[PATCH 02/10] power: charger-manager: Use power_supply_changed() not private uevent.

Jonghwa Lee
2014-10-30T12:46:32Z

Whenever battery status is changed, charger manager tries to trigger uevent
through private interface. This patch modifies it to use power_supply_changed()
since it belongs to power supply subsystem.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
---
drivers/power/charger-manager.c | 91 +++++----------------------------------
1 file changed, 11 insertions(+), 80 deletions(-)

diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index b4b101c..33a1a4d 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -28,18 +28,6 @@
#include <linux/of.h>
#include <linux/thermal.h>

-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
@@ -56,8 +44,6 @@ 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);

@@ -423,61 +409,6 @@ static int try_charger_restart(struct charger_manager *cm)
}

/**
- * 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
*
@@ -514,7 +445,7 @@ 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);
}
}

@@ -545,7 +476,7 @@ 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;
}
@@ -556,7 +487,7 @@ 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;
}
@@ -638,7 +569,7 @@ 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 discharing duration
@@ -663,7 +594,7 @@ 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);

@@ -672,7 +603,7 @@ 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);
}
}

@@ -793,7 +724,7 @@ 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);
}

/**
@@ -807,9 +738,9 @@ 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);
}
}

@@ -826,7 +757,7 @@ 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,
@@ -1988,7 +1919,7 @@ 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__);
--
1.7.9.5