On Thu, Apr 16, 2020 at 03:03:35PM -0500, Eddie James wrote:
> Document the bindings for the Aspeed AST25XX and AST26XX XDMA engine.
>
> Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx>
> Reviewed-by: Andrew Jeffery <andrew@xxxxxxxx>
> ---
> Changes since v8:
> - dropped Rob's tag since this has changed significantly since he last looked
> it over.
If this is not merged soon, you're going to need to convert to schema.
> .../devicetree/bindings/soc/aspeed/xdma.txt | 45 ++++++++++++++++++++++
> MAINTAINERS | 6 +++
> 2 files changed, 51 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..35d0507
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/aspeed/xdma.txt
> @@ -0,0 +1,45 @@
> +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, and, for the AST2600, a second reset
> + associated with the PCI-E root complex
> + - reset-names : required only for the AST2600; must be
> + "device", "root-complex"
> + - interrupts-extended : two interrupt cells; the first specifies the global
> + interrupt for the XDMA engine and the second
> + specifies the PCI-E reset or PERST interrupt.
> + - aspeed,scu : a phandle to the syscon node for the system control
> + unit of the SOC
> + - memory-region : a phandle to the reserved memory region to be used by
> + the XDMA engine for DMA operations
> +
> +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.
aspeed,pcie-device
With that,
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> +
> +Example:
> +
> + 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>;
> + pcie-device = "bmc";
> + memory-region = <&vga_memory>;
> + };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 5e10560..66f82a2 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2771,6 +2771,12 @@ 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.txt
> +
> ASUS NOTEBOOKS AND EEEPC ACPI/WMI EXTRAS DRIVERS
> M: Corentin Chary <corentin.chary@xxxxxxxxx>
> L: acpi4asus-user@xxxxxxxxxxxxxxxxxxxxx
> --
> 1.8.3.1
>
