}
EXPORT_SYMBOL_GPL(device_get_child_node_count);
-bool device_dma_is_coherent(struct device *dev)
+bool device_dma_supported(struct device *dev)
{
- bool coherent = false;
-
+ /* For DT, this is always supported.
+ * For ACPI, this depends on CCA, which
+ * is determined by the acpi_dma_supported().
+ */
if (IS_ENABLED(CONFIG_OF) && dev->of_node)
- coherent = of_dma_is_coherent(dev->of_node);
- else
- acpi_check_dma(ACPI_COMPANION(dev), &coherent);
+ return true;
+
+ return acpi_dma_supported(ACPI_COMPANION(dev));
+}
+EXPORT_SYMBOL_GPL(device_dma_supported);
- return coherent;
+enum dev_dma_attr device_get_dma_attr(struct device *dev)
+{
+ enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED;
+
+ if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
+ if (of_dma_is_coherent(dev->of_node))
+ attr = DEV_DMA_COHERENT;
+ else
+ attr = DEV_DMA_NON_COHERENT;
+ } else
+ attr = acpi_get_dma_attr(ACPI_COMPANION(dev));
+
+ return attr;
}
-EXPORT_SYMBOL_GPL(device_dma_is_coherent);
+EXPORT_SYMBOL_GPL(device_get_dma_attr);
/**
* device_get_phy_mode - Get phy mode for given device