linux-kernel - [PATCH] virtio_mmio: add ACPI probing

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Message-Id: <1438076642-12080-1-git-send-email-graeme.gregory@linaro.org>
Date:	Tue, 28 Jul 2015 10:44:02 +0100
From:	Graeme Gregory <graeme.gregory@...aro.org>
To:	virtualization@...ts.linux-foundation.org
Cc:	mst@...hat.com, linux-kernel@...r.kernel.org,
	Graeme Gregory <graeme.gregory@...aro.org>
Subject: [PATCH] virtio_mmio: add ACPI probing

Added the match table and pointers for ACPI probing to the driver.

This uses the same identifier for virt devices as being used for qemu
ARM64 ACPI support.

http://git.linaro.org/people/shannon.zhao/qemu.git/commit/d0bf1955a3ecbab4b51d46f8c5dda02b7e14a17e

Signed-off-by: Graeme Gregory <graeme.gregory@...aro.org>
---
 drivers/virtio/virtio_mmio.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 10189b5..f499d9d 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -58,6 +58,7 @@
 
 #define pr_fmt(fmt) "virtio-mmio: " fmt
 
+#include <linux/acpi.h>
 #include <linux/highmem.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -732,12 +733,21 @@ static struct of_device_id virtio_mmio_match[] = {
 };
 MODULE_DEVICE_TABLE(of, virtio_mmio_match);
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id virtio_mmio_acpi_match[] = {
+	{ "LNRO0005", },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, virtio_mmio_acpi_match);
+#endif
+
 static struct platform_driver virtio_mmio_driver = {
 	.probe		= virtio_mmio_probe,
 	.remove		= virtio_mmio_remove,
 	.driver		= {
 		.name	= "virtio-mmio",
 		.of_match_table	= virtio_mmio_match,
+		.acpi_match_table = ACPI_PTR(virtio_mmio_acpi_match),
 	},
 };
 
-- 
2.1.4

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