Skip to contentSkip to conversation

i.MX53 + MC34708 working setup?

DISCUSSION Stanislav Meduna 1 participant 1 message Apr 13, 2016

lore
Share & tools
lore
#0 lore raw

Hi,

before I start digging deeper: anyone got the MC34708 PMIC touchscreen driver working on an i.MX53 board (I am using a custom board with a TQMa53 module)?

First: the mc13783-ts input driver does not support the device tree so after changing to module_platform_driver_probe somewhere in 3.10 it is not going to get started. For now I reverted this driver to a 3.9 version to get back the module_init/exit.

This resulted in this driver starting and trying to do mc13xxx_adc_do_conversion every time the touchscreen is touched, so here the interrupts are processed as expected. mc13xxx_adc_do_conversion however times out in wait_for_completion_interruptible_timeout.

Trying to bluntly revert this code to 3.9 as well did not work, so I am not sure whether the code is the problem or the device tree which was changed for imx53-tqma53.dtsi as well (for example the 3.9 lists
interrupts = <6 8>; /* PDATA_DATA6, low active */
whereas the 4.4 has <6 4> high active).

I am using a 4.4 kernel with some ported TQ patches, none of them touching the PMIC.

If anyone has this setup (i.MX53 + MC34708, recent kernel) working, I would appreciate a pointer to the code.

Thanks

Signature · 1 line
                                 Stano