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device property: Adding DMA Attribute APIs for Generic Devices

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The function device_dma_is_coherent() does not sufficiently
communicate device DMA attributes. Instead, this patch introduces
device_get_dma_attr(), which returns enum dev_dma_attr.
It replaces the acpi_check_dma(), which will be removed in
subsequent patch.

This also provides a convenient function, device_dma_supported(),
to check DMA support of the specified device.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Suthikulpanit, Suravee
2015-10-28 15:50:49 -07:00
committed by Rafael J. Wysocki
parent b84f196d96
commit e5e558644b
2 changed files with 33 additions and 0 deletions
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4
include/linux/property.h
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@@ -176,6 +176,10 @@ void device_add_property_set(struct device *dev, struct property_set *pset);
bool device_dma_is_coherent(struct device *dev);
bool device_dma_supported(struct device *dev);
enum dev_dma_attr device_get_dma_attr(struct device *dev);
int device_get_phy_mode(struct device *dev);
void *device_get_mac_address(struct device *dev, char *addr, int alen);