diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2014-07-10 10:58:35 -0500 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-07-23 21:28:38 +0800 |
| commit | 126ae9adc1ec8d9006542f1a5e474b0183845e21 (patch) | |
| tree | f3ee814b261aa440feae1b5785f797aaa16cced7 /Documentation | |
| parent | 96956aef2ff5521af44d6cb896c967d025360ead (diff) | |
crypto: ccp - Base AXI DMA cache settings on device tree
The default cache operations for ARM64 were changed during 3.15.
To use coherent operations a "dma-coherent" device tree property
is required. If that property is not present in the device tree
node then the non-coherent operations are assigned for the device.
Add support to the ccp driver to assign the AXI DMA cache settings
based on whether the "dma-coherent" property is present in the device
node. If present, use settings that work with the caches. If not
present, use settings that do not look at the caches.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/crypto/amd-ccp.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/crypto/amd-ccp.txt b/Documentation/devicetree/bindings/crypto/amd-ccp.txt index 6e0b11aa8995..8c61183b41e0 100644 --- a/Documentation/devicetree/bindings/crypto/amd-ccp.txt +++ b/Documentation/devicetree/bindings/crypto/amd-ccp.txt @@ -7,6 +7,9 @@ Required properties: that services interrupts for this device - interrupts: Should contain the CCP interrupt +Optional properties: +- dma-coherent: Present if dma operations are coherent + Example: ccp@e0100000 { compatible = "amd,ccp-seattle-v1a"; |