forked from Minki/linux
29aebfde88
This patch simply adds a new DMATYPE for SAI which's included in i.MX6 Solo X. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
86 lines
2.0 KiB
Plaintext
86 lines
2.0 KiB
Plaintext
* Freescale Smart Direct Memory Access (SDMA) Controller for i.MX
|
|
|
|
Required properties:
|
|
- compatible : Should be one of
|
|
"fsl,imx25-sdma"
|
|
"fsl,imx31-sdma", "fsl,imx31-to1-sdma", "fsl,imx31-to2-sdma"
|
|
"fsl,imx35-sdma", "fsl,imx35-to1-sdma", "fsl,imx35-to2-sdma"
|
|
"fsl,imx51-sdma"
|
|
"fsl,imx53-sdma"
|
|
"fsl,imx6q-sdma"
|
|
The -to variants should be preferred since they allow to determine the
|
|
correct ROM script addresses needed for the driver to work without additional
|
|
firmware.
|
|
- reg : Should contain SDMA registers location and length
|
|
- interrupts : Should contain SDMA interrupt
|
|
- #dma-cells : Must be <3>.
|
|
The first cell specifies the DMA request/event ID. See details below
|
|
about the second and third cell.
|
|
- fsl,sdma-ram-script-name : Should contain the full path of SDMA RAM
|
|
scripts firmware
|
|
|
|
The second cell of dma phandle specifies the peripheral type of DMA transfer.
|
|
The full ID of peripheral types can be found below.
|
|
|
|
ID transfer type
|
|
---------------------
|
|
0 MCU domain SSI
|
|
1 Shared SSI
|
|
2 MMC
|
|
3 SDHC
|
|
4 MCU domain UART
|
|
5 Shared UART
|
|
6 FIRI
|
|
7 MCU domain CSPI
|
|
8 Shared CSPI
|
|
9 SIM
|
|
10 ATA
|
|
11 CCM
|
|
12 External peripheral
|
|
13 Memory Stick Host Controller
|
|
14 Shared Memory Stick Host Controller
|
|
15 DSP
|
|
16 Memory
|
|
17 FIFO type Memory
|
|
18 SPDIF
|
|
19 IPU Memory
|
|
20 ASRC
|
|
21 ESAI
|
|
22 SSI Dual FIFO (needs firmware ver >= 2)
|
|
23 Shared ASRC
|
|
24 SAI
|
|
|
|
The third cell specifies the transfer priority as below.
|
|
|
|
ID transfer priority
|
|
-------------------------
|
|
0 High
|
|
1 Medium
|
|
2 Low
|
|
|
|
Examples:
|
|
|
|
sdma@83fb0000 {
|
|
compatible = "fsl,imx51-sdma", "fsl,imx35-sdma";
|
|
reg = <0x83fb0000 0x4000>;
|
|
interrupts = <6>;
|
|
#dma-cells = <3>;
|
|
fsl,sdma-ram-script-name = "sdma-imx51.bin";
|
|
};
|
|
|
|
DMA clients connected to the i.MX SDMA controller must use the format
|
|
described in the dma.txt file.
|
|
|
|
Examples:
|
|
|
|
ssi2: ssi@70014000 {
|
|
compatible = "fsl,imx51-ssi", "fsl,imx21-ssi";
|
|
reg = <0x70014000 0x4000>;
|
|
interrupts = <30>;
|
|
clocks = <&clks 49>;
|
|
dmas = <&sdma 24 1 0>,
|
|
<&sdma 25 1 0>;
|
|
dma-names = "rx", "tx";
|
|
fsl,fifo-depth = <15>;
|
|
};
|