>
>My concern with trying to do the address selection without RST line is
>that it is quite unreliable, as it really depends on timings between the
>chip reset, INT line being driven by the host and then being switched to
>input.
I think you are right. thinking twice I should be able to fake the
On Mon, Jan 07, 2019 at 04:42:26PM +, Gonzalez, Alex wrote:
> Hi Bastien,
>
> >Given that we do have access to the datasheet, it would also be useful
> >for the patch to mention where in the datasheet it says that the reset
> >line can be left pulled-up,
>
> The pin description table on
>
>If it doesn't work with the vendor code, then we might not want to make
>it work with our driver either.
>
Thanks Bastien. The vendor code does seem to require both INT and RESET gpios.
Hi Bastien,
>Given that we do have access to the datasheet, it would also be useful
>for the patch to mention where in the datasheet it says that the reset
>line can be left pulled-up,
The pin description table on section 4, on the "Reset pin" row, contains a
remark as follows:
External 10K
On Mon, 2019-01-07 at 16:56 +0100, Bastien Nocera wrote:
> Given that we do have access to the datasheet, it would also be
> useful
> for the patch to mention where in the datasheet it says that the
> reset
> line can be left pulled-up, or mention on which shipping device this
> setup is already
On Sat, 2019-01-05 at 22:51 +, Dmitry Torokhov wrote:
> Hi Alex,
>
> On Fri, Jan 04, 2019 at 05:00:48PM +0100, Alex Gonzalez wrote:
> > The Goodix touch controller allows the use of two optional GPIOs
> > (RESET
> > and INT) to reset the touch controller, select the I2C address of
> > the
> >
Hi Dmitry,
Thanks for your quick reply.
>
>I do not have a datasheet for the device, so I am not sure if reset line
>is actually needed to put the device into sleep mode. As far as I can
>see from the code we suspend it by pulsing INT line and then sending a
>command to the controller, and
Hi Alex,
On Fri, Jan 04, 2019 at 05:00:48PM +0100, Alex Gonzalez wrote:
> The Goodix touch controller allows the use of two optional GPIOs (RESET
> and INT) to reset the touch controller, select the I2C address of the
> device and exit the device from sleep mode.
>
> The current implementation
> Designs that only provide the INT line are able to operate the touch on
> the default I2C address but will not be able to reset the touch via
> software or place the device in sleep mode.
This sounds exactly like the problem I'm having with the One-Mix Yoga
2 I described a few days ago.
I
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