* [Buildroot] [PATCH] Add ttyO devices to the mdev configuration and the static device table.
@ 2012-01-01 17:26 Frank Hunleth
2012-01-01 20:50 ` Thomas Petazzoni
0 siblings, 1 reply; 4+ messages in thread
From: Frank Hunleth @ 2012-01-01 17:26 UTC (permalink / raw)
To: buildroot
These are needed to support the serial ports on OMAP/AM335x devices
such as the BeagleBone.
Signed-off-by: Frank Hunleth <fhunleth@troodon-software.com>
---
package/busybox/mdev.conf | 1 +
target/generic/device_table_dev.txt | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/package/busybox/mdev.conf b/package/busybox/mdev.conf
index 247c0ed..7fb71bc 100644
--- a/package/busybox/mdev.conf
+++ b/package/busybox/mdev.conf
@@ -20,6 +20,7 @@ tty root:tty 666
tty[0-9]* root:tty 660
vcsa*[0-9]* root:tty 660
ttyS[0-9]* root:root 660
+ttyO[0-9]* root:root 660
# alsa sound devices
pcm.* root:audio 660 =snd/
diff --git a/target/generic/device_table_dev.txt b/target/generic/device_table_dev.txt
index 71cd083..b02963e 100644
--- a/target/generic/device_table_dev.txt
+++ b/target/generic/device_table_dev.txt
@@ -24,6 +24,7 @@
/dev/ptmx c 666 0 0 5 2 - - -
/dev/ttyP c 666 0 0 57 0 0 1 4
/dev/ttyS c 666 0 0 4 64 0 1 4
+/dev/ttyO c 666 0 0 253 0 0 1 4
/dev/fb c 640 0 5 29 0 0 1 4
#/dev/ttySA c 666 0 0 204 5 0 1 3
/dev/psaux c 666 0 0 10 1 0 0 -
--
1.7.0.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH] Add ttyO devices to the mdev configuration and the static device table.
2012-01-01 17:26 [Buildroot] [PATCH] Add ttyO devices to the mdev configuration and the static device table Frank Hunleth
@ 2012-01-01 20:50 ` Thomas Petazzoni
2012-01-02 1:03 ` Frank Hunleth
0 siblings, 1 reply; 4+ messages in thread
From: Thomas Petazzoni @ 2012-01-01 20:50 UTC (permalink / raw)
To: buildroot
Hello Frank,
Le Sun, 1 Jan 2012 12:26:36 -0500,
Frank Hunleth <fhunleth@troodon-software.com> a ?crit :
> +/dev/ttyO c 666 0 0 253 0 0 1 4
Unfortunately, this does not work. The omap-serial driver does not
define its major number, its gets allocated by alloc_chrdev_region()
dynamically at runtime. Therefore, depending on the drivers that are
compiled into the kernel and their initialization order, the major
number of the omap-serial devices might be 253 or 252 or 251, etc.
Basically, with the omap-serial driver, there is no other choice than
using devtmpfs (optionally with mdev or udev).
Best regards,
Thomas Petazzoni
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH] Add ttyO devices to the mdev configuration and the static device table.
2012-01-01 20:50 ` Thomas Petazzoni
@ 2012-01-02 1:03 ` Frank Hunleth
2012-01-02 7:44 ` Thomas Petazzoni
0 siblings, 1 reply; 4+ messages in thread
From: Frank Hunleth @ 2012-01-02 1:03 UTC (permalink / raw)
To: buildroot
Got it. That makes sense.
What about the other part of the patch for adding ttyO to mdev.conf? That
one is more important to me since I am currently using mdev (and probably
shouldn't have tried to cram the static dev table change in the patch
anyway).
Thanks,
Frank
On Sun, Jan 1, 2012 at 3:50 PM, Thomas Petazzoni <
thomas.petazzoni@free-electrons.com> wrote:
> Hello Frank,
>
> Le Sun, 1 Jan 2012 12:26:36 -0500,
> Frank Hunleth <fhunleth@troodon-software.com> a ?crit :
>
> > +/dev/ttyO c 666 0 0 253 0 0 1
> 4
>
> Unfortunately, this does not work. The omap-serial driver does not
> define its major number, its gets allocated by alloc_chrdev_region()
> dynamically at runtime. Therefore, depending on the drivers that are
> compiled into the kernel and their initialization order, the major
> number of the omap-serial devices might be 253 or 252 or 251, etc.
>
> Basically, with the omap-serial driver, there is no other choice than
> using devtmpfs (optionally with mdev or udev).
>
> Best regards,
>
> Thomas Petazzoni
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
--
Frank Hunleth
Troodon Software LLC
240.397.8766 | fhunleth at troodon-software.com
http://troodon-software.com/
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^ permalink raw reply [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH] Add ttyO devices to the mdev configuration and the static device table.
2012-01-02 1:03 ` Frank Hunleth
@ 2012-01-02 7:44 ` Thomas Petazzoni
0 siblings, 0 replies; 4+ messages in thread
From: Thomas Petazzoni @ 2012-01-02 7:44 UTC (permalink / raw)
To: buildroot
Le Sun, 1 Jan 2012 20:03:04 -0500,
Frank Hunleth <fhunleth@troodon-software.com> a ?crit :
> Got it. That makes sense.
>
> What about the other part of the patch for adding ttyO to mdev.conf? That
> one is more important to me since I am currently using mdev (and probably
> shouldn't have tried to cram the static dev table change in the patch
> anyway).
That part of the patch makes sense. Can you submit it separately?
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-01-01 17:26 [Buildroot] [PATCH] Add ttyO devices to the mdev configuration and the static device table Frank Hunleth
2012-01-01 20:50 ` Thomas Petazzoni
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2012-01-02 7:44 ` Thomas Petazzoni
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