[PATCH v2 2/2] virtio_mmio: add support to set IRQ of a virtio device as wakeup source

[PATCH v2 2/2] virtio_mmio: add support to set IRQ of a virtio device as wakeup source

[Minghao Xue]

According to virtio_mmio wakeup flag in device trees, set its IRQ
as wakeup source in virtqueue initialization.

Signed-off-by: Minghao Xue <quic_mingxue@quicinc.com>
---
v1 -> v2: rename property from "virtio,wakeup" to "wakeup-source"

 drivers/virtio/virtio_mmio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 56128b9..6637d85 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -474,6 +474,9 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
 	if (err)
 		return err;
 
+	if (of_property_read_bool(vm_dev->pdev->dev.of_node, "wakeup-source"))
+		enable_irq_wake(irq);
+
 	for (i = 0; i < nvqs; ++i) {
 		if (!names[i]) {
 			vqs[i] = NULL;
-- 
2.7.4

[PATCH v2 0/2] virtio_mmio: add support to set IRQ of a virtio device as wakeup source

[Minghao Xue]

Hi,
Some systems want to set the interrupt of virtio_mmio device as a wakeup source of system.
This patch series add support for such use case. And it can be enbaled by adding "wakeup-source" property to the device tree.

Patch 1: Add an optional "wakeup-source" property into binding file of virtio_mmio device.
Patch 2: Set IRQ of virtio_mmio device as wakeup source in virtqueue initialization, if "wakeup-source" is set in the device tree.

Version 2 changes (mostly feedback from Krzysztof Kozlowski)
-rename property from "virtio,wakeup" to "wakeup-source"

Minghao Xue (2):
  dt-bindings: virtio: mmio: add optional wakeup-source property
  virtio_mmio: add support to set IRQ of a virtio device as wakeup
    source

 Documentation/devicetree/bindings/virtio/mmio.yaml | 4 ++++
 drivers/virtio/virtio_mmio.c                       | 3 +++
 2 files changed, 7 insertions(+)

-- 
2.7.4

[PATCH v2 2/2] virtio_mmio: add support to set IRQ of a virtio device as wakeup source

[Minghao Xue]

According to virtio_mmio wakeup flag in device trees, set its IRQ
as wakeup source in virtqueue initialization.

Signed-off-by: Minghao Xue <quic_mingxue@quicinc.com>
---
 drivers/virtio/virtio_mmio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index f9a36bc..c144442 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -486,6 +486,9 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
 	if (err)
 		return err;
 
+	if (of_property_read_bool(vm_dev->pdev->dev.of_node, "wakeup-source"))
+		enable_irq_wake(irq);
+
 	for (i = 0; i < nvqs; ++i) {
 		if (!names[i]) {
 			vqs[i] = NULL;
-- 
2.7.4