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| author | Caveh Jalali <caveh@chromium.org> | 2021-06-10 17:51:02 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-06-12 02:26:12 +0000 |
| commit | 4b76b49a4eb9e10d90ca0860382751c276661991 (patch) | |
| tree | 3ee51f9a52b709217462068f50eb180a00726aa7 /board | |
| parent | 077bb92c4a41db95d1dd1f824c19f87ac0b1d715 (diff) | |
| download | chrome-ec-4b76b49a4eb9e10d90ca0860382751c276661991.tar.gz | |
brya: Check burnside bridge RESET signal status
This adds a level check of the burnside bridge reset signal GPIO. The
signal is connected to a GPIO on the nct3808 which becomes
uncontrollable when a debug accessory is connected and forces the BB
into reset. We can check for this case by reading back the level of the
GPIO and return an error when the desired signal level has not been
achieved.
BRANCH=none
BUG=b:181743576,b:188826559
TEST=buildall passes, PD still works on brya
Change-Id: Ia21cbc699f857542600cc5946868e9c58cfa6cf9
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2955608
Reviewed-by: Boris Mittelberg <bmbm@google.com>
Diffstat (limited to 'board')
| -rw-r--r-- | board/brya/usbc_config.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/board/brya/usbc_config.c b/board/brya/usbc_config.c index 34ae44f2fa..d24143c40b 100644 --- a/board/brya/usbc_config.c +++ b/board/brya/usbc_config.c @@ -220,6 +220,20 @@ __override int bb_retimer_power_handle(const struct usb_mux *me, int on_off) * which powers I2C controller within retimer */ msleep(1); + if (get_board_id() == 1) { + int val; + + /* + * Check if we were able to deassert + * reset. Board ID 1 uses a GPIO that is + * uncontrollable when a debug accessory is + * connected. + */ + if (ioex_get_level(rst_signal, &val) != EC_SUCCESS) + return EC_ERROR_UNKNOWN; + if (val != 1) + return EC_ERROR_NOT_POWERED; + } } else { ioex_set_level(rst_signal, 0); msleep(1); |