dmaengine: qcom_hidma: Add identity register support

The location for destination event channel register has been relocated from
offset 0x28 to 0x40. Update the code accordingly.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index c146c6d..963cc52 100644 (file)
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -107,6 +107,7 @@ MODULE_PARM_DESC(nr_desc_prm, "number of descriptors (default: 0)");
 
 enum hidma_cap {
        HIDMA_MSI_CAP = 1,
+       HIDMA_IDENTITY_CAP,
 };
 
 /* process completed descriptors */
@@ -838,7 +839,10 @@ static int hidma_probe(struct platform_device *pdev)
        if (!dmadev->nr_descriptors)
                dmadev->nr_descriptors = HIDMA_NR_DEFAULT_DESC;
 
-       dmadev->chidx = readl(dmadev->dev_trca + 0x28);
+       if (hidma_test_capability(&pdev->dev, HIDMA_IDENTITY_CAP))
+               dmadev->chidx = readl(dmadev->dev_trca + 0x40);
+       else
+               dmadev->chidx = readl(dmadev->dev_trca + 0x28);
 
        /* Set DMA mask to 64 bits. */
        rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
@@ -944,7 +948,7 @@ static int hidma_remove(struct platform_device *pdev)
 static const struct acpi_device_id hidma_acpi_ids[] = {
        {"QCOM8061"},
        {"QCOM8062", HIDMA_MSI_CAP},
-       {"QCOM8063", HIDMA_MSI_CAP},
+       {"QCOM8063", (HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP)},
        {},
 };
 MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@@ -953,7 +957,8 @@ MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
 static const struct of_device_id hidma_match[] = {
        {.compatible = "qcom,hidma-1.0",},
        {.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},
-       {.compatible = "qcom,hidma-1.2", .data = (void *)(HIDMA_MSI_CAP),},
+       {.compatible = "qcom,hidma-1.2",
+        .data = (void *)(HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP),},
        {},
 };
 MODULE_DEVICE_TABLE(of, hidma_match);