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Message-ID: <20251007000007.3724229-2-jthies@google.com>
Date: Tue, 7 Oct 2025 00:00:02 +0000
From: Jameson Thies <jthies@...gle.com>
To: heikki.krogerus@...ux.intel.com, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: jthies@...gle.com, dmitry.baryshkov@....qualcomm.com, bleung@...omium.org,
gregkh@...uxfoundation.org, akuchynski@...omium.org,
abhishekpandit@...omium.org, sebastian.reichel@...labora.com,
linux-pm@...r.kernel.org
Subject: [PATCH 1/6] usb: typec: ucsi: psy: Add power supply status
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@...gle.com>
---
drivers/usb/typec/ucsi/psy.c | 26 ++++++++++++++++++++++++++
drivers/usb/typec/ucsi/ucsi.h | 3 +++
2 files changed, 29 insertions(+)
diff --git a/drivers/usb/typec/ucsi/psy.c b/drivers/usb/typec/ucsi/psy.c
index 62a9d68bb66d..2b0225821502 100644
--- a/drivers/usb/typec/ucsi/psy.c
+++ b/drivers/usb/typec/ucsi/psy.c
@@ -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;
}
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index e301d9012936..cce93af7461b 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -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)
--
2.51.0.618.g983fd99d29-goog
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