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authorVinod Koul <vinod.koul@intel.com>2014-04-05 20:45:55 +0530
committerVinod Koul <vinod.koul@intel.com>2014-04-05 20:45:55 +0530
commit8673bcef8c1b07b83e9ee02d5e7f4b66507b03cd (patch)
treebc08b79fe11c4745434da1cebc5fb8936f9c6831 /Documentation
parente43a34e3ec5d1b14a11c3220f5a12aa797d73cd1 (diff)
parente7c0fe2a5c84b7bf4dcbbce30953b04b95e9dc09 (diff)
Merge branch 'topic/bam' into for-linus
Conflicts: drivers/dma/Makefile Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/dma/qcom_bam_dma.txt41
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt
new file mode 100644
index 000000000000..d75a9d767022
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt
@@ -0,0 +1,41 @@
+QCOM BAM DMA controller
+
+Required properties:
+- compatible: must contain "qcom,bam-v1.4.0" for MSM8974
+- reg: Address range for DMA registers
+- interrupts: Should contain the one interrupt shared by all channels
+- #dma-cells: must be <1>, the cell in the dmas property of the client device
+ represents the channel number
+- clocks: required clock
+- clock-names: must contain "bam_clk" entry
+- qcom,ee : indicates the active Execution Environment identifier (0-7) used in
+ the secure world.
+
+Example:
+
+ uart-bam: dma@f9984000 = {
+ compatible = "qcom,bam-v1.4.0";
+ reg = <0xf9984000 0x15000>;
+ interrupts = <0 94 0>;
+ clocks = <&gcc GCC_BAM_DMA_AHB_CLK>;
+ clock-names = "bam_clk";
+ #dma-cells = <1>;
+ qcom,ee = <0>;
+ };
+
+DMA clients must use the format described in the dma.txt file, using a two cell
+specifier for each channel.
+
+Example:
+ serial@f991e000 {
+ compatible = "qcom,msm-uart";
+ reg = <0xf991e000 0x1000>
+ <0xf9944000 0x19000>;
+ interrupts = <0 108 0>;
+ clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>,
+ <&gcc GCC_BLSP1_AHB_CLK>;
+ clock-names = "core", "iface";
+
+ dmas = <&uart-bam 0>, <&uart-bam 1>;
+ dma-names = "rx", "tx";
+ };