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authorSuthikulpanit, Suravee <Suravee.Suthikulpanit@amd.com>2015-06-10 11:08:55 -0500
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-06-15 14:40:49 +0200
commit04825cfedf525b455384547adb90102d02b293b4 (patch)
treebabeed41b72d46366e480289c71c9af7477fb4e2 /drivers/crypto
parent05ca556003b1d6b4df0b8831e4c07fad7f5bdd2c (diff)
crypto: ccp - Unify coherency checking logic with device_dma_is_coherent()
Currently, the driver has separate logic to determine device coherency for DT vs ACPI. This patch simplifies the code with a call to device_dma_is_coherent(). Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/ccp/ccp-platform.c60
1 files changed, 1 insertions, 59 deletions
diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c
index b1c20b2b5647..e446781b1892 100644
--- a/drivers/crypto/ccp/ccp-platform.c
+++ b/drivers/crypto/ccp/ccp-platform.c
@@ -90,58 +90,6 @@ static struct resource *ccp_find_mmio_area(struct ccp_device *ccp)
return NULL;
}
-#ifdef CONFIG_ACPI
-static int ccp_acpi_support(struct ccp_device *ccp)
-{
- struct ccp_platform *ccp_platform = ccp->dev_specific;
- struct acpi_device *adev = ACPI_COMPANION(ccp->dev);
- acpi_handle handle;
- acpi_status status;
- unsigned long long data;
- int cca;
-
- /* Retrieve the device cache coherency value */
- handle = adev->handle;
- do {
- status = acpi_evaluate_integer(handle, "_CCA", NULL, &data);
- if (!ACPI_FAILURE(status)) {
- cca = data;
- break;
- }
- } while (!ACPI_FAILURE(status));
-
- if (ACPI_FAILURE(status)) {
- dev_err(ccp->dev, "error obtaining acpi coherency value\n");
- return -EINVAL;
- }
-
- ccp_platform->coherent = !!cca;
-
- return 0;
-}
-#else /* CONFIG_ACPI */
-static int ccp_acpi_support(struct ccp_device *ccp)
-{
- return -EINVAL;
-}
-#endif
-
-#ifdef CONFIG_OF
-static int ccp_of_support(struct ccp_device *ccp)
-{
- struct ccp_platform *ccp_platform = ccp->dev_specific;
-
- ccp_platform->coherent = of_dma_is_coherent(ccp->dev->of_node);
-
- return 0;
-}
-#else
-static int ccp_of_support(struct ccp_device *ccp)
-{
- return -EINVAL;
-}
-#endif
-
static int ccp_platform_probe(struct platform_device *pdev)
{
struct ccp_device *ccp;
@@ -182,13 +130,7 @@ static int ccp_platform_probe(struct platform_device *pdev)
goto e_err;
}
- if (ccp_platform->use_acpi)
- ret = ccp_acpi_support(ccp);
- else
- ret = ccp_of_support(ccp);
- if (ret)
- goto e_err;
-
+ ccp_platform->coherent = device_dma_is_coherent(ccp->dev);
if (ccp_platform->coherent)
ccp->axcache = CACHE_WB_NO_ALLOC;
else