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usb: typec: ucsi: psy: Add power supply status

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Add support for power supply status. If a port is acting as a sink
with the sink path enabled, report it is charging. If a port is
source, report it is discharging. If there is no connection or the
port hasn't enabled the sink path, report not charging.

Signed-off-by: Jameson Thies <jthies@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Tested-By: Kenneth R. Crudup <kenny@panix.com>
Link: https://patch.msgid.link/20251016235909.2092917-2-jthies@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jameson Thies 2025-10-16 23:59:07 +00:00 committed by Greg Kroah-Hartman
parent 0ec946d32e
commit ef7204a9aa
2 changed files with 29 additions and 0 deletions
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26
drivers/usb/typec/ucsi/psy.c
View File

@ -29,6 +29,7 @@ static enum power_supply_property ucsi_psy_props[] = {
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_STATUS,
};
static int ucsi_psy_get_scope(struct ucsi_connector *con,
@ -51,6 +52,29 @@ static int ucsi_psy_get_scope(struct ucsi_connector *con,
return 0;
}
static int ucsi_psy_get_status(struct ucsi_connector *con,
union power_supply_propval *val)
{
bool is_sink = UCSI_CONSTAT(con, PWR_DIR) == TYPEC_SINK;
bool sink_path_enabled = true;
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
if (con->ucsi->version >= UCSI_VERSION_2_0)
sink_path_enabled =
UCSI_CONSTAT(con, SINK_PATH_STATUS_V2_0) ==
UCSI_CONSTAT_SINK_PATH_ENABLED;
if (UCSI_CONSTAT(con, CONNECTED)) {
if (is_sink && sink_path_enabled)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (!is_sink)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
}
return 0;
}
static int ucsi_psy_get_online(struct ucsi_connector *con,
union power_supply_propval *val)
{
@ -245,6 +269,8 @@ static int ucsi_psy_get_prop(struct power_supply *psy,
return ucsi_psy_get_current_now(con, val);
case POWER_SUPPLY_PROP_SCOPE:
return ucsi_psy_get_scope(con, val);
case POWER_SUPPLY_PROP_STATUS:
return ucsi_psy_get_status(con, val);
default:
return -EINVAL;
}

3
drivers/usb/typec/ucsi/ucsi.h
View File

@ -360,6 +360,9 @@ struct ucsi_cable_property {
#define UCSI_CONSTAT_BC_SLOW_CHARGING 2
#define UCSI_CONSTAT_BC_TRICKLE_CHARGING 3
#define UCSI_CONSTAT_PD_VERSION_V1_2 UCSI_DECLARE_BITFIELD_V1_2(70, 16)
#define UCSI_CONSTAT_SINK_PATH_STATUS_V2_0 UCSI_DECLARE_BITFIELD_V2_0(87, 1)
#define UCSI_CONSTAT_SINK_PATH_DISABLED 0
#define UCSI_CONSTAT_SINK_PATH_ENABLED 1
#define UCSI_CONSTAT_PWR_READING_READY_V2_1 UCSI_DECLARE_BITFIELD_V2_1(89, 1)
#define UCSI_CONSTAT_CURRENT_SCALE_V2_1 UCSI_DECLARE_BITFIELD_V2_1(90, 3)
#define UCSI_CONSTAT_PEAK_CURRENT_V2_1 UCSI_DECLARE_BITFIELD_V2_1(93, 16)