ctrl@0 {
+ compatible = "aspeed,ast2600-espi-ctrl";
+ reg = <0x0 0x800>;
+ interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&syscon ASPEED_CLK_GATE_ESPICLK>;
+ };
+
+ espi_mmbi: espi-mmbi@800 {
+ compatible = "aspeed,ast2600-espi-mmbi";
+ reg = <0x800 0x50>;
+ interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+ };
+ };
--
2.17.1
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