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| author | Furquan Shaikh <furquan@google.com> | 2020-07-14 12:42:08 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2020-07-16 16:39:16 +0000 |
| commit | ddfec569d1c98afd5e038be7614bc0d0a926d2e0 (patch) | |
| tree | af459726ff0ac435b5144de632fb34d0eb931d97 /Documentation/COPYING | |
| parent | 9961343e67335c1e01ea57b4229c3acff42cf71a (diff) | |
| download | coreboot-ddfec569d1c98afd5e038be7614bc0d0a926d2e0.tar.xz | |
mb/google/zork: Drop power and reset control in romstage for dalboz
This change drops power and reset control for non PCIe devices in
romstage for dalboz reference 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) |
+---------------------------------------------------------------------------------------+
| 6 |EN_PWR_TOUCHPAD| 499K PD | PU | S5 | Powered on | Powered on |
| | | | | | (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) |
+---------------------------------------------------------------------------------------+
| 141 | USB_HUB_RST_L | 10K PU | PD | S0 | Asserted | Asserted |
| | | | | | (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: Ie792a5a9d6420763ff10d1e475c094b6ee514888
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43463
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'Documentation/COPYING')
0 files changed, 0 insertions, 0 deletions