6f18ce8026
Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").
Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
* Atmel Extensible Direct Memory Access Controller (XDMAC)
|
|
|
|
* XDMA Controller
|
|
Required properties:
|
|
- compatible: Should be "atmel,sama5d4-dma", "microchip,sam9x60-dma" or
|
|
"microchip,sama7g5-dma".
|
|
- reg: Should contain DMA registers location and length.
|
|
- interrupts: Should contain DMA interrupt.
|
|
- #dma-cells: Must be <1>, used to represent the number of integer cells in
|
|
the dmas property of client devices.
|
|
- The 1st cell specifies the channel configuration register:
|
|
- bit 13: SIF, source interface identifier, used to get the memory
|
|
interface identifier,
|
|
- bit 14: DIF, destination interface identifier, used to get the peripheral
|
|
interface identifier,
|
|
- bit 30-24: PERID, peripheral identifier.
|
|
|
|
Example:
|
|
|
|
dma1: dma-controller@f0004000 {
|
|
compatible = "atmel,sama5d4-dma";
|
|
reg = <0xf0004000 0x200>;
|
|
interrupts = <50 4 0>;
|
|
#dma-cells = <1>;
|
|
};
|
|
|
|
|
|
* DMA clients
|
|
DMA clients connected to the Atmel XDMA controller must use the format
|
|
described in the dma.txt file, using a one-cell specifier for each channel.
|
|
The two cells in order are:
|
|
1. A phandle pointing to the DMA controller.
|
|
2. Channel configuration register. Configurable fields are:
|
|
- bit 13: SIF, source interface identifier, used to get the memory
|
|
interface identifier,
|
|
- bit 14: DIF, destination interface identifier, used to get the peripheral
|
|
interface identifier,
|
|
- bit 30-24: PERID, peripheral identifier.
|
|
|
|
Example:
|
|
|
|
i2c2: i2c@f8024000 {
|
|
compatible = "atmel,at91sam9x5-i2c";
|
|
reg = <0xf8024000 0x4000>;
|
|
interrupts = <34 4 6>;
|
|
dmas = <&dma1
|
|
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
|
|
| AT91_XDMAC_DT_PERID(6))>,
|
|
<&dma1
|
|
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
|
|
| AT91_XDMAC_DT_PERID(7))>;
|
|
dma-names = "tx", "rx";
|
|
};
|