Difference between revisions of "TSC2102 Linux driver"

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(Remove duplicate tslib infos)
m (Driver Installation)
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==Driver Installation==
 
==Driver Installation==
  $ make linux-menuconfig
+
  $ make linux26-menuconfig
  
 
  in '''Device Drivers  ---> Input device support  --->''' select '''<*>  Event interface'''  as builtin
 
  in '''Device Drivers  ---> Input device support  --->''' select '''<*>  Event interface'''  as builtin
Line 12: Line 12:
 
  in '''Device Drivers  --->''' select '''<M> Hardware Monitoring support  --->''' as module
 
  in '''Device Drivers  --->''' select '''<M> Hardware Monitoring support  --->''' as module
  
  $ make linux
+
  $ make
  
 
Then reflash your Linux kernel and your Rootfs...
 
Then reflash your Linux kernel and your Rootfs...

Revision as of 19:15, 6 December 2008

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

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

Links