linux-kernel - [PATCH V5 2/9] device property: Introducing enum dev_dma

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Message-ID: <1446072654-5608-3-git-send-email-Suravee.Suthikulpanit@amd.com>
Date:	Wed, 28 Oct 2015 15:50:47 -0700
From:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
To:	<bhelgaas@...gle.com>, <rjw@...ysocki.net>, <lenb@...nel.org>,
	<catalin.marinas@....com>, <will.deacon@....com>
CC:	<hanjun.guo@...aro.org>, <thomas.lendacky@....com>,
	<herbert@...dor.apana.org.au>, <davem@...emloft.net>,
	<linux-acpi@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Subject: [PATCH V5 2/9] 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@....com>
CC: Rafael J. Wysocki <rjw@...ysocki.net>
CC: Bjorn Helgaas <bhelgaas@...gle.com>
---
 include/linux/property.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/property.h b/include/linux/property.h
index 463de52..8eecf20 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -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);
-- 
2.1.0

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