linux-toradex.git/drivers/uio, branch v2.6.27.3

UIO: generic irq handling for some uio platform devices

2008-08-21T17:15:39+00:00

This is V3 of uio_pdrv_genirq.c, a platform driver for UIO with
generic IRQ handling code. This driver is very similar to the regular
UIO platform driver, but is only suitable for devices that are
connected to the interrupt controller using unique interrupt lines.

The uio_pdrv_genirq driver includes generic interrupt handling code
which disables the serviced interrupt in the interrupt controller
and makes the user space driver responsible for acknowledging the
interrupt in the device and reenabling the interrupt in the interrupt
controller.

Shared interrupts are not supported since the in-kernel interrupt
handler will disable the interrupt line in the interrupt controller,
and in a shared interrupt configuration this will stop other devices
from delivering interrupts.

Signed-off-by: Magnus Damm 
Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: uio_pdrv: fix license specification

2008-08-21T17:15:39+00:00

Thanks to Magnus Damm for pointing that out.

Signed-off-by: Uwe Kleine-König 
Cc: Magnus Damm 
Acked-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: uio_pdrv: fix memory leak

2008-08-21T17:15:38+00:00

Thanks to Magnus Damm for pointing that out.

Signed-off-by: Uwe Kleine-König 
Cc: Magnus Damm 
Acked-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: add generic UIO platform driver

2008-07-22T04:54:55+00:00

This patch adds a generic UIO platform driver. It eliminates the need for a
dedicated kernel module for simple platform devices. Users only need to
implement their irq handler in platform code and fill a struct uio_info
there. This helps avoiding code duplication as UIO platform drivers often
share a lot of common code.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: Add write function to allow irq masking

2008-07-22T04:54:55+00:00

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

UIO: fix UIO Kconfig dependencies

2008-07-22T04:54:53+00:00

ae210f188614bb3d1ee3f19c64e28e3cdd44877c introduced a big "if UIO"/"endif"
where all uio drivers are defined.  So know there is no need for them to
depend explicitly on UIO.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

Merge commit 'v2.6.26' into bkl-removal

2008-07-14T21:29:34+00:00

UIO: cdev lock_kernel() pushdown

2008-06-20T20:05:47+00:00

Signed-off-by: Jonathan Corbet

UIO: fix race in device_create

2008-05-20T20:31:55+00:00

There is a race from when a device is created with device_create() and
then the drvdata is set with a call to dev_set_drvdata() in which a
sysfs file could be open, yet the drvdata will be NULL, causing all
sorts of bad things to happen.

This patch fixes the problem by using the new function,
device_create_drvdata().

Cc: Kay Sievers 
Cc: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: hold a reference to the device's owner while the device is open

2008-04-20T02:10:18+00:00

Otherwise the device might just disappear while /dev/uioX is being used
which results in an Oops.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Hans J Koch 
Signed-off-by: Greg Kroah-Hartman