diff options
| author | Philip Chen <philipchen@google.com> | 2017-10-23 21:24:07 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-10-24 07:29:43 -0700 |
| commit | a109ebc3b1abf53980cb8cdca4feb6b9ce61ffd7 (patch) | |
| tree | e5f7d1c0cc3b8d234df8b44a99cbfa358f37eac3 /driver/battery/max17055.c | |
| parent | 6b516eda69f92cbc9f06b33cdf2c34cf1114ca16 (diff) | |
| download | chrome-ec-a109ebc3b1abf53980cb8cdca4feb6b9ce61ffd7.tar.gz | |
battery/max17055: Measure temperature using external thermistor
By default max17055 measures from internal temperature sensor.
BUG=b:68170538
BRANCH=none
TEST=place a heat source on top of the battery pack and see
temperature rise from 'battery' command
Change-Id: I1c0bb981e366a8a73d2e14e6c1fc92327069e8f1
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/735080
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
Diffstat (limited to 'driver/battery/max17055.c')
| -rw-r--r-- | driver/battery/max17055.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/driver/battery/max17055.c b/driver/battery/max17055.c index bd7e23cb30..b425e828b4 100644 --- a/driver/battery/max17055.c +++ b/driver/battery/max17055.c @@ -50,6 +50,9 @@ #define STATUS_POR 0x0002 #define STATUS_BST 0x0008 +/* Config reg (0x1d) flags */ +#define CONF_TSEL 0x8000 + /* FStat reg (0x3d) flags */ #define FSTAT_DNR 0x0001 @@ -378,6 +381,16 @@ static void max17055_init(void) return; } + /* Set CONFIG.TSEL to measure temperature using external thermistor */ + if (max17055_read(REG_CONFIG, ®)) { + CPRINTS("%s: failed to read reg %02x", __func__, REG_CONFIG); + return; + } + if (max17055_write(REG_CONFIG, (reg | CONF_TSEL))) { + CPRINTS("%s: failed to write reg %02x", __func__, REG_CONFIG); + return; + } + CPRINTS("max17055 configuration succeeded!"); } DECLARE_HOOK(HOOK_INIT, max17055_init, HOOK_PRIO_DEFAULT); |