slippy: Add on-board devices and configure GPIO irq/wake
Add the onboard I2C devices for Slippy trackpad/lightsensor
and generate SMBIOS Type41 tables for them.
Add ACPI device for the trackpad to expose the interrupt map
to the OS so it can be used.
Configure interrupt GPIOs as PIRQ type and wake GPIOs as
just standard input type. The wake GPIO is reconfigured as
ACPI SCI in the specific device _DSW method. This prevents
the wake GPIO from generating a flood of SCI at runtime.
LTE_WAKE_L_Q and WLAN_WAKE_L_Q are left as ACPI SCI as these
are not repurposed interrupt pins so they are not generated
at runtime.
SIM_DET and ALS_INT_L are set as input since we don't have an
interrupt handler for them.
tested on slippy with trackpad with additional
kernel changes to chromeos_laptop.c to initialize devices.
1) Ensure trackpad interrupt is functional and that there
is not a flood of ACPI SCI when trackpad does interrupt:
9: 1 0 0 0 IO-APIC-fasteoi acpi
37: 421 0 0 0 IO-APIC-fasteoi cyapa
2) Ensure that devices are exposed as wake capable:
Device S-state Status Sysfs node
TPAD S3 *enabled pnp:00:00
TSCR S3 *disabled pnp:00:01
3) Ensure that trackpad can wake from S3 by default, but
that it does not cause an immediate wake when entering suspend.
4) Ensure that trackpad can be disabled as a wake source with
echo TPAD > /proc/acpi/wakeup
Change-Id: Id562d20b54eeefec56040b8f70ef238911312628
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/56622
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4190
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
4 files changed