Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix ti,charge-delay to represent in nS

From	Dmitry Torokhov <dmitry.torokhov@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix ti,charge-delay to represent in nS
Date	2016-11-29 22:20 +0100
Message-ID	<sIXYJ-5kl-17@gated-at.bofh.it> (permalink)
References	<sC0I1-h7-3@gated-at.bofh.it> <sHgM9-4kp-7@gated-at.bofh.it> <sHlsu-7lD-19@gated-at.bofh.it> <sIJsK-49m-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Nov 29, 2016 at 11:11:35AM +0530, Mugunthan V N wrote:
> On Friday 25 November 2016 03:29 PM, Lee Jones wrote:
> > On Fri, 25 Nov 2016, Mugunthan V N wrote:
> > 
> >> Hi Dmitry Torokhov,
> >>
> >> On Thursday 10 November 2016 10:05 PM, Mugunthan V N wrote:
> >>> This patch series enables ADC to be clocked at 24MHz as the
> >>> TI AM335x ADC driver has already adopted to use DMA to transfer
> >>> ADC samples. Now ADC can generated upto 800K Samples per second
> >>> with the patch [1] on AM335x BBB and AM437x GP EVM.
> >>>
> >>> when ADC ref clock is set at 24MHz, I am seeing some issue with
> >>> touch screen pointer as the pointer jumps to random locations
> >>> with free draw application. The issue is due to increase in ADC
> >>> clock and charge delay for the touchscreen ADC line duration
> >>> reduced.
> >>>
> >>> So the notation of ti,charge-delay in terms of ADC clock is
> >>> wrong, it has to be represented in time and driver has to convert
> >>> the charge delay time to ADC clocks based on what ADC clock
> >>> frequency is set.
> >>>
> >>> Measured the performance with the iio_generic_buffer with the
> >>> patch [2] applied
> >>>
> >>> Verified the touch screen on AM335x GP EVM and AM335x BBB LCD7
> >>> cape with [3] dts for display and touch screen to work.
> >>>
> >>
> >> Since there are acks from DT and MFD maintainers, can you pull the patch
> >> series if you do not have any more comments.
> > 
> > Cant do anything without *all* Acks.
> > 
> Hi Dmitry Torokhov,
> 
> Can you provide your inputs on the patch series.

You have my ack for the input bit.

-- 
Dmitry

Thread

Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix  ti,charge-delay to represent in nS Lee Jones <lee.jones@linaro.org> - 2016-11-25 11:00 +0100
  Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix  ti,charge-delay to represent in nS Mugunthan V N <mugunthanvnm@ti.com> - 2016-11-29 06:50 +0100
    Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix  ti,charge-delay to represent in nS Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-11-29 22:20 +0100
      Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix  ti,charge-delay to represent in nS Mugunthan V N <mugunthanvnm@ti.com> - 2016-12-05 05:00 +0100

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