diff options
| author | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2020-08-06 16:35:29 +0300 |
|---|---|---|
| committer | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2020-08-10 13:11:02 +0300 |
| commit | a98861ebc9d2a26f458a57f674b53cb81405da64 (patch) | |
| tree | 29f2fceb7ec304d8d2966c172be8bc15730b4dd8 | |
| parent | 41ebdf6d19a1b8af2e06f274d711823bdb345f29 (diff) | |
apalis-imx8: udev: add symlink to adc raw data
Create symlinks for each supported by Apalis iMX8 ADC channels,
standardizing names as apalis-adcX, according to the Apalis signal names
table.
Related-to: ELB-2839
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
| -rw-r--r-- | recipes-core/udev/files/apalis-imx8/99-toradex.rules | 1 | ||||
| -rwxr-xr-x | recipes-core/udev/files/apalis-imx8/toradex-adc.sh | 21 |
2 files changed, 22 insertions, 0 deletions
diff --git a/recipes-core/udev/files/apalis-imx8/99-toradex.rules b/recipes-core/udev/files/apalis-imx8/99-toradex.rules index 2c62b6c..994fce7 100644 --- a/recipes-core/udev/files/apalis-imx8/99-toradex.rules +++ b/recipes-core/udev/files/apalis-imx8/99-toradex.rules @@ -11,3 +11,4 @@ ACTION=="add", SUBSYSTEM=="spidev", KERNELS=="5a020000.lpspi", SYMLINK+="apalis- 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/apalis-imx8/toradex-adc.sh b/recipes-core/udev/files/apalis-imx8/toradex-adc.sh new file mode 100755 index 0000000..fdc5365 --- /dev/null +++ b/recipes-core/udev/files/apalis-imx8/toradex-adc.sh @@ -0,0 +1,21 @@ +#!/usr/bin/env sh +# +# Called from udev. Compatible to apalis-imx8. +# +# Create/remove symlinks to/from the files with raw ain data. + +# Map the ADC lines: +# apalis-adc{0..3} -> DMA.ADC.IN{0,1,2,3} +LINES=4 +START=0 + +if [ "$ACTION" = "add" ]; then + for idx in `seq 0 $((LINES-1))`; do + ln -s "/sys$DEVPATH/in_voltage$((START+idx))_raw" /dev/apalis-ain$idx + done +elif [ "$ACTION" = "remove" ]; then + for idx in `seq 0 $((LINES-1))`; do + rm -f /dev/apalis-ain$idx + done +fi + |