Linux-libre 4.8.2-gnupck-4.8.2-gnu

1 files changed, 45 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt b/Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
new file mode 100644
index 000000000..7ff13be17
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
@@ -0,0 +1,45 @@
+NVIDIA Tegra ACONNECT Bus
+
+The Tegra ACONNECT bus is an AXI switch which is used to connnect various
+components inside the Audio Processing Engine (APE). All CPU accesses to
+the APE subsystem go through the ACONNECT via an APB to AXI wrapper.
+
+Required properties:
+- compatible: Must be "nvidia,tegra210-aconnect".
+- clocks: Must contain the entries for the APE clock (TEGRA210_CLK_APE),
+  and APE interface clock (TEGRA210_CLK_APB2APE).
+- clock-names: Must contain the names "ape" and "apb2ape" for the corresponding
+  'clocks' entries.
+- power-domains: Must contain a phandle that points to the audio powergate
+  (namely 'aud') for Tegra210.
+- #address-cells: The number of cells used to represent physical base addresses
+  in the aconnect address space. Should be 1.
+- #size-cells: The number of cells used to represent the size of an address
+  range in the aconnect address space. Should be 1.
+- ranges: Mapping of the aconnect address space to the CPU address space.
+
+All devices accessed via the ACONNNECT are described by child-nodes.
+
+Example:
+
+	aconnect@702c0000 {
+		compatible = "nvidia,tegra210-aconnect";
+		clocks = <&tegra_car TEGRA210_CLK_APE>,
+			 <&tegra_car TEGRA210_CLK_APB2APE>;
+		clock-names = "ape", "apb2ape";
+		power-domains = <&pd_audio>;
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x702c0000 0x0 0x702c0000 0x00040000>;
+
+		status = "disabled";
+
+		child1 {
+			...
+		};
+
+		child2 {
+			...
+		};
+	};