Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751497AbcLEDzo (ORCPT ); Sun, 4 Dec 2016 22:55:44 -0500 Received: from fllnx209.ext.ti.com ([198.47.19.16]:37800 "EHLO fllnx209.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751168AbcLEDzl (ORCPT ); Sun, 4 Dec 2016 22:55:41 -0500 Subject: Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix ti,charge-delay to represent in nS To: Dmitry Torokhov References: <20161110163515.27598-1-mugunthanvnm@ti.com> <71482721-fd60-65b2-d601-f1698ce5fa0a@ti.com> <20161125095918.GZ10134@dell.home> <8b97b7e6-1ea4-bf13-7da5-55135a994231@ti.com> <20161129210949.GB20680@dtor-ws> CC: Lee Jones , , Jonathan Cameron , Rob Herring , Mark Rutland , Sekhar Nori , Vignesh R , , , From: Mugunthan V N Message-ID: Date: Mon, 5 Dec 2016 09:24:57 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <20161129210949.GB20680@dtor-ws> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1720 Lines: 49 Hi Lee Jones On Wednesday 30 November 2016 02:39 AM, Dmitry Torokhov wrote: > 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. > A gentle ping Regards Mugunthan V N