diff options
| author | Christian Lamparter <chunkeey@gmail.com> | 2018-11-17 19:17:20 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2018-11-24 17:37:22 +0300 |
| commit | 538098281ce884a51d2aa4ab445056a41741c6ad (patch) | |
| tree | b08bce2594dbfc9fb733977468783e103474780b /Documentation/devicetree/bindings/dma/snps-dma.txt | |
| parent | 651022382c7f8da46cb4872a545ee1da6d097d2a (diff) | |
| download | linux-538098281ce884a51d2aa4ab445056a41741c6ad.tar.xz | |
dt-bindings: dmaengine: dw-dmac: add protection control property
This patch for the DesignWare AHB Central
Direct Memory Access Controller adds the dma
protection control property:
"snps,dma-protection-control"
as well as the properties specific values defines into
a new include file: include/dt-bindings/dma/dw-dmac.h
Note: The protection control signals are one-to-one
mapped to the AHB HPROT[1:3] signals for this controller.
The HPROT0 (Data Access) is always hardwired to 1.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/dma/snps-dma.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/snps-dma.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/snps-dma.txt b/Documentation/devicetree/bindings/dma/snps-dma.txt index 39e2b26be344..db757df7057d 100644 --- a/Documentation/devicetree/bindings/dma/snps-dma.txt +++ b/Documentation/devicetree/bindings/dma/snps-dma.txt @@ -27,6 +27,10 @@ Optional properties: general purpose DMA channel allocator. False if not passed. - multi-block: Multi block transfers supported by hardware. Array property with one cell per channel. 0: not supported, 1 (default): supported. +- snps,dma-protection-control: AHB HPROT[3:1] protection setting. + The default value is 0 (for non-cacheable, non-buffered, + unprivileged data access). + Refer to include/dt-bindings/dma/dw-dmac.h for possible values. Example: |