diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2021-10-21 16:34:19 +0530 |
|---|---|---|
| committer | Bartosz Golaszewski <brgl@bgdev.pl> | 2021-11-04 16:34:29 +0100 |
| commit | eff5cdd745a68863a73095b0b4d62d15e0d9d902 (patch) | |
| tree | 05c7171fd0c5edb8d6f15c0457ed1bf424ff3b2b /include/uapi | |
| parent | 585a07079909ba9061ddd88214c36653e1aef71a (diff) | |
| download | linux-eff5cdd745a68863a73095b0b4d62d15e0d9d902.tar.gz linux-eff5cdd745a68863a73095b0b4d62d15e0d9d902.tar.bz2 linux-eff5cdd745a68863a73095b0b4d62d15e0d9d902.zip | |
gpio: virtio: Add IRQ support
This patch adds IRQ support for the virtio GPIO driver. Note that this
uses the irq_bus_lock/unlock() callbacks, since those operations over
virtio may sleep.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/virtio_gpio.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_gpio.h b/include/uapi/linux/virtio_gpio.h index 0445f905d8cc..d04af9c5f0de 100644 --- a/include/uapi/linux/virtio_gpio.h +++ b/include/uapi/linux/virtio_gpio.h @@ -5,12 +5,16 @@ #include <linux/types.h> +/* Virtio GPIO Feature bits */ +#define VIRTIO_GPIO_F_IRQ 0 + /* Virtio GPIO request types */ #define VIRTIO_GPIO_MSG_GET_NAMES 0x0001 #define VIRTIO_GPIO_MSG_GET_DIRECTION 0x0002 #define VIRTIO_GPIO_MSG_SET_DIRECTION 0x0003 #define VIRTIO_GPIO_MSG_GET_VALUE 0x0004 #define VIRTIO_GPIO_MSG_SET_VALUE 0x0005 +#define VIRTIO_GPIO_MSG_IRQ_TYPE 0x0006 /* Possible values of the status field */ #define VIRTIO_GPIO_STATUS_OK 0x0 @@ -21,6 +25,14 @@ #define VIRTIO_GPIO_DIRECTION_OUT 0x01 #define VIRTIO_GPIO_DIRECTION_IN 0x02 +/* Virtio GPIO IRQ types */ +#define VIRTIO_GPIO_IRQ_TYPE_NONE 0x00 +#define VIRTIO_GPIO_IRQ_TYPE_EDGE_RISING 0x01 +#define VIRTIO_GPIO_IRQ_TYPE_EDGE_FALLING 0x02 +#define VIRTIO_GPIO_IRQ_TYPE_EDGE_BOTH 0x03 +#define VIRTIO_GPIO_IRQ_TYPE_LEVEL_HIGH 0x04 +#define VIRTIO_GPIO_IRQ_TYPE_LEVEL_LOW 0x08 + struct virtio_gpio_config { __le16 ngpio; __u8 padding[2]; @@ -44,4 +56,17 @@ struct virtio_gpio_response_get_names { __u8 value[]; }; +/* Virtio GPIO IRQ Request / Response */ +struct virtio_gpio_irq_request { + __le16 gpio; +}; + +struct virtio_gpio_irq_response { + __u8 status; +}; + +/* Possible values of the interrupt status field */ +#define VIRTIO_GPIO_IRQ_STATUS_INVALID 0x0 +#define VIRTIO_GPIO_IRQ_STATUS_VALID 0x1 + #endif /* _LINUX_VIRTIO_GPIO_H */ |