diff options
| author | Wai-Hong Tam <waihong@google.com> | 2021-03-19 12:53:07 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-03-24 00:36:26 +0000 |
| commit | b8cee54d69416a4035e5a34be196656bf68036c5 (patch) | |
| tree | 204cbc5cc7a8576f49ebe6fbf986226e42c51787 /zephyr | |
| parent | ae877144d1a7a448af3fe5b74a8bebf6abc7f9cf (diff) | |
| download | chrome-ec-b8cee54d69416a4035e5a34be196656bf68036c5.tar.gz | |
zephyr: lazor: define ADC mul and div factors
Copy the mul and div factors from board/lazor/board.c.
The ADC_PSYS doesn't need the hack to handle the overflow;
just set the mul factor to 124000.
BUG=b:182398910
BRANCH=None
TEST=Tested on Lazor:
uart:~$ adc
ADC_VBUS = 5060 mV
ADC_AMON_BMON = 611 mV
ADC_PSYS = 0 mV
Change-Id: I3bd4a30eae04c584efaa2ed302b2b65e4fb4ced7
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2779749
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'zephyr')
| -rw-r--r-- | zephyr/projects/trogdor/boards/arm/trogdor/trogdor.dts | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/zephyr/projects/trogdor/boards/arm/trogdor/trogdor.dts b/zephyr/projects/trogdor/boards/arm/trogdor/trogdor.dts index 1f02a06f68..58fefcf80f 100644 --- a/zephyr/projects/trogdor/boards/arm/trogdor/trogdor.dts +++ b/zephyr/projects/trogdor/boards/arm/trogdor/trogdor.dts @@ -78,14 +78,28 @@ vbus { label = "ADC_VBUS"; channel = <1>; + /* Measure VBUS through a 1/10 voltage divider */ + mul = <10>; }; amon_bmon { label = "ADC_AMON_BMON"; channel = <2>; + /* + * Adapter current output or battery charging/ + * discharging current (uV) 18x amplification on + * charger side. + */ + mul = <1000>; + div = <18>; }; psys { label = "ADC_PSYS"; channel = <3>; + /* + * ISL9238 PSYS output is 1.44 uA/W over 5.6K resistor, + * to read 0.8V @ 99 W, i.e. 124000 uW/mV. + */ + mul = <124000>; }; }; |