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. Regards Mugunthan V N -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
