Messages in this thread Patch in this message | | | From | Eddie James <> | Subject | [PATCH v2 05/12] dt-bindings: soc: Add Aspeed XDMA Engine | Date | Thu, 5 Dec 2019 11:15:05 -0600 |
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Document the bindings for the Aspeed AST25XX and AST26XX XDMA engine.
Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Rob Herring <robh@kernel.org> --- Changes since v1: - Add 'clocks', 'scu', 'sdmc', 'vga-mem', and 'pcie-device' property documentation
.../devicetree/bindings/soc/aspeed/xdma.txt | 43 ++++++++++++++++++++++ MAINTAINERS | 6 +++ 2 files changed, 49 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..942dc07 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/aspeed/xdma.txt @@ -0,0 +1,43 @@ +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 + - clocks : clock specifier for the clock associated with the + XDMA engine + - 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. + - scu : a phandle to the syscon node for the system control + unit of the SOC + - sdmc : a phandle to the syscon node for the SDRAM memory + controller of the SOC + - vga-mem : contains the address and size of the VGA memory space + to be used by the XDMA engine + +Optional properties: + - pcie-device : should be either "bmc" or "vga", corresponding to + which device should be used by the XDMA engine for + DMA operations. If this property is not set, the XDMA + engine will use the BMC PCI-E device. + +Example: + + xdma@1e6e7000 { + compatible = "aspeed,ast2500-xdma"; + reg = <0x1e6e7000 0x100>; + clocks = <&syscon ASPEED_CLK_GATE_BCLK>; + resets = <&syscon ASPEED_RESET_XDMA>; + interrupts-extended = <&vic 6>, <&scu_ic ASPEED_AST2500_SCU_IC_PCIE_RESET_LO_TO_HI>; + scu = <&syscon>; + sdmc = <&edac>; + pcie-device = "bmc"; + vga-mem = <0x9f000000 0x01000000>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 398861a..528a142 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2707,6 +2707,12 @@ 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@linux.ibm.com> +L: linux-aspeed@lists.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@gmail.com> L: acpi4asus-user@lists.sourceforge.net -- 1.8.3.1
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