Re: [linux-sunxi] When does the I2C probe function get called

[Dave McLaughlin]

Hi Oliver,

I finally got it working this weekend and posted the results on my blog.

I had to add some code to the Fusion driver to pass back detection state 
and also make changes to use the AllWinner GPIO drivers and read the 
sysconfig.fex during init.

There was also a bug in the eint driver that displayed a handler failure 
even though the correct value was passed back. It was an easy fix.

I now have a working 7" cap touch display but missing a few things. Pinch 
to zoom isn't working yet although the driver does pass 2 touches to the 
kernel. Also the pulldown from the top isn't working with 1 finger right 
now. Seems to only respond if 2 are used.

Even though I have this working for Android, as the driver is actually part 
of the Linux kernel it should actually work with an Linux system too.

Dave...

On Sunday, 23 March 2014 18:15:46 UTC+7, Olliver Schinagl wrote:
>
> Touch screens are very fidgity to get working right, often due to some 
> firmware that needs to be loaded, or is different between various 
> implentations of the touchscreen IC. 
>
> I personally haven't seen the fusion series pass by the mailing list ... 
>
> Olliver 
>
>

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Re: [linux-sunxi] When does the I2C probe function get called

[Olliver Schinagl]

On 03/21/2014 04:10 PM, Dave McLaughlin wrote:

I am trying to port a touchscreen driver to my system and I have the
module building and installing.

I have added it to the auto detect code in device.c and I can see in
dmesg that the driver from i2c-core gets detected and the init function
is called.

What never gets called is the probe function which would setup the touch
IC and the interrupt handler.

When would this be called or how do I ensure this is called for my module?


This is the driver I am trying to use. It's under documents and
downloads. The manual explains how to integrate it except that the
information on page 7, 2.2 BSP Integration, section 2.2.2 does not match
up with anything I can find in the sun7i build.

http://www.touchrev.com/docs/fusion7/

Where in the sunxi build do I include this information or is this what's
in the sys_config.fex?

[ctp_para]
ctp_used = 1
ctp_name = "fusion_F0710A"
ctp_twi_id = 2
ctp_twi_addr = 0x10
ctp_screen_max_x = 800
ctp_screen_max_y = 480
ctp_revert_x_flag = 0
ctp_revert_y_flag = 0
ctp_exchange_x_y_flag = 0
ctp_int_port = port:PC19<6><1>
ctp_wakeup = port:PB13<1>


Touch screens are very fidgity to get working right, often due to some 
firmware that needs to be loaded, or is different between various 
implentations of the touchscreen IC.


I personally haven't seen the fusion series pass by the mailing list ...

Olliver


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[linux-sunxi] When does the I2C probe function get called

[Dave McLaughlin]

I am trying to port a touchscreen driver to my system and I have the module 
building and installing.

I have added it to the auto detect code in device.c and I can see in dmesg 
that the driver from i2c-core gets detected and the init function is 
called. 

What never gets called is the probe function which would setup the touch IC 
and the interrupt handler.

When would this be called or how do I ensure this is called for my module?


This is the driver I am trying to use. It's under documents and downloads. 
The manual explains how to integrate it except that the information on page 
7, 2.2 BSP Integration, section 2.2.2 does not match up with anything I can 
find in the sun7i build.

http://www.touchrev.com/docs/fusion7/

Where in the sunxi build do I include this information or is this what's in 
the sys_config.fex? 

[ctp_para]
ctp_used = 1
ctp_name = "fusion_F0710A"
ctp_twi_id = 2
ctp_twi_addr = 0x10
ctp_screen_max_x = 800
ctp_screen_max_y = 480
ctp_revert_x_flag = 0
ctp_revert_y_flag = 0
ctp_exchange_x_y_flag = 0
ctp_int_port = port:PC19<6><1>
ctp_wakeup = port:PB13<1>

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