diff options
| author | Vincent Palatin <vpalatin@chromium.org> | 2015-01-07 09:26:25 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-01-08 22:36:23 +0000 |
| commit | dce1b1e8b17a21e577dd6446932d27bf93056a36 (patch) | |
| tree | 8ee584af152f888e7621e300563ba1245e8ad37d | |
| parent | 963d4762b2ecb23d5a048592d122901bd5b3b6e4 (diff) | |
| download | chrome-ec-dce1b1e8b17a21e577dd6446932d27bf93056a36.tar.gz | |
twinkie: turn on/off VCONN INA
the VCONN INA is off by default to avoid a leakage path on CC2.
Turn it on when asking for a VCONN measurement ("twinkie vconn"),
then off aftwerwards.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=none
TEST=On the Twinkie command-line, "tw vconn" with the Twinkie interposed
between a Samus and a DingDong.
Change-Id: I8cd78b285512644af0824a44c735585b684fee66
Reviewed-on: https://chromium-review.googlesource.com/239212
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
| -rw-r--r-- | board/twinkie/injector.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/board/twinkie/injector.c b/board/twinkie/injector.c index 03db1c4af5..7365712551 100644 --- a/board/twinkie/injector.c +++ b/board/twinkie/injector.c @@ -427,9 +427,21 @@ static int cmd_rx_threshold(int argc, char **argv) static int cmd_ina_dump(int argc, char **argv, int index) { + if (index == 1) { /* VCONN INA is off by default, switch it on */ + ina2xx_write(index, INA2XX_REG_CONFIG, 0x4123); + /* + * wait for the end of conversion : 2x 1.1ms as defined + * by the Vb and Vsh CT bits in the CONFIG register above. + */ + udelay(2200); + } + ccprintf("%s = %d mV ; %d mA\n", index == 0 ? "VBUS" : "VCONN", ina2xx_get_voltage(index), ina2xx_get_current(index)); + if (index == 1) /* power off VCONN INA */ + ina2xx_write(index, INA2XX_REG_CONFIG, 0); + return EC_SUCCESS; } |