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 /drivers/crypto/ccp/ccp-platform.c | |
| 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 'drivers/crypto/ccp/ccp-platform.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-platform.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c index 65e58291c668..b0a2806908f1 100644 --- a/drivers/crypto/ccp/ccp-platform.c +++ b/drivers/crypto/ccp/ccp-platform.c @@ -22,6 +22,7 @@ #include <linux/spinlock.h> #include <linux/delay.h> #include <linux/ccp.h> +#include <linux/of.h> #include "ccp-dev.h" @@ -112,6 +113,11 @@ static int ccp_platform_probe(struct platform_device *pdev) *(dev->dma_mask) = DMA_BIT_MASK(48); dev->coherent_dma_mask = DMA_BIT_MASK(48); + if (of_property_read_bool(dev->of_node, "dma-coherent")) + ccp->axcache = CACHE_WB_NO_ALLOC; + else + ccp->axcache = CACHE_NONE; + dev_set_drvdata(dev, ccp); ret = ccp_init(ccp); |