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| author | Tom Hughes <tomhughes@chromium.org> | 2020-01-02 15:36:04 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-01-08 00:47:29 +0000 |
| commit | 0b838e162b35c6115de2cc049df699a65f9ee019 (patch) | |
| tree | 84d4e83e193f1c884695f12673f3b0f9028ac19a /driver/fingerprint/fpc | |
| parent | ceaa05993490943b19cdf61bcd195cf016d31827 (diff) | |
| download | chrome-ec-0b838e162b35c6115de2cc049df699a65f9ee019.tar.gz | |
bloonchipper: Add transport and sensor detection
bloonchipper (aka hatch_fp aka dragonclaw) has a voltage divider that
can be used to select the sensor and the transport type.
Supported designs:
* Dragonclaw rev 0.2 (green with Google logo):
go/dragonclaw-schematic-rev-0.2
* Hatch reference v3.0:
go/hatch-schematic-rev-3.0
The selection lines are connected to ADC inputs, so a future change will
use the ADC to allow more than two transports or sensors.
BRANCH=none
BUG=b:147113851
TEST=flash dragonclaw rev 0.2 and view console output
Change-Id: If2e4b150d34cfe41477be528c70e1645043d4d82
Signed-off-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1986322
Reviewed-by: Craig Hesling <hesling@chromium.org>
Diffstat (limited to 'driver/fingerprint/fpc')
| -rw-r--r-- | driver/fingerprint/fpc/bep/fpc_private.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/driver/fingerprint/fpc/bep/fpc_private.c b/driver/fingerprint/fpc/bep/fpc_private.c index 9bcd4f65ff..61bad9f101 100644 --- a/driver/fingerprint/fpc/bep/fpc_private.c +++ b/driver/fingerprint/fpc/bep/fpc_private.c @@ -8,6 +8,7 @@ #include "fpc_bio_algorithm.h" #include "fpsensor.h" +#include "gpio.h" #include "spi.h" #include "system.h" #include "util.h" @@ -142,6 +143,12 @@ int fp_sensor_init(void) { int rc; + /* The dragonclaw development board needs this enabled to enable the + * AND gate (U10) to CS. Production boards could disable this to save + * power since it's only needed for initial detection on those boards. + */ + gpio_set_level(GPIO_DIVIDER_HIGHSIDE, 1); + /* Print the binary libfpbep.a library version */ CPRINTS("FPC libfpbep.a %s", fp_sensor_get_version()); |