power: supply: bq2415x_charger: report charging state changes to userspace

Continuously track the charging status register in order to send uevents
whenever the state changes. Generate an uevent also when the chip's OTG
line is toggled, in bq2415x_notifier_call().

Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com>
Link: https://lore.kernel.org/r/20241128085759.11840-2-absicsz@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/supply/bq2415x_charger.c b/drivers/power/supply/bq2415x_charger.c
index 5e174242d2dec49f0dc16822ae862af77a82f3d7..18a6c3dbc758357a6ed7b5974e06f862e5067941 100644 (file)
--- a/drivers/power/supply/bq2415x_charger.c
+++ b/drivers/power/supply/bq2415x_charger.c
@@ -171,6 +171,7 @@ struct bq2415x_device {
        char *name;
        int autotimer;  /* 1 - if driver automatically reset timer, 0 - not */
        int automode;   /* 1 - enabled, 0 - disabled; -1 - not supported */
+       int charge_status;
        int id;
 };
 
@@ -835,6 +836,8 @@ static int bq2415x_notifier_call(struct notifier_block *nb,
        if (!bq2415x_update_reported_mode(bq, prop.intval))
                return NOTIFY_OK;
 
+       power_supply_changed(bq->charger);
+
        /* if automode is not enabled do not tell about reported_mode */
        if (bq->automode < 1)
                return NOTIFY_OK;
@@ -889,12 +892,19 @@ static void bq2415x_timer_work(struct work_struct *work)
        int ret;
        int error;
        int boost;
+       int charge;
 
        if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
                sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
                bq2415x_set_mode(bq, bq->reported_mode);
        }
 
+       charge = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
+       if (bq->charge_status != charge) {
+               power_supply_changed(bq->charger);
+               bq->charge_status = charge;
+       }
+
        if (!bq->autotimer)
                return;