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device property: Introducing enum dev_dma_attr 

A device could have one of the following DMA attributes:
    * DMA not supported
    * DMA non-coherent
    * DMA coherent

So, this patch introduces enum dev_dma_attribute. This will be used by
new APIs introduced in later patches.

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 15:50:47 -07:00 committed by Rafael J. Wysocki
parent d764c21c7b
commit 1b9863c6aa
1 changed files with 6 additions and 0 deletions
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6
include/linux/property.h
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@ -27,6 +27,12 @@ enum dev_prop_type {
DEV_PROP_MAX,
};
enum dev_dma_attr {
DEV_DMA_NOT_SUPPORTED,
DEV_DMA_NON_COHERENT,
DEV_DMA_COHERENT,
};
bool device_property_present(struct device *dev, const char *propname);
int device_property_read_u8_array(struct device *dev, const char *propname,
u8 *val, size_t nval);