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Commit 05ca5560 authored by Suthikulpanit, Suravee's avatar Suthikulpanit, Suravee Committed by Rafael J. Wysocki
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device property: Introduces device_dma_is_coherent() 



Currently, device drivers, which support both OF and ACPI,
need to call two separate APIs, of_dma_is_coherent() and
acpi_dma_is_coherent()) to determine device coherency attribute.

This patch simplifies this process by introducing a new device
property API, device_dma_is_coherent(), which calls the appropriate
interface based on the booting architecture.

Signed-off-by: default avatarSuravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent b6197b93

drivers/base/property.c

+14 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/export.h>

#include <linux/kernel.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/property.h>



/**
@@ -519,3 +520,16 @@ unsigned int device_get_child_node_count(struct device *dev) 
	return count;

}

EXPORT_SYMBOL_GPL(device_get_child_node_count);



bool device_dma_is_coherent(struct device *dev)

{

	bool coherent = false;



	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 coherent;

}

EXPORT_SYMBOL_GPL(device_dma_is_coherent);

include/linux/property.h

+2 −0
Original line number Diff line number Diff line
@@ -164,4 +164,6 @@ struct property_set { 


void device_add_property_set(struct device *dev, struct property_set *pset);



bool device_dma_is_coherent(struct device *dev);



#endif /* _LINUX_PROPERTY_H_ */