diff options
| author | Randall Spangler <rspangler@chromium.org> | 2014-02-07 10:45:05 -0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-02-08 00:14:48 +0000 |
| commit | 5c808ee56c44be4c665de6a85f5feb5cd5753f9d (patch) | |
| tree | d7f5af16f6775b56ecb1725a86b3b20d617cfdd5 /include/dptf.h | |
| parent | 558292108af63916fb502d2bcdf19bf3407810b0 (diff) | |
| download | chrome-ec-5c808ee56c44be4c665de6a85f5feb5cd5753f9d.tar.gz | |
Support DPTF charger current limiting
This enables the AP to limit charging current via ACPI.
BUG=chrome-os-partner:23971
BRANCH=rambi
TEST=manual
drain battery down to <90%, then plug into AC
(charger commands at EC console, iotools at root shell)
iotools io_write8 0x66 0x81
iotools io_write8 0x62 0x08
iotools io_write8 0x62 3
charger -> dptf limit 192, I_batt=192
charger dptf 320
charger -> dptf limit 320, I_batt=320
iotools io_write8 0x66 0x80
iotools io_write8 0x62 0x08
iotools io_read8 0x62 -> 0x05
iotools io_write8 0x66 0x81
iotools io_write8 0x62 0x08
iotools io_write8 0x62 0xff
charger -> dptf disabled, I_batt=(something > 192)
iotools io_write8 0x66 0x80
iotools io_write8 0x62 0x08
iotools io_read8 0x62 -> 0xff
Change-Id: Iace2ebbbc018143c0154310d7acd02d16a6b7339
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/185411
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Diffstat (limited to 'include/dptf.h')
| -rw-r--r-- | include/dptf.h | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/include/dptf.h b/include/dptf.h index f611acb361..6797806e18 100644 --- a/include/dptf.h +++ b/include/dptf.h @@ -8,26 +8,44 @@ #ifndef __CROS_EC_DPTF_H #define __CROS_EC_DPTF_H -/* 0-100% sets fixed duty cycle, out of range means let the EC drive */ +/** + * Set fan duty target. + * + * 0-100% sets fixed duty cycle, out of range means let the EC drive. + */ void dptf_set_fan_duty_target(int pct); -/* 0-100% if in duty mode. -1 if not */ +/** + * Return 0-100% if in duty mode. -1 if not. + */ int dptf_get_fan_duty_target(void); /* Thermal thresholds may be set for each temp sensor. */ #define DPTF_THRESHOLDS_PER_SENSOR 2 #define DPTF_THRESHOLD_HYSTERESIS 2 -/* Set/enable the thresholds */ +/** + * Set/enable the thresholds. + */ void dptf_set_temp_threshold(int sensor_id, /* zero-based sensor index */ int temp, /* in degrees K */ int idx, /* which threshold (0 or 1) */ int enable); /* true = on, false = off */ -/* +/** * Return the ID of a temp sensor that has crossed its threshold since the last - time we asked. -1 means none. + * time we asked. -1 means none. */ int dptf_query_next_sensor_event(void); +/** + * Set charging current limit, in mA. -1 means no limit. + */ +void dptf_set_charging_current_limit(int ma); + +/** + * Get charging current limit, in mA, or -1 if not DPTF-limiting. + */ +int dptf_get_charging_current_limit(void); + #endif /* __CROS_EC_DPTF_H */ |