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-rw-r--r--Documentation/devicetree/bindings/dma/ti-edma.txt115
1 files changed, 114 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
index 5ba525a10..079b42a81 100644
--- a/Documentation/devicetree/bindings/dma/ti-edma.txt
+++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
@@ -1,4 +1,117 @@
-TI EDMA
+Texas Instruments eDMA
+
+The eDMA3 consists of two components: Channel controller (CC) and Transfer
+Controller(s) (TC). The CC is the main entry for DMA users since it is
+responsible for the DMA channel handling, while the TCs are responsible to
+execute the actual DMA tansfer.
+
+------------------------------------------------------------------------------
+eDMA3 Channel Controller
+
+Required properties:
+- compatible: "ti,edma3-tpcc" for the channel controller(s)
+- #dma-cells: Should be set to <2>. The first number is the DMA request
+ number and the second is the TC the channel is serviced on.
+- reg: Memory map of eDMA CC
+- reg-names: "edma3_cc"
+- interrupts: Interrupt lines for CCINT, MPERR and CCERRINT.
+- interrupt-names: "edma3_ccint", "emda3_mperr" and "edma3_ccerrint"
+- ti,tptcs: List of TPTCs associated with the eDMA in the following form:
+ <&tptc_phandle TC_priority_number>. The highest priority is 0.
+
+Optional properties:
+- ti,hwmods: Name of the hwmods associated to the eDMA CC
+- ti,edma-memcpy-channels: List of channels allocated to be used for memcpy, iow
+ these channels will be SW triggered channels. See example.
+- ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
+ the driver, they are allocated to be used by for example the
+ DSP. See example.
+
+------------------------------------------------------------------------------
+eDMA3 Transfer Controller
+
+Required properties:
+- compatible: "ti,edma3-tptc" for the transfer controller(s)
+- reg: Memory map of eDMA TC
+- interrupts: Interrupt number for TCerrint.
+
+Optional properties:
+- ti,hwmods: Name of the hwmods associated to the given eDMA TC
+- interrupt-names: "edma3_tcerrint"
+
+------------------------------------------------------------------------------
+Example:
+
+edma: edma@49000000 {
+ compatible = "ti,edma3-tpcc";
+ ti,hwmods = "tpcc";
+ reg = <0x49000000 0x10000>;
+ reg-names = "edma3_cc";
+ interrupts = <12 13 14>;
+ interrupt-names = "edma3_ccint", "emda3_mperr", "edma3_ccerrint";
+ dma-requests = <64>;
+ #dma-cells = <2>;
+
+ ti,tptcs = <&edma_tptc0 7>, <&edma_tptc1 7>, <&edma_tptc2 0>;
+
+ /* Channel 20 and 21 is allocated for memcpy */
+ ti,edma-memcpy-channels = <20 21>;
+ /* The following PaRAM slots are reserved: 35-44 and 100-109 */
+ ti,edma-reserved-slot-ranges = <35 10>, <100 10>;
+};
+
+edma_tptc0: tptc@49800000 {
+ compatible = "ti,edma3-tptc";
+ ti,hwmods = "tptc0";
+ reg = <0x49800000 0x100000>;
+ interrupts = <112>;
+ interrupt-names = "edm3_tcerrint";
+};
+
+edma_tptc1: tptc@49900000 {
+ compatible = "ti,edma3-tptc";
+ ti,hwmods = "tptc1";
+ reg = <0x49900000 0x100000>;
+ interrupts = <113>;
+ interrupt-names = "edm3_tcerrint";
+};
+
+edma_tptc2: tptc@49a00000 {
+ compatible = "ti,edma3-tptc";
+ ti,hwmods = "tptc2";
+ reg = <0x49a00000 0x100000>;
+ interrupts = <114>;
+ interrupt-names = "edm3_tcerrint";
+};
+
+sham: sham@53100000 {
+ compatible = "ti,omap4-sham";
+ ti,hwmods = "sham";
+ reg = <0x53100000 0x200>;
+ interrupts = <109>;
+ /* DMA channel 36 executed on eDMA TC0 - low priority queue */
+ dmas = <&edma 36 0>;
+ dma-names = "rx";
+};
+
+mcasp0: mcasp@48038000 {
+ compatible = "ti,am33xx-mcasp-audio";
+ ti,hwmods = "mcasp0";
+ reg = <0x48038000 0x2000>,
+ <0x46000000 0x400000>;
+ reg-names = "mpu", "dat";
+ interrupts = <80>, <81>;
+ interrupt-names = "tx", "rx";
+ status = "disabled";
+ /* DMA channels 8 and 9 executed on eDMA TC2 - high priority queue */
+ dmas = <&edma 8 2>,
+ <&edma 9 2>;
+ dma-names = "tx", "rx";
+};
+
+------------------------------------------------------------------------------
+DEPRECATED binding, new DTS files must use the ti,edma3-tpcc/ti,edma3-tptc
+binding.
Required properties:
- compatible : "ti,edma3"