[PATCH v11 1/8] dt-bindings: soc: Add Aspeed XDMA Engine
From: Eddie James
Date: Tue May 05 2020 - 12:59:13 EST
Document the bindings for the Aspeed AST25XX and AST26XX XDMA engine.
Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx>
Reviewed-by: Andrew Jeffery <andrew@xxxxxxxx>
---
.../devicetree/bindings/soc/aspeed/xdma.yaml | 103 +++++++++++++++++++++
MAINTAINERS | 6 ++
2 files changed, 109 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/aspeed/xdma.yaml
diff --git a/Documentation/devicetree/bindings/soc/aspeed/xdma.yaml b/Documentation/devicetree/bindings/soc/aspeed/xdma.yaml
new file mode 100644
index 0000000..4957435
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/aspeed/xdma.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/aspeed/xdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Aspeed AST25XX and AST26XX XDMA Engine
+
+maintainers:
+ - Eddie James <eajames@xxxxxxxxxxxxx>
+
+description: |
+ This binding describes the XDMA Engine embedded in the AST2500 and AST2600
+ SOCs. The XDMA engine can perform automatic DMA operations over PCI between
+ the SOC (acting as a BMC) and a host processor.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2500-xdma
+ - aspeed,ast2600-xdma
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ minItems: 1
+ maxItems: 2
+
+ reset-names:
+ maxItems: 2
+ items:
+ - const: device
+ - const: root-complex
+
+ interrupts:
+ maxItems: 2
+ items:
+ - description: global interrupt for the XDMA engine
+ - description: PCI-E reset or PERST interrupt
+
+ aspeed,scu:
+ description: a reference to the System Control Unit node of the Aspeed SOC.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/phandle
+
+ aspeed,pcie-device:
+ description: describes which PCI-E device the XDMA engine should use
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/string
+ - enum: [ bmc, vga ]
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - resets
+ - interrupts-extended
+ - aspeed,scu
+ - memory-region
+
+if:
+ properties:
+ compatible:
+ contains:
+ const: aspeed,ast2600-xdma
+then:
+ required:
+ - reset-names
+
+examples:
+ - |
+ #include <dt-bindings/clock/ast2600-clock.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/aspeed-scu-ic.h>
+ syscon: syscon@1e6e2000 {
+ reg = <0x1e6e2000 0x1000>;
+ ranges = <0 0x1e6e2000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ scu_ic0: interrupt-controller@560 {
+ reg = <0x560 0x4>;
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
+ xdma@1e6e7000 {
+ compatible = "aspeed,ast2600-xdma";
+ reg = <0x1e6e7000 0x100>;
+ clocks = <&syscon ASPEED_CLK_GATE_BCLK>;
+ resets = <&syscon ASPEED_RESET_DEV_XDMA>, <&syscon ASPEED_RESET_RC_XDMA>;
+ reset-names = "device", "root-complex";
+ interrupts-extended = <&gic GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
+ <&scu_ic0 ASPEED_AST2600_SCU_IC0_PCIE_PERST_LO_TO_HI>;
+ aspeed,scu = <&syscon>;
+ aspeed,pcie-device = "bmc";
+ memory-region = <&vga_memory>;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index b103ff0..6a421fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2780,6 +2780,12 @@ S: Maintained
F: Documentation/devicetree/bindings/media/aspeed-video.txt
F: drivers/media/platform/aspeed-video.c
+ASPEED XDMA ENGINE DRIVER
+M: Eddie James <eajames@xxxxxxxxxxxxx>
+L: linux-aspeed@xxxxxxxxxxxxxxxx (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/soc/aspeed/xdma.yaml
+
ASUS NOTEBOOKS AND EEEPC ACPI/WMI EXTRAS DRIVERS
M: Corentin Chary <corentin.chary@xxxxxxxxx>
L: acpi4asus-user@xxxxxxxxxxxxxxxxxxxxx
--
1.8.3.1