Linux-libre 4.4-gnupck-4.4-gnu

2 files changed, 127 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt b/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt
index 63a48928f..b152a75dc 100644
--- a/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt
+++ b/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt
@@ -2,9 +2,10 @@ Texas Instruments DMA Crossbar (DMA request router)
 
 Required properties:
 - compatible:	"ti,dra7-dma-crossbar" for DRA7xx DMA crossbar
+		"ti,am335x-edma-crossbar" for AM335x and AM437x
 - reg:		Memory map for accessing module
-- #dma-cells:	Should be set to <1>.
-		Clients should use the crossbar request number (input)
+- #dma-cells:	Should be set to to match with the DMA controller's dma-cells
+		for ti,dra7-dma-crossbar and <3> for ti,am335x-edma-crossbar.
 - dma-requests:	Number of DMA requests the crossbar can receive
 - dma-masters:	phandle pointing to the DMA controller
 
@@ -14,6 +15,15 @@ The DMA controller node need to have the following poroperties:
 Optional properties:
 - ti,dma-safe-map: Safe routing value for unused request lines
 
+Notes:
+When requesting channel via ti,dra7-dma-crossbar, the DMA clinet must request
+the DMA event number as crossbar ID (input to the DMA crossbar).
+
+For ti,am335x-edma-crossbar: the meaning of parameters of dmas for clients:
+dmas = <&edma_xbar 12 0 1>; where <12> is the DMA request number, <0> is the TC
+the event should be assigned and <1> is the mux selection for in the crossbar.
+When mux 0 is used the DMA channel can be requested directly from edma node.
+
 Example:
 
 /* DMA controller */
@@ -47,6 +57,7 @@ uart1: serial@4806a000 {
 	ti,hwmods = "uart1";
 	clock-frequency = <48000000>;
 	status = "disabled";
+	/* Requesting crossbar input 49 and 50 */
 	dmas = <&sdma_xbar 49>, <&sdma_xbar 50>;
 	dma-names = "tx", "rx";
 };
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"