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power: supply: wilco_ec: Add long life charging mode

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This is a long life mode set in the factory for extended warranty
battery, the power charging rate is customized so that battery at
work last longer.

Presently switching to a different battery charging mode is through
EC PID 0x0710 to configure the battery firmware, this operation will
be blocked by EC with failure code 0x01 when PLL mode is already
in use.

Signed-off-by: Crag Wang <crag.wang@dell.com>
Reviewed-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Crag Wang 2020-07-30 11:26:09 +08:00 committed by Sebastian Reichel
parent 707d678a5c
commit 46cbd0b057
4 changed files with 11 additions and 0 deletions
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4
Documentation/ABI/testing/sysfs-class-power-wilco
View File

@ -14,6 +14,10 @@ Description:
Charging begins when level drops below
charge_control_start_threshold, and ceases when
level is above charge_control_end_threshold.
Long Life: Customized charge rate for last longer battery life.
On Wilco device this mode is pre-configured in the factory
through EC's private PID. Swiching to a different mode will
be denied by Wilco EC when Long Life mode is enabled.
What: /sys/class/power_supply/wilco-charger/charge_control_start_threshold
Date: April 2019

1
drivers/power/supply/power_supply_sysfs.c
View File

@ -87,6 +87,7 @@ static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = {
[POWER_SUPPLY_CHARGE_TYPE_STANDARD] = "Standard",
[POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE] = "Adaptive",
[POWER_SUPPLY_CHARGE_TYPE_CUSTOM] = "Custom",
[POWER_SUPPLY_CHARGE_TYPE_LONGLIFE] = "Long Life",
};
static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {

5
drivers/power/supply/wilco-charger.c
View File

@ -27,6 +27,7 @@ enum charge_mode {
CHARGE_MODE_AC = 3, /* Mostly AC use, used for Trickle */
CHARGE_MODE_AUTO = 4, /* Used for Adaptive */
CHARGE_MODE_CUSTOM = 5, /* Used for Custom */
CHARGE_MODE_LONGLIFE = 6, /* Used for Long Life */
};
#define CHARGE_LOWER_LIMIT_MIN 50
@ -48,6 +49,8 @@ static int psp_val_to_charge_mode(int psp_val)
return CHARGE_MODE_AUTO;
case POWER_SUPPLY_CHARGE_TYPE_CUSTOM:
return CHARGE_MODE_CUSTOM;
case POWER_SUPPLY_CHARGE_TYPE_LONGLIFE:
return CHARGE_MODE_LONGLIFE;
default:
return -EINVAL;
}
@ -67,6 +70,8 @@ static int charge_mode_to_psp_val(enum charge_mode mode)
return POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE;
case CHARGE_MODE_CUSTOM:
return POWER_SUPPLY_CHARGE_TYPE_CUSTOM;
case CHARGE_MODE_LONGLIFE:
return POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
default:
return -EINVAL;
}

1
include/linux/power_supply.h
View File

@ -48,6 +48,7 @@ enum {
POWER_SUPPLY_CHARGE_TYPE_STANDARD, /* normal speed */
POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE, /* dynamically adjusted speed */
POWER_SUPPLY_CHARGE_TYPE_CUSTOM, /* use CHARGE_CONTROL_* props */
POWER_SUPPLY_CHARGE_TYPE_LONGLIFE, /* slow speed, longer life */
};
enum {