trouble configuring the touchscreen driver for OMAP OSK 5912

Hello,

I have been trying to build the linux kernel for the omap osk 5912 with touchscreen option but it is not working. The OSK is connected to a Mistral QVLM display module.
I am using linux kernel version 2.6.18 along with the appropriate omap
patch patch-2.6.18-omap1. After applying the patch i use the following procedure.

make clean
make omap_osk_5912_defconfig
make menuconfig

I use the following link for reference
http://oskfordummies.hp.infoseek.co.jp/howto/touch.html

According to this refence document i have to enable the options

CONFIG_INPUT_EVDEV
CONFIG_INPUT_TOUCHSCREEN
CONFIG_TOUCHSCREEN_OMAP

i am not getting any option for CONFIG_TOUCHSCREEN_OMAP. Also while trying to enable the LCD i dont get an option for CONFIG_FB_OMAP_INTERNAL_LCDC.

here is the Input Device Drivers section of .config file generated after the 'make menuconfig' command.

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
CONFIG_KEYBOARD_OMAP=y
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
CONFIG_INPUT_TOUCHSCREEN=y
# CONFIG_TOUCHSCREEN_GUNZE is not set
# CONFIG_TOUCHSCREEN_ELO is not set
# CONFIG_TOUCHSCREEN_MTOUCH is not set
# CONFIG_TOUCHSCREEN_MK712 is not set
# CONFIG_INPUT_MISC is not set

#

The graphics support section of .config

#
# Graphics support
#
CONFIG_FIRMWARE_EDID=y
CONFIG_FB=y
# CONFIG_FB_CFB_FILLRECT is not set
# CONFIG_FB_CFB_COPYAREA is not set
# CONFIG_FB_CFB_IMAGEBLIT is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_VIRTUAL is not set
CONFIG_FB_OMAP=y
# CONFIG_FB_OMAP_LCDC_EXTERNAL is not set
# CONFIG_FB_OMAP_LCD_MIPID is not set
# CONFIG_FB_OMAP_BOOTLOADER_INIT is not set
CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE=2
# CONFIG_FB_OMAP_DMA_TUNE is not set

#

Still i continued with the following procedure and loaded the kernel using using tftp.

$ make
$ arm-linux-objcopy -O binary -R .note -R .comment -S
arch/arm/boot/compressed/vmlinux linux.bin
$ gzip -9 linux.bin
$ /usr/src/u-boot-1.1.6/tools/mkimage -A arm -O linux -T kernel -C gzip -a
0x10c08000 -e 0x10c08000 -n 'Linux Kernel Image' -d linux.bin.gz uImage.cc
$ cp uImage.cc /tftpboot/uImage.cc

The kernel boots correctly but when i run the command

cat /proc/bus/input/devices

nothing is displayed.

Is there anything i missed out when compiling the kernel? Plese help.

Abhishek Desai

I don't have my code handy right now, but if I remember correctly, in menuconfig you need to enable SPI. The touchscreen on the display module is an ADS7846 so you need to enable that touchscreen. If I remember correctly, you need to enable SPI support first before the ADS7846 shows up as an option under Touchscreens.

Steve K.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of [email protected]
Sent: Friday, February 16, 2007 12:20 AM
To: [email protected]
Subject: trouble configuring the touchscreen driver for OMAP OSK 5912

Hello,

I have been trying to build the linux kernel for the omap osk 5912 with touchscreen option but it is not working. The OSK is connected to a Mistral QVLM display module.
I am using linux kernel version 2.6.18 along with the appropriate omap
patch patch-2.6.18-omap1. After applying the patch i use the following procedure.

make clean
make omap_osk_5912_defconfig
make menuconfig

I use the following link for reference
http://oskfordummies.hp.infoseek.co.jp/howto/touch.html

According to this refence document i have to enable the options

CONFIG_INPUT_EVDEV
CONFIG_INPUT_TOUCHSCREEN
CONFIG_TOUCHSCREEN_OMAP

i am not getting any option for CONFIG_TOUCHSCREEN_OMAP. Also while trying
to enable the LCD i dont get an option for CONFIG_FB_OMAP_INTERNAL_LCDC.

here is the Input Device Drivers section of .config file generated after the 'make menuconfig' command.

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
CONFIG_KEYBOARD_OMAP=y
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
CONFIG_INPUT_TOUCHSCREEN=y
# CONFIG_TOUCHSCREEN_GUNZE is not set
# CONFIG_TOUCHSCREEN_ELO is not set
# CONFIG_TOUCHSCREEN_MTOUCH is not set
# CONFIG_TOUCHSCREEN_MK712 is not set
# CONFIG_INPUT_MISC is not set

#

The graphics support section of .config

#
# Graphics support
#
CONFIG_FIRMWARE_EDID=y
CONFIG_FB=y
# CONFIG_FB_CFB_FILLRECT is not set
# CONFIG_FB_CFB_COPYAREA is not set
# CONFIG_FB_CFB_IMAGEBLIT is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_VIRTUAL is not set
CONFIG_FB_OMAP=y
# CONFIG_FB_OMAP_LCDC_EXTERNAL is not set
# CONFIG_FB_OMAP_LCD_MIPID is not set
# CONFIG_FB_OMAP_BOOTLOADER_INIT is not set
CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE=2
# CONFIG_FB_OMAP_DMA_TUNE is not set

#

Still i continued with the following procedure and loaded the kernel using
using tftp.

$ make
$ arm-linux-objcopy -O binary -R .note -R .comment -S
arch/arm/boot/compressed/vmlinux linux.bin
$ gzip -9 linux.bin
$ /usr/src/u-boot-1.1.6/tools/mkimage -A arm -O linux -T kernel -C gzip
-a
0x10c08000 -e 0x10c08000 -n 'Linux Kernel Image' -d linux.bin.gz
uImage.cc
$ cp uImage.cc /tftpboot/uImage.cc

The kernel boots correctly but when i run the command

cat /proc/bus/input/devices

nothing is displayed.

Is there anything i missed out when compiling the kernel? Plese help.

Abhishek Desai

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Mistral QVLM display module at OSK works quite well for me. My config:

#
# SPI support
#
CONFIG_SPI=y
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
CONFIG_SPI_BITBANG=y
CONFIG_SPI_OMAP_UWIRE=y

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
...
CONFIG_KEYBOARD_OMAP=y
...
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_TOUCHSCREEN_ADS7846=y

Hth,

Dirk