From 8a3cdd45a73849eff3b9447f8e4cabc6a3218881 Mon Sep 17 00:00:00 2001
From: Minghao Xue <mingxue@codeaurora.org>
Date: Thu, 10 Sep 2020 17:11:16 +0800
Subject: [PATCH] virtio_mmio: add support to set a virtio device as wakeup
 source

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

Change-Id: Id861bf10d475c66bcb343dbbb01ba143338dd18c
Signed-off-by: Minghao Xue <mingxue@codeaurora.org>
---
 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 e09edb5c5e06..87ba0872d6b0 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -476,6 +476,9 @@ 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, "virtio,wakeup"))
+		enable_irq_wake(irq);
+
 	for (i = 0; i < nvqs; ++i) {
 		if (!names[i]) {
 			vqs[i] = NULL;