Touch controller failed on TM7000B with A5D4-xplained board

Moderator: nferre

pitot
Posts: 6
Joined: Tue May 05, 2015 4:37 pm

Touch controller failed on TM7000B with A5D4-xplained board

Thu Jan 21, 2016 9:03 am

Hi, I upgraded my touch screen from TM7000 to TM7000B on my SAMA5D4-xplained board with Linux 3.18 kernel. The screen 'looks' good but 'touch' failed. TM7000 uses mXT768E Touch Controller, and TM7000B uses mXT640T. Should I modify dts file or somethings else? Please help!
pitot
Posts: 6
Joined: Tue May 05, 2015 4:37 pm

Re: Touch controller failed on TM7000B with A5D4-xplained bo

Fri Jan 22, 2016 4:02 am

And boot log says:

atmel_mxt_ts 0-004c: Must have reset GPIO to use regulator support
atmel_mxt_ts 0-004c: __mxt_read_reg: i2c transfer failed (-121)
atmel_mxt_ts 0-004c: mxt_bootloader_read: i2c recv failed (-121)
atmel_mxt_ts 0-004c: Trying alternate bootloader address
atmel_mxt_ts 0-004c: mxt_bootloader_read: i2c recv failed (-121)
atmel_mxt_ts: probe of 0-004c failed with error -121
nferre
Site Admin
Posts: 218
Joined: Wed Feb 14, 2007 11:17 am

Re: Touch controller failed on TM7000B with A5D4-xplained bo

Mon Jan 25, 2016 1:18 pm

Hi

PDA7000B are now integrated in our linux-4.1-at91 branch. You can find the commit here:
https://github.com/linux4sam/linux-at91 ... dbc33e5044

It's actually just a matter of different address on the maXTouch controller: now 0x4a.

Bye,
pitot
Posts: 6
Joined: Tue May 05, 2015 4:37 pm

Re: Touch controller failed on TM7000B with A5D4-xplained bo

Mon Mar 14, 2016 4:52 am

Thank you, nferre. I upgrade my linux to 4.1 and TM7000B works fine.

Return to “SAMA5-based”

Who is online

Users browsing this forum: No registered users and 2 guests