Re: [linux-sunxi] Re: GSL3680 thread

[Gregor Riepl]

> It fails before FW loading as below.
> 
> 
> Maybe you could do some testing with https://github.com/rastersoft/gsl1680
>  and
> see if you can get it working by skipping the GPIO stuff?
> 
> 
> I did a try with Joe's one (https://github.com/jabjoe/sunxi-gslx680) but it is
> failling with error
>
>  1. [   91.366514] incomplete xfer (0xff)
>  2. [   91.366532] reset_chip: gsl_ts_write 1 fail!
>  3. [   91.366541] init_chip: reset_chip fail: -70
>  4. [   91.366552] gslx680 1-0040: init_chip failed
> 
>  It seems it's due to I2C bus error and someone on LeMaker forum's pointed to
> me I have probably to switch to 400 khz bus.
>  Another thing I have to do, is to check to which GPIO SHUTDOWN pin is
> connected ... but for that, I need to tears down my device (no time yet : ski
> :) ).
> 
> But if I skip GPIO stuff, how the device will turn on loading phase ? Is
> writing to the device enough ?

If you're interested, there are two new drivers for Silead devices, one by
Robert Dolca (https://lkml.org/lkml/2015/8/25/738) and one by myself.
(https://github.com/onitake/gslx680-acpi) They are mainly intended for
ACPI-based platforms (i.e. Intel Baytrail tablets). I'm very interested in
getting either (or both) of them to work on DeviceTree as well, but this is
difficult without a device to test.

Do you have a DT in human-readable form available? Does it contain any
GPIO/IRQ configuration data for your device?

If you do not use power management, I think the device will respond after
powerup even without the GPIO. At least, I got that impression while working
with a GSL1680. However, if you want to enable power save, I'm pretty sure you
need the pin. Also, you definitely need the IRQ line, unless you want to poll
the chip.

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Re: [linux-sunxi] Re: GSL3680 thread

['destroyedlolo' via linux-sunxi]

Le lundi 25 janvier 2016 19:06:53 UTC+1, Gregor Riepl a écrit :
>
>
> According to the very limited knowledge I have about Silead controllers, 
> the 
> GSL3680 should have roughly the same interface as the GSL1680, even if it 
> doesn't have a control pin. That also applies to the firmware loading 
> process. 
> Are you sure you have the right firmware? 
>

It fails before FW loading as below.


> Maybe you could do some testing with https://github.com/rastersoft/gsl1680 
> and 
> see if you can get it working by skipping the GPIO stuff? 
>

I did a try with Joe's one (https://github.com/jabjoe/sunxi-gslx680) but it 
is failling with error

   1. [   91.366514] incomplete xfer (0xff)
   2. [   91.366532] reset_chip: gsl_ts_write 1 fail!
   3. [   91.366541] init_chip: reset_chip fail: -70
   4. [   91.366552] gslx680 1-0040: init_chip failed

 It seems it's due to I2C bus error and someone on LeMaker forum's pointed 
to me I have probably to switch to 400 khz bus.
 Another thing I have to do, is to check to which GPIO SHUTDOWN pin is 
connected ... but for that, I need to tears down my device (no time yet : 
ski :) ).

But if I skip GPIO stuff, how the device will turn on loading phase ? Is 
writing to the device enough ?

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Re: [linux-sunxi] Re: GSL3680 thread

[Gregor Riepl]

> The only information I found came from the datasheet I found on your site, I
> have translated using Google and some Chinese friends.
> Clearly, GSL1680's firmware loading procedure doesn't apply as the control pin
> doesn't exists.
> 
> So, for them moment, it's a dead end :(

According to the very limited knowledge I have about Silead controllers, the
GSL3680 should have roughly the same interface as the GSL1680, even if it
doesn't have a control pin. That also applies to the firmware loading process.
Are you sure you have the right firmware?

Maybe you could do some testing with https://github.com/rastersoft/gsl1680 and
see if you can get it working by skipping the GPIO stuff?

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Re: [linux-sunxi] Re: GSL3680 thread

[Priit Laes]

On Sat, 2016-01-23 at 03:19 -0800, 'destroyedlolo' via linux-sunxi
wrote:
> Thanks for your reply.
> 
> It's a Klipad HC-913 (http://linux-sunxi.org/MID-KLIPAD_HC-913).
> The only information I found came from the datasheet I found on your
> site, I have translated using Google and some Chinese friends.
> Clearly, GSL1680's firmware loading procedure doesn't apply as the
> control pin doesn't exists.

After some googling I ended up here. You could probably deduce the
firmware loading procedure from one of those drivers:

https://github.com/skelton/Amlogic_common_meson6/tree/master/customer/d
rivers/touchscreen
> 
> So, for them moment, it's a dead end :(
> 
> Bye
> 
> Laurent
> 
> Le samedi 23 janvier 2016 09:41:51 UTC+1, Priit Laes a écrit :
> > On Fri, 2016-01-22 at 12:45 -0800, 'destroyedlolo' via linux-sunxi 
> > wrote: 
> > > Unfortunately, I got no response from the manufacturer after a
> > week 
> > > ...  
> > > No one on this forum  having this doc ? 
> > 
> > Probably no, please add any information you have under Silead
> > section 
> > in our wiki: http://linux-sunxi.org/Touchscreen#Silead 
> > 
> > Also, what device do you have? 
> > 
> > 
> > Päikest, 
> > Priit Laes :) 
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Re: [linux-sunxi] Re: GSL3680 thread

[Priit Laes]

On Fri, 2016-01-22 at 12:45 -0800, 'destroyedlolo' via linux-sunxi
wrote:
> Unfortunately, I got no response from the manufacturer after a week
> ... 
> No one on this forum  having this doc ?

Probably no, please add any information you have under Silead section
in our wiki: http://linux-sunxi.org/Touchscreen#Silead

Also, what device do you have?


Päikest,
Priit Laes :)

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Re: [linux-sunxi] Re: GSL3680 thread

['destroyedlolo' via linux-sunxi]

Thanks for your reply.

It's a Klipad HC-913 (http://linux-sunxi.org/MID-KLIPAD_HC-913).
The only information I found came from the datasheet I found on your site, 
I have translated using Google and some Chinese friends.
Clearly, GSL1680's firmware loading procedure doesn't apply as the control 
pin doesn't exists.

So, for them moment, it's a dead end :(

Bye

Laurent

Le samedi 23 janvier 2016 09:41:51 UTC+1, Priit Laes a écrit :
>
> On Fri, 2016-01-22 at 12:45 -0800, 'destroyedlolo' via linux-sunxi 
> wrote: 
> > Unfortunately, I got no response from the manufacturer after a week 
> > ...  
> > No one on this forum  having this doc ? 
>
> Probably no, please add any information you have under Silead section 
> in our wiki: http://linux-sunxi.org/Touchscreen#Silead 
>
> Also, what device do you have? 
>
>
> Päikest, 
> Priit Laes :) 
>

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[linux-sunxi] Re: GSL3680 thread

['destroyedlolo' via linux-sunxi]

Unfortunately, I got no response from the manufacturer after a week ... 
No one on this forum  having this doc ?

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