diff options
| author | Koro Chen <koro.chen@mediatek.com> | 2016-06-28 09:48:08 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-06-29 05:15:41 -0700 |
| commit | 535448d29ec9751b0dffa8aba67b32ad05729974 (patch) | |
| tree | 161297c7be4eece313fdf00464869f34120f6313 | |
| parent | ac8e2c3c5025dfd2bdac5faa9aebb18b3b48d9ac (diff) | |
| download | chrome-ec-535448d29ec9751b0dffa8aba67b32ad05729974.tar.gz | |
elm: Choose low input voltage whenever possible
To achieve higher power efficiency, we want the input voltage to be as
low as possible. If the PD source advertise several choices over
PD_MAX_POWER_MW, choose the one with the lowest voltage.
BRANCH=none
BUG=chrome-os-partner:54519
TEST=Plug in Liteon charger and make sure 15V/3A is selected
Change-Id: I6157eb94a1cb45cd537acc79c377db2cff09d922
Signed-off-by: Koro Chen <koro.chen@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/356317
Reviewed-by: Rong Chang <rongchang@chromium.org>
| -rw-r--r-- | board/elm/board.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/board/elm/board.h b/board/elm/board.h index 1edd4bcc60..41fdc60a6f 100644 --- a/board/elm/board.h +++ b/board/elm/board.h @@ -206,6 +206,9 @@ enum temp_sensor_id { #define PD_MAX_CURRENT_MA CONFIG_CHARGER_MAX_INPUT_CURRENT #define PD_MAX_VOLTAGE_MV 20000 +/* The lower the input voltage, the higher the power efficiency. */ +#define PD_PREFER_LOW_VOLTAGE + /* Reset PD MCU */ void board_reset_pd_mcu(void); /* Set AP reset pin according to parameter */ |