From 328a14e70e7f46997cb50d4258dd93d5377f98c6 Mon Sep 17 00:00:00 2001 From: "Hans J. Koch" Date: Fri, 23 May 2008 13:50:14 +0200 Subject: UIO: Add write function to allow irq masking MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sometimes it is necessary to enable/disable the interrupt of a UIO device from the userspace part of the driver. With this patch, the UIO kernel driver can implement an "irqcontrol()" function that does this. Userspace can write an s32 value to /dev/uioX (usually 0 or 1 to turn the irq off or on). The UIO core will then call the driver's irqcontrol function. Signed-off-by: Hans J. Koch Acked-by: Uwe Kleine-König Acked-by: Magnus Damm Signed-off-by: Greg Kroah-Hartman --- include/linux/uio_driver.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/uio_driver.h') diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index 973386d439da..cf65e964102b 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -53,6 +53,7 @@ struct uio_device; * @mmap: mmap operation for this uio device * @open: open operation for this uio device * @release: release operation for this uio device + * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX */ struct uio_info { struct uio_device *uio_dev; @@ -66,6 +67,7 @@ struct uio_info { int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); int (*open)(struct uio_info *info, struct inode *inode); int (*release)(struct uio_info *info, struct inode *inode); + int (*irqcontrol)(struct uio_info *info, s32 irq_on); }; extern int __must_check -- cgit v1.2.2 From 6d8333c24d41637f0f847f6e17032189dae08c02 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Tue, 10 Jun 2008 09:14:48 +0200 Subject: UIO: minor style and comment fixes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König Signed-off-by: Hans J. Koch --- include/linux/uio_driver.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux/uio_driver.h') diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index cf65e964102b..cdf338d94b7f 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -36,7 +36,7 @@ struct uio_mem { struct uio_map *map; }; -#define MAX_UIO_MAPS 5 +#define MAX_UIO_MAPS 5 struct uio_device; @@ -82,11 +82,11 @@ static inline int __must_check extern void uio_unregister_device(struct uio_info *info); extern void uio_event_notify(struct uio_info *info); -/* defines for uio_device->irq */ +/* defines for uio_info->irq */ #define UIO_IRQ_CUSTOM -1 #define UIO_IRQ_NONE -2 -/* defines for uio_device->memtype */ +/* defines for uio_mem->memtype */ #define UIO_MEM_NONE 0 #define UIO_MEM_PHYS 1 #define UIO_MEM_LOGICAL 2 -- cgit v1.2.2