From: Minghao Xue <quic_mingxue@quicinc.com>
Date: Fri, 10 Jun 2022 08:58:27 +0000 (+0800)
Subject: virtio_mmio: add support to set IRQ of a virtio device as wakeup source
X-Git-Tag: v6.1-rc5~611^2~79
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=02213273f72a43bad3a8e9c18595a2c74ee487e8;p=platform%2Fkernel%2Flinux-starfive.git

virtio_mmio: add support to set IRQ of a virtio device as wakeup source

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>
Message-Id: <1654851507-13891-3-git-send-email-quic_mingxue@quicinc.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 083ff1e..945cb8f 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -487,6 +487,9 @@ 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;