diff options
author | 2015-08-04 12:17:53 -0700 | |
---|---|---|
committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/Documentation/devicetree/bindings/dma/arm-pl330.txt | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/Documentation/devicetree/bindings/dma/arm-pl330.txt')
-rw-r--r-- | kernel/Documentation/devicetree/bindings/dma/arm-pl330.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/dma/arm-pl330.txt b/kernel/Documentation/devicetree/bindings/dma/arm-pl330.txt new file mode 100644 index 000000000..267565894 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/dma/arm-pl330.txt @@ -0,0 +1,44 @@ +* ARM PrimeCell PL330 DMA Controller + +The ARM PrimeCell PL330 DMA controller can move blocks of memory contents +between memory and peripherals or memory to memory. + +Required properties: + - compatible: should include both "arm,pl330" and "arm,primecell". + - reg: physical base address of the controller and length of memory mapped + region. + - interrupts: interrupt number to the cpu. + +Optional properties: + - dma-coherent : Present if dma operations are coherent + - #dma-cells: must be <1>. used to represent the number of integer + cells in the dmas property of client device. + - dma-channels: contains the total number of DMA channels supported by the DMAC + - dma-requests: contains the total number of DMA requests supported by the DMAC + +Example: + + pdma0: pdma@12680000 { + compatible = "arm,pl330", "arm,primecell"; + reg = <0x12680000 0x1000>; + interrupts = <99>; + #dma-cells = <1>; + #dma-channels = <8>; + #dma-requests = <32>; + }; + +Client drivers (device nodes requiring dma transfers from dev-to-mem or +mem-to-dev) should specify the DMA channel numbers and dma channel names +as shown below. + + [property name] = <[phandle of the dma controller] [dma request id]>; + [property name] = <[dma channel name]> + + where 'dma request id' is the dma request number which is connected + to the client controller. The 'property name' 'dmas' and 'dma-names' + as required by the generic dma device tree binding helpers. The dma + names correspond 1:1 with the dma request ids in the dmas property. + + Example: dmas = <&pdma0 12 + &pdma1 11>; + dma-names = "tx", "rx"; |