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authorOleksandr Suvorov <oleksandr.suvorov@toradex.com>2020-08-06 15:29:32 +0300
committerOleksandr Suvorov <oleksandr.suvorov@toradex.com>2020-08-10 13:11:02 +0300
commit6ba70eb580167611f8a5b061a9552eba25b34d6c (patch)
treef8d15c2f161c8b305e8e4cdfd517e4a8a02575ce
parentf627f20a298d441b5d94ba4ab80a1121065f1f75 (diff)
colibri-imx8x: udev: add symlink to adc raw data
Create symlinks for each supported by Colibri iMX6 ADC channels, standardizing names as colibri-ainX, according to the Colibri signal names table. Related-to: ELB-2839 Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
-rw-r--r--recipes-core/udev/files/colibri-imx8x/99-toradex.rules1
-rwxr-xr-xrecipes-core/udev/files/colibri-imx8x/toradex-adc.sh21
2 files changed, 22 insertions, 0 deletions
diff --git a/recipes-core/udev/files/colibri-imx8x/99-toradex.rules b/recipes-core/udev/files/colibri-imx8x/99-toradex.rules
index b2ac268..e06fb5a 100644
--- a/recipes-core/udev/files/colibri-imx8x/99-toradex.rules
+++ b/recipes-core/udev/files/colibri-imx8x/99-toradex.rules
@@ -8,3 +8,4 @@ ACTION=="add", SUBSYSTEM=="spidev", KERNELS=="5a020000.lpspi", SYMLINK+="colibri
KERNEL=="mmcblk[0-9]", ENV{DEVTYPE}=="disk", KERNELS=="5b010000.usdhc", SYMLINK+="emmc"
KERNEL=="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", KERNELS=="5b010000.usdhc", SYMLINK+="emmc-boot%n"
KERNEL=="mmcblk[0-9]p[0-9]", ENV{DEVTYPE}=="partition", KERNELS=="5b010000.usdhc", SYMLINK+="emmc-part%n"
+SUBSYSTEM=="iio", KERNELS=="iio:device0", RUN+="/etc/udev/scripts/toradex-adc.sh"
diff --git a/recipes-core/udev/files/colibri-imx8x/toradex-adc.sh b/recipes-core/udev/files/colibri-imx8x/toradex-adc.sh
new file mode 100755
index 0000000..143dfea
--- /dev/null
+++ b/recipes-core/udev/files/colibri-imx8x/toradex-adc.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env sh
+#
+# Called from udev. Compatible to colibri-imx8x.
+#
+# Create/remove symlinks to/from the files with raw ain data.
+
+# Map the ADC lines:
+# colibri-ain{0..3} -> ADMA.ADC.IN{0,1,4,5}
+
+if [ "$ACTION" = "add" ]; then
+ ln -s "/sys$DEVPATH/in_voltage0_raw" /dev/colibri-ain0
+ ln -s "/sys$DEVPATH/in_voltage1_raw" /dev/colibri-ain1
+ ln -s "/sys$DEVPATH/in_voltage4_raw" /dev/colibri-ain2
+ ln -s "/sys$DEVPATH/in_voltage5_raw" /dev/colibri-ain3
+elif [ "$ACTION" = "remove" ]; then
+ rm -f /dev/colibri-ain0
+ rm -f /dev/colibri-ain1
+ rm -f /dev/colibri-ain2
+ rm -f /dev/colibri-ain3
+fi
+