Re: [PATCH v6 2/6] input: touchscreen: ti_am335x_tsc: Remove udelay in interrupt handler

On Fri, Jan 30, 2015 at 10:56:28AM +0530, Vignesh R wrote:

On Wednesday 07 January 2015 11:19 AM, Vignesh R wrote:

quoted

From: Brad Griffis <redacted>

TSC interrupt handler had udelay to avoid reporting of false pen-up
interrupt to user space. This patch implements workaround suggesting in
Advisory 1.0.31 of silicon errata for am335x, thus eliminating udelay
and touchscreen lag. This also improves performance of touchscreen and
eliminates sudden jump of cursor at touch release.

IDLECONFIG and CHARGECONFIG registers are to be configured
with same values in order to eliminate false pen-up events. This
workaround may result in false pen-down to be detected, hence considerable
charge step delay needs to be added. The charge delay is set to 0xB000
(in terms of ADC clock cycles) by default.

TSC steps are disabled at the end of every sampling cycle and EOS bit is
set. Once the EOS bit is set, the TSC steps need to be re-enabled to begin
next sampling cycle.

Signed-off-by: Brad Griffis <redacted>
[vigneshr-l0cyMroinI0@public.gmane.org: Ported the patch from v3.12 to v3.19rc1]

Signed-off-by: Vignesh R <redacted>
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Ping... Can somebody pick this patch series if there are no more comments??

Yes, I picked up everything but patch #3 as I assume Lee will merge it
through MFD tree.

Thanks.

-- 
Dmitry