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authorJanusz Krzysztofik <jkrzyszt@tis.icnet.pl>2009-10-24 00:06:48 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-10-25 18:10:59 +0100
commitb214f11fb92713fbb07d8c1f62dd1aa8077b56c9 (patch)
tree6de9922de9f6ed88e9050f27d3234fd4e39048e6 /sound/soc/omap/Kconfig
parentASoC: Fix possible codec_dai->ops NULL pointer problems (diff)
downloadlinux-b214f11fb92713fbb07d8c1f62dd1aa8077b56c9.tar.xz
linux-b214f11fb92713fbb07d8c1f62dd1aa8077b56c9.zip
ASoC: Amstrad Delta: add info about the line discipline requirement to Kconfig help text
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>
Diffstat (limited to 'sound/soc/omap/Kconfig')
-rw-r--r--sound/soc/omap/Kconfig13
1 files changed, 12 insertions, 1 deletions
diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index 2dee9839be86..653a362425df 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -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"