linux-kernel - Re: [PATCH v4 3/6] mfd: ti_am335x_tscadc: Remove unwanted reg_se

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Date:	Fri, 21 Nov 2014 17:40:12 +0530
From:	Sekhar Nori <nsekhar@...com>
To:	Richard Cochran <richardcochran@...il.com>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Lee Jones <lee.jones@...aro.org>, Vignesh R <vigneshr@...com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Benoit Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	Jonathan Cameron <jic23@...nel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Felipe Balbi <balbi@...com>, Brad Griffis <bgriffis@...com>,
	Sanjeev Sharma <sanjeev_sharma@...tor.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Jan Kardell <jan.kardell@...liq.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-iio@...r.kernel.org>, <linux-input@...r.kernel.org>,
	Robert Nelson <robertcnelson@...il.com>
Subject: Re: [PATCH v4 3/6] mfd: ti_am335x_tscadc: Remove unwanted reg_se_cache
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On Thursday 20 November 2014 08:10 PM, Richard Cochran wrote:
> On Thu, Nov 20, 2014 at 07:26:00PM +0530, Sekhar Nori wrote:
>> I tested this using lcd7 cape connected to beaglebone black. The latest
>> kernel I could find on this board was a TI BSP based v3.14 kernel. So I
>> had to port these patches to that kernel. Cc Robert Nelson to see if he
>> knows about a more recent kernel supporting that cape.
> 
> What is missing from mainline for the black?
> 
> (I thought it was fully supported by now.)

Black is supported, but LCD7 cape is not.

>  
>> I did not see any breakage with these patches applied although I did not
>> see any noticeable performance improvement as well.
> 
> So, the jumping on pen-up persists, right?  That means the patch
> series does not provide a general fix for that issue.

Not sure how to reproduce the jumping on pen-up. I was able to draw
circles, sign my name and actually today I wrote up the whole English
alphabet on the screen. Picture here.

https://drive.google.com/file/d/0ByWLwvGx8MeyVF9CTlhHU0FHMFk/view?usp=sharing

Is there any particular pattern you want me to test with?

I would still like to test with a more recent kernel on LCD7 cape. So,
if anyone has ideas (other than I porting the LCD7 support) please let
me know.

Thanks,
Sekhar
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