linux-toradex.git/drivers/char/hvc_vio.c, branch v2.6.32.45

hvc_console: Add init and exit to hvc_vio

2009-08-28T04:24:11+00:00

Trivial patch which adds the __init/__exit macros to the module_init/
module_exit functions of char/hvc_vio.c

Please have a look at the small patch and either pull it through
your tree, or please ack' it so Jiri can pull it through the trivial tree.

linux version 2.6.31-rc6 - linus git tree, Do 20. Aug 22:26:06 CEST 2009

Signed-off-by: Peter Huewe 
Signed-off-by: Benjamin Herrenschmidt

drivers/hvc: Add missing __devexit_p()

2009-06-16T04:15:44+00:00

The remove function uses __devexit, so the .remove assignment needs
__devexit_p() to fix a build error with hotplug disabled.

Signed-off-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Benjamin Herrenschmidt

drivers/hvc: Add missing of_node_put

2008-12-03T10:04:09+00:00

of_node_put is needed before discarding a value received from
of_find_node_by_name, e.g., in error handling code or when the device
node is no longer used.

The semantic match that catches the bug is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// 
@r exists@
local idexpression struct device_node *n;
position p1, p2;
statement S1,S2;
expression E,E1;
expression *ptr != NULL;
@@

(
if (!(n@p1 = of_find_node_by_name(...))) S1
|
n@p1 = of_find_node_by_name(...)
)
<... when != of_node_put(n)
    when != if (...) { <+... of_node_put(n) ...+> }
    when != true !n  || ...
    when != n = E
    when != E = n
if (!n || ...) S2
...>
(
  return \(0\|<+...n...+>\|ptr\);
|
return@p2 ...;
|
n = E1
|
E1 = n
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@

print "* file: %s of_find_node_by_name %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// 

Signed-off-by: Nicolas Palix 
Signed-off-by: Julia Lawall 
Acked-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

hvc_console: Add a hangup notifier for backends

2008-10-21T23:59:54+00:00

I have added a hangup notifier that can be used by hvc console
backends to handle a tty hangup. The default irq hangup notifier
calls the notifier_del_irq() for compatibility.

Acked-by: Christian Borntraeger 
Signed-off-by: Hendrik Brueckner 
Signed-off-by: Benjamin Herrenschmidt

hvc_console: rework setup to replace irq functions with callbacks

2008-07-25T02:06:06+00:00

This patch tries to change hvc_console to not use request_irq/free_irq if
the backend does not use irqs. This allows virtio_console to use hvc_console
without having a linker reference to request_irq/free_irq.

In addition, together with patch 2/3 it improves the performance for virtio
console input. (an earlier version of this patch was tested by Yajin on lguest)

The irq specific code is moved to hvc_irq.c and selected by the drivers that
use irqs (System p, System i, XEN).

I replaced "int irq" with the opaque "int data". The request_irq and
free_irq calls are replaced with notifier_add and notifier_del. I have also
changed the code a bit to call the notifier_add and notifier_del inside the
spinlock area as the callbacks are found via hp->ops.

Changes since last version:
o remove ifdef
o reintroduce "irq_requested" as "notified"
o cleanups, sparse..

I did not move the timer based polling into a separate polling scheme. I
played with several variants, but it seems we need to sleep/schedule in
a thread even for irq based consoles, as there are throttleing and buffer
size constraints.

I also kept hvc_struct defined in hvc_console.h so that hvc_irq.c can access
the irq_requested element.

Feedback is appreciated. virtio_console is currently the only available console
for kvm on s390. I plan to push this change as soon as all affected parties
agree on it. I would love to get test results from System p, Xen etc.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Rusty Russell

[POWERPC] Rename device_is_compatible to of_device_is_compatible

2007-05-07T10:31:14+00:00

for consistency with other Open Firmware interfaces (and Sparc).

This is just a straight replacement.

This leaves the compatibility define in place.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

[POWERPC] Rename get_property to of_get_property: partial drivers

2007-04-27T05:51:56+00:00

This does drivers/machintosh and the hvc code.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

Revert "[POWERPC] Rename get_property to of_get_property: drivers"

2007-04-26T12:24:31+00:00

This reverts commit d05c7a80cf39ae7d0f8d0c3e47c93d51fcd393d3,
which included changes which should go via other subsystem
maintainers.

[POWERPC] Rename get_property to of_get_property: drivers

2007-04-12T17:55:19+00:00

Signed-off-by: Stephen Rothwell 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] The two vio HVC backends clash

2006-09-25T03:30:51+00:00

Make sure only one of them actually registers as a driver.

Also, remove cast from get_property().

Signed-off-by: Stephen Rothwell