linux-kernel - [PATCH 05/12] dt-bindings: soc: Add Aspeed XDMA Engine

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Date:   Fri,  8 Nov 2019 14:18:26 -0600
From:   Eddie James <eajames@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-aspeed@...ts.ozlabs.org, andrew@...id.au, joel@....id.au,
        maz@...nel.org, jason@...edaemon.net, tglx@...utronix.de,
        robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org
Subject: [PATCH 05/12] dt-bindings: soc: Add Aspeed XDMA Engine

Document the bindings for the Aspeed AST25XX and AST26XX XDMA engine.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 .../devicetree/bindings/soc/aspeed/xdma.txt        | 24 ++++++++++++++++++++++
 MAINTAINERS                                        |  6 ++++++
 2 files changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/aspeed/xdma.txt

diff --git a/Documentation/devicetree/bindings/soc/aspeed/xdma.txt b/Documentation/devicetree/bindings/soc/aspeed/xdma.txt
new file mode 100644
index 0000000..b6053e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/aspeed/xdma.txt
@@ -0,0 +1,24 @@
+Aspeed AST25XX and AST26XX XDMA Engine
+
+The XDMA Engine embedded in the AST2500 and AST2600 SOCs can perform automatic
+DMA operations over PCI between the SOC (acting as a BMC) and a host processor.
+
+Required properties:
+ - compatible		: must be "aspeed,ast2500-xdma" or
+			  "aspeed,ast2600-xdma"
+ - reg			: contains the address and size of the memory region
+			  associated with the XDMA engine registers
+ - resets		: reset specifier for the syscon reset associated with
+			  the XDMA engine
+ - interrupts-extended	: two interrupt nodes; the first specifies the global
+			  interrupt for the XDMA engine and the second
+			  specifies the PCI-E reset or PERST interrupt.
+
+Example:
+
+    xdma@...e7000 {
+        compatible = "aspeed,ast2500-xdma";
+        reg = <0x1e6e7000 0x100>;
+        resets = <&syscon ASPEED_RESET_XDMA>;
+        interrupts-extended = <&vic 6>, <&scu_ic ASPEED_AST2500_SCU_IC_PCIE_RESET_LO_TO_HI>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index c46181c..540bd45 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2691,6 +2691,12 @@ S:	Maintained
 F:	drivers/media/platform/aspeed-video.c
 F:	Documentation/devicetree/bindings/media/aspeed-video.txt
 
+ASPEED XDMA ENGINE DRIVER
+M:	Eddie James <eajames@...ux.ibm.com>
+L:	linux-aspeed@...ts.ozlabs.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/soc/aspeed/xdma.txt
+
 ASUS NOTEBOOKS AND EEEPC ACPI/WMI EXTRAS DRIVERS
 M:	Corentin Chary <corentin.chary@...il.com>
 L:	acpi4asus-user@...ts.sourceforge.net
-- 
1.8.3.1