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>

diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c
index b1c20b2b564712eb320a0b2eb59d252e14151a1c..e446781b1892ae4091afafc4beb257d042a6174a 100644 (file)
--- 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