TSC2102 Linux driver
From ArmadeusWiki
This page details the installation and the usage of the Linux drivers for the TSC2102 touchscreen & sound chip. Sound (ALSA) specific part can be found here.
Driver Installation
$ make linux26-menuconfig
in Device Drivers ---> Input device support ---> select <*> Event interface as builtin in Device Drivers ---> Input device support ---> [*] Touchscreens ---> select <M> TSC 2102 based touchscreens as module in Device Drivers ---> SPI support ---> select <M> Freescale iMX SPI controller as module in Device Drivers ---> SPI support ---> --- TSC2102 codec support should be selected in Device Drivers ---> select <M> Hardware Monitoring support ---> as module
$ make
Then reflash your Linux kernel and your Rootfs...
Architecture
| Touchscreen (tsc2102_ts.ko) | HWmon | ALSA |
|---|---|---|
| TSC2102 Main driver (tsc2102.ko) | ||
| Linux API | ||
Usage
- load all the needed drivers:
# modprobe spi_imx # modprobe tsc2102_ts TI TSC2102 driver initializing input: TSC2102 Touchscreen as /class/input/input0 TSC2102 touchscreen driver initialized
- To check:
# lsmod Module Size Used by Not tainted tsc2102_ts 1188 0 tsc2102 10192 3 tsc2102_ts hwmon 916 1 tsc2102 spi_imx 7136 0
Then, you can:
- get temperature and voltage with hwmon (Hardware Monitoring) interface. For example:
# cat /sys/class/hwmon/hwmon0/device/temp1_input -- result in m°C
- play sounds through ALSA interface
- use touchscreen with Tslib
Quick test
To quickly check driver fonctionnality, 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
#
then, after having configured Tslib, start the touchscreen calibration tool:
# /usr/bin/ts_calibrate
