[alsa-devel] [PATCH] ASoC: Amstrad Delta: add info about the line discipline requirement to Kconfig help text
jkrzyszt at tis.icnet.pl
Sat Oct 24 00:06:48 CEST 2009
I thought it could be usefull to add some information on how to get the device
fully supported by loading a line discipline on the modem line.
Signed-off-by: Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>
As you could probably notice, I am not a native English, so please feel free
to correct my poor language if desired.
--- linux-2.6.32-rc5/sound/soc/omap/Kconfig.orig 2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5/sound/soc/omap/Kconfig 2009-10-24 00:01:26.000000000 +0200
@@ -21,7 +21,18 @@ config SND_OMAP_SOC_AMS_DELTA
- Say Y if you want to add support for SoC audio on Amstrad Delta.
+ Say Y if you want to add support for SoC audio device connected to
+ a handset and a speakerphone found on Amstrad E3 (Delta) videophone.
+ Note that in order to get those devices fully supported, you have to
+ build the kernel with standard serial port driver included and
+ configured for at least 4 ports. Then, from userspace, you must load
+ a line discipline #19 on the modem (ttyS3) serial line. The simplest
+ way to achieve this is to install util-linux-ng and use the included
+ ldattach utility. This can be started automatically from udev,
+ a simple rule like this one should do the trick (it does for me):
+ ACTION=="add", KERNEL=="controlC0", \
+ RUN+="/usr/sbin/ldattach 19 /dev/ttyS3"
tristate "SoC Audio support for omap osk5912"
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