3 The eDMA3 consists of two components: Channel controller (CC) and Transfer
4 Controller(s) (TC). The CC is the main entry for DMA users since it is
5 responsible for the DMA channel handling, while the TCs are responsible to
6 execute the actual DMA tansfer.
8 ------------------------------------------------------------------------------
9 eDMA3 Channel Controller
12 - compatible: "ti,edma3-tpcc" for the channel controller(s)
13 - #dma-cells: Should be set to <2>. The first number is the DMA request
14 number and the second is the TC the channel is serviced on.
15 - reg: Memory map of eDMA CC
16 - reg-names: "edma3_cc"
17 - interrupts: Interrupt lines for CCINT, MPERR and CCERRINT.
18 - interrupt-names: "edma3_ccint", "emda3_mperr" and "edma3_ccerrint"
19 - ti,tptcs: List of TPTCs associated with the eDMA in the following form:
20 <&tptc_phandle TC_priority_number>. The highest priority is 0.
23 - ti,hwmods: Name of the hwmods associated to the eDMA CC
24 - ti,edma-memcpy-channels: List of channels allocated to be used for memcpy, iow
25 these channels will be SW triggered channels. See example.
26 - ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
27 the driver, they are allocated to be used by for example the
30 ------------------------------------------------------------------------------
31 eDMA3 Transfer Controller
34 - compatible: "ti,edma3-tptc" for the transfer controller(s)
35 - reg: Memory map of eDMA TC
36 - interrupts: Interrupt number for TCerrint.
39 - ti,hwmods: Name of the hwmods associated to the given eDMA TC
40 - interrupt-names: "edma3_tcerrint"
42 ------------------------------------------------------------------------------
46 compatible = "ti,edma3-tpcc";
48 reg = <0x49000000 0x10000>;
49 reg-names = "edma3_cc";
50 interrupts = <12 13 14>;
51 interrupt-names = "edma3_ccint", "emda3_mperr", "edma3_ccerrint";
55 ti,tptcs = <&edma_tptc0 7>, <&edma_tptc1 7>, <&edma_tptc2 0>;
57 /* Channel 20 and 21 is allocated for memcpy */
58 ti,edma-memcpy-channels = <20 21>;
59 /* The following PaRAM slots are reserved: 35-45 and 100-110 */
60 ti,edma-reserved-slot-ranges = /bits/ 16 <35 10>,
64 edma_tptc0: tptc@49800000 {
65 compatible = "ti,edma3-tptc";
67 reg = <0x49800000 0x100000>;
69 interrupt-names = "edm3_tcerrint";
72 edma_tptc1: tptc@49900000 {
73 compatible = "ti,edma3-tptc";
75 reg = <0x49900000 0x100000>;
77 interrupt-names = "edm3_tcerrint";
80 edma_tptc2: tptc@49a00000 {
81 compatible = "ti,edma3-tptc";
83 reg = <0x49a00000 0x100000>;
85 interrupt-names = "edm3_tcerrint";
89 compatible = "ti,omap4-sham";
91 reg = <0x53100000 0x200>;
93 /* DMA channel 36 executed on eDMA TC0 - low priority queue */
98 mcasp0: mcasp@48038000 {
99 compatible = "ti,am33xx-mcasp-audio";
100 ti,hwmods = "mcasp0";
101 reg = <0x48038000 0x2000>,
102 <0x46000000 0x400000>;
103 reg-names = "mpu", "dat";
104 interrupts = <80>, <81>;
105 interrupt-names = "tx", "rx";
107 /* DMA channels 8 and 9 executed on eDMA TC2 - high priority queue */
110 dma-names = "tx", "rx";
113 ------------------------------------------------------------------------------
114 DEPRECATED binding, new DTS files must use the ti,edma3-tpcc/ti,edma3-tptc
118 - compatible : "ti,edma3"
119 - #dma-cells: Should be set to <1>
120 Clients should use a single channel number per DMA request.
121 - reg: Memory map for accessing module
122 - interrupt-parent: Interrupt controller the interrupt is routed through
123 - interrupts: Exactly 3 interrupts need to be specified in the order:
124 1. Transfer completion interrupt.
125 2. Memory protection interrupt.
128 - ti,hwmods: Name of the hwmods associated to the EDMA
129 - ti,edma-xbar-event-map: Crossbar event to channel map
131 Deprecated properties:
132 Listed here in case one wants to boot an old kernel with new DTB. These
133 properties might need to be added to the new DTS files.
134 - ti,edma-regions: Number of regions
135 - ti,edma-slots: Number of slots
136 - dma-channels: Specify total DMA channels per CC
140 edma: edma@49000000 {
141 reg = <0x49000000 0x10000>;
142 interrupt-parent = <&intc>;
143 interrupts = <12 13 14>;
144 compatible = "ti,edma3";
145 ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";
147 ti,edma-xbar-event-map = /bits/ 16 <1 12