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Date: Thu, 14 May 2020 16:04:26 -0700
From: Jonathan Bakker <xc-racer2@...e.ca>
To: sre@...nel.org, krzk@...nel.org, jonghwa3.lee@...sung.com,
tglx@...utronix.de, kstewart@...uxfoundation.org,
baolin.wang7@...il.com, linux-pm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Jonathan Bakker <xc-racer2@...e.ca>
Subject: [PATCH 01/10] power: supply: charger-manager: Swap private uevent for power_supply_changed
From: Jonghwa Lee <jonghwa3.lee@...sung.com>
Whenever the battery status is changed, charger manager triggers a uevent
through a private interface. Modify it to use power_supply_changed()
since it belongs to the power supply subsystem.
Signed-off-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Signed-off-by: Jonathan Bakker <xc-racer2@...e.ca>
---
drivers/power/supply/charger-manager.c | 91 ++++----------------------
1 file changed, 11 insertions(+), 80 deletions(-)
diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index a21e1a2673f8..330185b960a5 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -33,18 +33,6 @@
#define CM_DEFAULT_RECHARGE_TEMP_DIFF 50
#define CM_DEFAULT_CHARGE_TEMP_MAX 500
-static const char * const default_event_names[] = {
- [CM_EVENT_UNKNOWN] = "Unknown",
- [CM_EVENT_BATT_FULL] = "Battery Full",
- [CM_EVENT_BATT_IN] = "Battery Inserted",
- [CM_EVENT_BATT_OUT] = "Battery Pulled Out",
- [CM_EVENT_BATT_OVERHEAT] = "Battery Overheat",
- [CM_EVENT_BATT_COLD] = "Battery Cold",
- [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach",
- [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop",
- [CM_EVENT_OTHERS] = "Other battery events"
-};
-
/*
* Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
* delayed works so that we can run delayed works with CM_JIFFIES_SMALL
@@ -61,8 +49,6 @@ static const char * const default_event_names[] = {
*/
#define CM_RTC_SMALL (2)
-#define UEVENT_BUF_SIZE 32
-
static LIST_HEAD(cm_list);
static DEFINE_MUTEX(cm_list_mtx);
@@ -446,61 +432,6 @@ static int try_charger_restart(struct charger_manager *cm)
return try_charger_enable(cm, true);
}
-/**
- * uevent_notify - Let users know something has changed.
- * @cm: the Charger Manager representing the battery.
- * @event: the event string.
- *
- * If @event is null, it implies that uevent_notify is called
- * by resume function. When called in the resume function, cm_suspended
- * should be already reset to false in order to let uevent_notify
- * notify the recent event during the suspend to users. While
- * suspended, uevent_notify does not notify users, but tracks
- * events so that uevent_notify can notify users later after resumed.
- */
-static void uevent_notify(struct charger_manager *cm, const char *event)
-{
- static char env_str[UEVENT_BUF_SIZE + 1] = "";
- static char env_str_save[UEVENT_BUF_SIZE + 1] = "";
-
- if (cm_suspended) {
- /* Nothing in suspended-event buffer */
- if (env_str_save[0] == 0) {
- if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
- return; /* status not changed */
- strncpy(env_str_save, event, UEVENT_BUF_SIZE);
- return;
- }
-
- if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE))
- return; /* Duplicated. */
- strncpy(env_str_save, event, UEVENT_BUF_SIZE);
- return;
- }
-
- if (event == NULL) {
- /* No messages pending */
- if (!env_str_save[0])
- return;
-
- strncpy(env_str, env_str_save, UEVENT_BUF_SIZE);
- kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
- env_str_save[0] = 0;
-
- return;
- }
-
- /* status not changed */
- if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
- return;
-
- /* save the status and notify the update */
- strncpy(env_str, event, UEVENT_BUF_SIZE);
- kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
-
- dev_info(cm->dev, "%s\n", event);
-}
-
/**
* fullbatt_vchk - Check voltage drop some times after "FULL" event.
* @work: the work_struct appointing the function
@@ -538,7 +469,7 @@ static void fullbatt_vchk(struct work_struct *work)
if (diff > desc->fullbatt_vchkdrop_uV) {
try_charger_restart(cm);
- uevent_notify(cm, "Recharging");
+ power_supply_changed(cm->charger_psy);
}
}
@@ -569,7 +500,7 @@ static int check_charging_duration(struct charger_manager *cm)
if (duration > desc->charging_max_duration_ms) {
dev_info(cm->dev, "Charging duration exceed %ums\n",
desc->charging_max_duration_ms);
- uevent_notify(cm, "Discharging");
+ power_supply_changed(cm->charger_psy);
try_charger_enable(cm, false);
ret = true;
}
@@ -580,7 +511,7 @@ static int check_charging_duration(struct charger_manager *cm)
is_ext_pwr_online(cm)) {
dev_info(cm->dev, "Discharging duration exceed %ums\n",
desc->discharging_max_duration_ms);
- uevent_notify(cm, "Recharging");
+ power_supply_changed(cm->charger_psy);
try_charger_enable(cm, true);
ret = true;
}
@@ -688,7 +619,7 @@ static bool _cm_monitor(struct charger_manager *cm)
if (temp_alrt) {
cm->emergency_stop = temp_alrt;
if (!try_charger_enable(cm, false))
- uevent_notify(cm, default_event_names[temp_alrt]);
+ power_supply_changed(cm->charger_psy);
/*
* Check whole charging duration and discharging duration
@@ -713,7 +644,7 @@ static bool _cm_monitor(struct charger_manager *cm)
} else if (!cm->emergency_stop && is_full_charged(cm) &&
cm->charger_enabled) {
dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
- uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]);
+ power_supply_changed(cm->charger_psy);
try_charger_enable(cm, false);
@@ -722,7 +653,7 @@ static bool _cm_monitor(struct charger_manager *cm)
cm->emergency_stop = 0;
if (is_ext_pwr_online(cm)) {
if (!try_charger_enable(cm, true))
- uevent_notify(cm, "CHARGING");
+ power_supply_changed(cm->charger_psy);
}
}
@@ -843,7 +774,7 @@ static void fullbatt_handler(struct charger_manager *cm)
out:
dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
- uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]);
+ power_supply_changed(cm->charger_psy);
}
/**
@@ -857,9 +788,9 @@ static void battout_handler(struct charger_manager *cm)
if (!is_batt_present(cm)) {
dev_emerg(cm->dev, "Battery Pulled Out!\n");
- uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]);
+ power_supply_changed(cm->charger_psy);
} else {
- uevent_notify(cm, "Battery Reinserted?");
+ power_supply_changed(cm->charger_psy);
}
}
@@ -876,7 +807,7 @@ static void misc_event_handler(struct charger_manager *cm,
if (is_polling_required(cm) && cm->desc->polling_interval_ms)
schedule_work(&setup_polling);
- uevent_notify(cm, default_event_names[type]);
+ power_supply_changed(cm->charger_psy);
}
static int charger_get_property(struct power_supply *psy,
@@ -2044,7 +1975,7 @@ void cm_notify_event(struct power_supply *psy, enum cm_event_types type,
break;
case CM_EVENT_UNKNOWN:
case CM_EVENT_OTHERS:
- uevent_notify(cm, msg ? msg : default_event_names[type]);
+ power_supply_changed(cm->charger_psy);
break;
default:
dev_err(cm->dev, "%s: type not specified\n", __func__);
--
2.20.1
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