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google/chell: Adjust nuvoton 8825 button thresholds again. 

Changing these thresholds again for new tuning in March of 2016.
Something's changed in the latest firmware to cause all
values previously read on Chell to float down.

Set "nuvoton,sar-threshold" property to thresholds
based on tuning with the Android Wired Headphone
Compatibility Kit and Chell DVT.

Signed-off-by: Benson Leung <bleung@chromium.org>

BUG=chrome-os-partner:49333
BRANCH=none
TEST=Run evtest, selecting the input event for sklnau8825adi
Using the Nominal headphones from the kit, check that the
buttons for "KEY_VOLUMEDOWN", "KEY_VOLUMEUP", "KEY_MEDIA",
and code 582 (?) (should be voice search, but evtest doesn't understand)
All of these buttons should work properly.

Change-Id: Ie5ff1d35599d2cca5ce76467ecd7ec3ecab42d8b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 1d13e967addb5cd31e6196e32541cda97ae00257
Original-Change-Id: I11de7a0853a3598f3834e8bae3140b9942cbd0b0
Original-Reviewed-on: https://chromium-review.googlesource.com/334402
Original-Commit-Ready: Benson Leung <bleung@chromium.org>
Original-Tested-by: Benson Leung <bleung@chromium.org>
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/14233
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Benson Leung 2016-03-22 13:37:51 -07:00 committed by Patrick Georgi
parent c445b4fc77
commit 473e0c35fe
1 changed files with 1 additions and 1 deletions
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2
src/mainboard/google/chell/acpi/mainboard.asl
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@ -172,7 +172,7 @@ Scope (\_SB.PCI0.I2C4)
* Compatibility Kit and a Chell EVT * Compatibility Kit and a Chell EVT
*/ */
Package () {"nuvoton,sar-threshold", Package () {"nuvoton,sar-threshold",
Package () {0x20, 0x32, 0x50, 0x70}}, Package () {0x0c, 0x1c, 0x38, 0x60}},
Package () {"nuvoton,sar-hysteresis", 1}, Package () {"nuvoton,sar-hysteresis", 1},
/* VDDA for button impedance measurement */ /* VDDA for button impedance measurement */
Package () {"nuvoton,sar-voltage", 0}, Package () {"nuvoton,sar-voltage", 0},