diff options
Diffstat (limited to 'src/mainboard/google/rambi/chromeos.c')
| -rw-r--r-- | src/mainboard/google/rambi/chromeos.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/google/rambi/chromeos.c b/src/mainboard/google/rambi/chromeos.c index 27af118852..0c3fe2a625 100644 --- a/src/mainboard/google/rambi/chromeos.c +++ b/src/mainboard/google/rambi/chromeos.c @@ -96,6 +96,17 @@ int get_recovery_mode_switch(void) int get_write_protect_state(void) { + /* + * The vboot loader queries this function in romstage. The GPIOs have + * not been set up yet as that configuration is done in ramstage. The + * hardware defaults to an input but there is a 20K pulldown. Externally + * there is a 10K pullup. Disable the internal pull in romstage so that + * there isn't any ambiguity in the reading. + */ +#if defined(__PRE_RAM__) + ssus_disable_internal_pull(WP_STATUS_PAD); +#endif + /* WP is enabled when the pin is reading high. */ return ssus_get_gpio(WP_STATUS_PAD); } |