flash the controller touchscreen Cypress TrueTouch TMA4XX about kernel HOT 4 CLOSED

First of all, use the latest 3.10 kernel: the PLATFORM_YUKON config option was available only in 3.4: that driver was buggy as hell, as well as the whole kernel.

First of all, a good disclaimer:
******* THIS IS A DANGEROUS PROCEDURE THAT MAY MAKE YOUR HARDWARE UNUSABLE. IF YOU DECIDE TO DO THIS, YOU ARE DOING THIS AT YOUR OWN RISK. NEITHER ME, SONY OR ANYONE WILL BE RESPONSIBLE FOR YOUR ACTIONS. THIS IS NOT A RECOMMENDED PROCEDURE AND HAS BEEN GUESSED (AND TESTED IN THE PAST) BY ME AND ONLY ME. **********

Then, we may proceed.

Enable the configuration option CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP4_BINARY_FW_UPGRADE in the kernel, recompile and flash.

• ALL THE OPERATIONS FROM NOW ON HAS TO BE DONE FROM A PHONE ROOT SHELL -

Put the firmware for CYTTSP4 (I took the one from Tianchi to recover my Seagull) in /system/etc/firmware. The firmware file has to be named "cyttsp4_loader.main_ttsp_core".
Write "1" to "manual_upgrade", found in cyttsp4 sysfs path.
Write "1" to "upgrade_now", found in the same path.
Check the upgrade by reading "upgrade_step", found in the same path.

If your touchscreen still doesn't work, then it's not a firmware problem: it's either a HW problem or you screwed up your CYTTSP4 TTCONFIG. To upgrade the configuration, you will need to first get a known good conf FOR YOUR SPECIFIC DEVICE, then you will need to enable the CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP4_MANUAL_TTCONFIG_UPGRADE and you will need to:

• Feed the new conf to the sysfs "config_data" (dd if=seagull_config of=/sys/xxxxxxxxx/config_data)
• Start the configuration upgrade by writing "1" to "config_loading" (same sysfs path).

By the way, messing with the touchscreen firmware is stupid!

Good luck!
-- Angelo G. Del Regno

from kernel.

kernel 3.10 and android 4.4 bootloop((

from kernel.

please flash the latest Sony official software instead of cross flashing the TS firmware

from kernel.

please flash the latest Sony official software
latest Sony official software it's android 4.4.4
To flash many times, it did not help

from kernel.