diff options
| author | Furquan Shaikh <furquan@google.com> | 2020-07-14 12:15:59 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2020-07-16 16:39:09 +0000 |
| commit | 9961343e67335c1e01ea57b4229c3acff42cf71a (patch) | |
| tree | ea80e2f66fbe61c447c79488ff84e21595e58e83 /util/chromeos | |
| parent | eb912ed9adbef056f01a9278cc98745ea5a6dbf0 (diff) | |
mb/google/zork: Drop power and reset control in romstage for trembyle
This change drops power and reset control for non PCIe devices in
romstage as this is not required.
+---------------------+--------------------------------------------+--------------------+
| GPIO| Net name | External| Internal| Domain| State at reset | State on S3 resume |
| # | | Pull | Pull | | | |
+---------------------------------------------------------------------------------------+
| 5 | PEN_POWER_EN | 100K PD | PD | S5 | Powered off | Powered on |
| | | | | | (because of | (since power is not|
| | | | | | internal PD) | disabled when |
| | | | | | | entering S3) |
+---------------------------------------------------------------------------------------+
| 13 |EN_PWR_TOUCHPAD| 499K PD | PU | S5 | Powered on | Powered on |
| |_PS2 | | | | (because of | (since trackpad |
| | | | | | internal PU) | is wake source) |
+---------------------------------------------------------------------------------------+
| 68 | EMMC_RESET_L | 100K PU | PD | S0 | Asserted | Asserted |
| | | | | | (because of | (because of |
| | | | | | internal PD) | internal PD) |
+---------------------------------------------------------------------------------------+
| 76 | EN_PWR_CAMERA | 499K PD | PD | S0 | Powered off | Powered off |
| | | | | | (because of | (because of |
| | | | | | internal PD) | internal PD) |
+---------------------------------------------------------------------------------------+
| 140 | USI_RESET | 10K PD | PD | S0 | Deasserted | Deasserted |
| | | | | | (because of | (because of |
| | | | | | internal PD) | internal PD) |
+---------------------------------------------------------------------------------------+
+---------------------------------------------------------------------------------------+
| 67 |EN_PWR_TOUCHPAD| 10K PU | PD | S0 | Powered off | Powered off |
| |_PS2 (pre-V3) | | | | (because of | (because of |
| | | | | | internal PD) | internal PD) |
| | | | | | | |
+-----+---------------+---------+---------+-------+----------------+--------------------+
GPIO_140 starts deasserted out of reset and S3 resume, but gets
asserted in ramstage since it is eventually deasserted by OS using
ACPI methods.
BUG=b:154351731
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: Ieadc62f1a13857209cf0a62f204efb9278e0e97d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43462
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'util/chromeos')
0 files changed, 0 insertions, 0 deletions