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

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Date:	Thu, 20 Nov 2014 15:40:28 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Sekhar Nori <nsekhar@...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 save

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.)
 
> 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.
 
> I also tested this series on AM335x EVM using the v3.18-rc5 kernel.
> Again, no breakage but no improvement as well.

You still have jumps on a pen up event?

Thanks,
Richard
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