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authorPawel Moll <pawel.moll@arm.com>2011-10-24 17:07:03 +0400
committerRusty Russell <rusty@rustcorp.com.au>2011-11-02 05:11:01 +0400
commitedfd52e6367270c90f3fd7cc302b375ffa89f91e (patch)
tree1a847022a6ee87524461ecd2427e7f23acab48ce /Documentation/devicetree
parent005b20a8e0f587a46a00910ba4507bb9f6da70ea (diff)
downloadlinux-edfd52e6367270c90f3fd7cc302b375ffa89f91e.tar.xz
virtio: Add platform bus driver for memory mapped virtio device
This patch, based on virtio PCI driver, adds support for memory mapped (platform) virtio device. This should allow environments like qemu to use virtio-based block & network devices even on platforms without PCI support. One can define and register a platform device which resources will describe memory mapped control registers and "mailbox" interrupt. Such device can be also instantiated using the Device Tree node with compatible property equal "virtio,mmio". Cc: Anthony Liguori <aliguori@us.ibm.com> Cc: Michael S.Tsirkin <mst@redhat.com> Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r--Documentation/devicetree/bindings/virtio/mmio.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/virtio/mmio.txt b/Documentation/devicetree/bindings/virtio/mmio.txt
new file mode 100644
index 000000000000..5069c1b8e193
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+++ b/Documentation/devicetree/bindings/virtio/mmio.txt
@@ -0,0 +1,17 @@
+* virtio memory mapped device
+
+See http://ozlabs.org/~rusty/virtio-spec/ for more details.
+
+Required properties:
+
+- compatible: "virtio,mmio" compatibility string
+- reg: control registers base address and size including configuration space
+- interrupts: interrupt generated by the device
+
+Example:
+
+ virtio_block@3000 {
+ compatible = "virtio,mmio";
+ reg = <0x3000 0x100>;
+ interrupts = <41>;
+ }