TSC2102 Linux driver
From ArmadeusWiki
This page details the installation and the usage of the Linux drivers for the TSC210x chips (touch & temp/voltage control). Sound (ALSA) specific part can be found here.
Contents
Driver Installation
These drivers are now installed by default in standard Armadeus rootfs. Here you will find instructions to know how we configured Linux to activate these drivers (may be useful if you want to deactivate them).
Architecture
| Touchscreen (tsc2102_ts.ko) | HWmon | ALSA |
|---|---|---|
| TSC210x Main (SPI) driver (tsc2102.ko) | ||
| Linux API | ||
Usage
- load all the needed drivers:
# modprobe tsc2102_ts TI TSC2102 driver initializing input: TSC2102 Touchscreen as /class/input/input0 TSC2102 touchscreen driver initialized
Touchscreen
Before use, the touchscreen has to be (at least one time) calibrated:
# ts_calibrate
Then it can be tested with:
# ts_test
If it does not work you can quickly check driver functionality; touch the screen and check that tsc2102 interrupts count is increasing:
# cat /proc/interrupts
CPU0
26: 0 MPU IMX-uart
29: 17 MPU IMX-uart
30: 22 MPU IMX-uart
35: 12 MPU imx-mmc
39: 14 MPU I2C_IMX
40: 16 MPU imx-spi.2
41: 0 MPU imx-spi.1
59: 3682 MPU i.MX Timer Tick
60: 0 MPU DMA
61: 0 MPU DMA
110: 0 GPIO eth0
168: 0 GPIO tsc2102 <<<<--------
Err: 0
#
Further information concerning the tslib can be found here
Audio
You can play sounds through ALSA interface.
Miscellaneous
- get temperature and voltage with hwmon (Hardware Monitoring) interface. For example, get board temperature from TSC210x:
# modprobe hwmon # cat /sys/class/hwmon/hwmon0/device/temp1_input -- result in m°C
