[PATCH 4/5] standard-headers: virtio-gpio protocol headers

[Enrico Weigelt, metux IT consult]

Introduce virtio-gpio protocol headers from Linux kernel.
(work in progress, not mainlined yet)

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
 include/standard-headers/linux/virtio_gpio.h | 39 ++++++++++++++++++++++++++++
 include/standard-headers/linux/virtio_ids.h  |  1 +
 2 files changed, 40 insertions(+)
 create mode 100644 include/standard-headers/linux/virtio_gpio.h

diff --git a/include/standard-headers/linux/virtio_gpio.h 
b/include/standard-headers/linux/virtio_gpio.h
new file mode 100644
index 0000000000..d1db0ef1fe
--- /dev/null
+++ b/include/standard-headers/linux/virtio_gpio.h
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#ifndef _LINUX_VIRTIO_GPIO_H
+#define _LINUX_VIRTIO_GPIO_H
+
+#include <linux/types.h>
+
+enum virtio_gpio_event_type {
+       // requests from quest to host
+       VIRTIO_GPIO_EV_GUEST_REQUEST            = 0x01, // ->request()
+       VIRTIO_GPIO_EV_GUEST_DIRECTION_INPUT    = 0x02, // ->direction_input()
+       VIRTIO_GPIO_EV_GUEST_DIRECTION_OUTPUT   = 0x03, // ->direction_output()
+       VIRTIO_GPIO_EV_GUEST_GET_DIRECTION      = 0x04, // ->get_direction()
+       VIRTIO_GPIO_EV_GUEST_GET_VALUE          = 0x05, // ->get_value()
+       VIRTIO_GPIO_EV_GUEST_SET_VALUE          = 0x06, // ->set_value()
+
+       // messages from host to guest
+       VIRTIO_GPIO_EV_HOST_LEVEL               = 0x11, // gpio state changed
+
+       /* mask bit set on host->guest reply */
+       VIRTIO_GPIO_EV_REPLY                    = 0xF000,
+};
+
+struct virtio_gpio_config {
+       __u8    version;
+       __u8    reserved0;
+       __u16   num_gpios;
+       __u32   names_size;
+       __u8    reserved1[24];
+       __u8    name[32];
+};
+
+struct virtio_gpio_event {
+       __le16 type;
+       __le16 pin;
+       __le32 value;
+};
+
+#endif /* _LINUX_VIRTIO_GPIO_H */
diff --git a/include/standard-headers/linux/virtio_ids.h 
b/include/standard-headers/linux/virtio_ids.h
index b052355ac7..053fe59c73 100644
--- a/include/standard-headers/linux/virtio_ids.h
+++ b/include/standard-headers/linux/virtio_ids.h
@@ -48,5 +48,6 @@
 #define VIRTIO_ID_FS           26 /* virtio filesystem */
 #define VIRTIO_ID_PMEM         27 /* virtio pmem */
 #define VIRTIO_ID_MAC80211_HWSIM 29 /* virtio mac80211-hwsim */
+#define VIRTIO_ID_GPIO          30 /* virtio GPIO */
 
 #endif /* _LINUX_VIRTIO_IDS_H */
-- 
2.11.0