[coreboot-gerrit] Patch merged into coreboot/master: mainboard/google/reef: Set IOSSTATE for trackpad I2C GPIOs

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit f224e836c0236621b52ea7d3c1118d2053df3537
Author: Vaibhav Shankar <vaibhav.shankar at intel.com>
Date:   Fri Jan 27 11:37:30 2017 -0800

    mainboard/google/reef: Set IOSSTATE for trackpad I2C GPIOs
    
    I2C data (GPIO_132) and Clk (GPIO_133) lines are pulled low during
    standby states S3/S0ix. This causes leakage of power. To reduce the
    leakage, we have to pull these lines high during S3/S0ix. This is
    done by programming the IOSSTATE to HIz. Also note that we are using
    the internal pull ups to keep at SOC at 1.8V and the I2C lines are
    not floating.
    
    BUG=chrome-os-partner:62428,chrome-os-partner:61651
    TEST=Enter S3/S0ix. Measure trackpad power. It should be less
    than 4mW. Also I2c lines should be pulled high in S3/S0ix.
    
    Change-Id: I5570ac37ec3cc41f6463dd6b858fdb56a20a1733
    Signed-off-by: Vaibhav Shankar <vaibhav.shankar at intel.com>
    Reviewed-on: https://review.coreboot.org/18251
    Reviewed-by: Aaron Durbin <adurbin at chromium.org>
    Tested-by: build bot (Jenkins)


See https://review.coreboot.org/18251 for details.

-gerrit