diff options
| author | Vijay Hiremath <vijay.p.hiremath@intel.com> | 2015-08-21 17:53:38 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2015-09-10 12:35:39 -0700 |
| commit | dda0704bf96e04fbbe979ce721a14c3c12b8f45f (patch) | |
| tree | 9fb7e4fc9510a838a0e3c5ea35b9d52943606153 | |
| parent | aca33e4de2c07a3ab7973c2550818b214ffa6395 (diff) | |
| download | chrome-ec-dda0704bf96e04fbbe979ce721a14c3c12b8f45f.tar.gz | |
Driver: ISL9237: Enable trickle charging
Enabled the trickle charging mode by setting the MinSystemVoltage
register[0x3EH] to board specific battery voltage minimum value.
When the battery voltage drops below the battery voltage minimum
value, trickle charging enabled.
BUG=none
TEST=Manually tested on Kunimitsu FAB4 prototype.
Drained the battery below voltage minimum value. Using the
i2cxfer command observed Trickle charging mode is active in
the information register[0x3AH].
BRANCH=none
Change-Id: Id6416f2b0b74fda8cf3eafb95e044586f90b8a8e
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/298143
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Rong Chang <rongchang@chromium.org>
| -rw-r--r-- | board/kunimitsu/board.h | 3 | ||||
| -rw-r--r-- | driver/charger/isl9237.c | 8 | ||||
| -rw-r--r-- | include/config.h | 3 |
3 files changed, 14 insertions, 0 deletions
diff --git a/board/kunimitsu/board.h b/board/kunimitsu/board.h index 3310030cd9..2a5196e5ce 100644 --- a/board/kunimitsu/board.h +++ b/board/kunimitsu/board.h @@ -34,6 +34,9 @@ #endif #define CONFIG_CHARGER_SENSE_RESISTOR 10 #define CONFIG_CHARGER_SENSE_RESISTOR_AC 20 +#ifndef KUNIMITSU_BOARD_V3 +#define CONFIG_TRICKLE_CHARGING +#endif #define CONFIG_CHIPSET_SKYLAKE #define CONFIG_CLOCK_CRYSTAL diff --git a/driver/charger/isl9237.c b/driver/charger/isl9237.c index 39070bf766..4df9e53e48 100644 --- a/driver/charger/isl9237.c +++ b/driver/charger/isl9237.c @@ -214,6 +214,14 @@ int charger_set_voltage(int voltage) int charger_post_init(void) { +#ifdef CONFIG_TRICKLE_CHARGING + int rv; + const struct battery_info *bi = battery_get_info(); + + rv = raw_write16(ISL9237_REG_SYS_VOLTAGE_MIN, bi->voltage_min); + if (rv) + return rv; +#endif return EC_SUCCESS; } diff --git a/include/config.h b/include/config.h index d0fdbc03a1..2ca35f73d6 100644 --- a/include/config.h +++ b/include/config.h @@ -394,6 +394,9 @@ /* Charger enable GPIO is active low */ #undef CONFIG_CHARGER_EN_ACTIVE_LOW +/* Enable trickle charging */ +#undef CONFIG_TRICKLE_CHARGING + /*****************************************************************************/ /* Chipset config */ |