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ASoC: Amstrad Delta: add info about the line discipline requirement to Kconfig help text

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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@tis.icnet.pl>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Janusz Krzysztofik 2009-10-24 00:06:48 +02:00 committed by Mark Brown
parent 02a06d3042
commit b214f11fb9
1 changed files with 12 additions and 1 deletions
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13
sound/soc/omap/Kconfig
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@ -21,7 +21,18 @@ config SND_OMAP_SOC_AMS_DELTA
select SND_OMAP_SOC_MCBSP
select SND_SOC_CX20442
help
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"
config SND_OMAP_SOC_OSK5912
tristate "SoC Audio support for omap osk5912"