diff options
| author | Duncan Laurie <dlaurie@google.com> | 2017-06-06 09:11:41 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-06-06 14:36:30 -0700 |
| commit | 9565b8ba06633e840fe9db356973ea21bba68c49 (patch) | |
| tree | d08871c79be55910c006c24fb52b56ec275aefd7 | |
| parent | 51f5875da6b542f7947cd7ca9efdbd61b5d937ce (diff) | |
| download | chrome-ec-9565b8ba06633e840fe9db356973ea21bba68c49.tar.gz | |
eve: Set VCCIO rail to 0.85 and disable low power
Set the VCCIO rail to 0.85V where it should be for Y-series parts
instead of forcing it to 1.0V. The EDS is pretty clear that pushing
this voltage higher on Y-series parts will have significant power penalty.
(up to 250mW at 0.95V)
We also don't want this rail dropping in low power mode, which shoudln't
be happening as S0ix is disabled so SLP_S0 shouldn't assert, but just in
case disable this as well.
BUG=b:35587084
BRANCH=eve
TEST=stress testing on Eve EVT units
Change-Id: I5535fe0d894f283a8d453d61101dfeb6b9287b7c
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://chromium-review.googlesource.com/525836
Reviewed-by: Todd Broch <tbroch@chromium.org>
| -rw-r--r-- | board/eve/board.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/board/eve/board.c b/board/eve/board.c index 85f82b6932..8ef4746692 100644 --- a/board/eve/board.c +++ b/board/eve/board.c @@ -358,10 +358,9 @@ static void board_pmic_init(void) /* * Set V085ACNT / V0.85A Control Register: - * Lower power mode = 0.7V. - * Nominal output = 1.0V. + * Nominal output = 0.85V. */ - i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x38, 0x7a); + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x38, 0x2a); /* VRMODECTRL - disable low-power mode for all rails */ i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x3b, 0x1f); |