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power: supply: ab8500_chargalg: Drop enable/disable sysfs 

There is a sysfs ABI to enable/disable charging of different
types (AC/USB).

Since we don't have any userspace for this code, this sits
unused and it is not used on production products either.

Drop this code.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Linus Walleij 2022-01-29 01:49:23 +01:00 committed by Sebastian Reichel
parent 05906f58c8
commit 75ee3f6f0c
1 changed files with 6 additions and 205 deletions
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211
drivers/power/supply/ab8500_chargalg.c
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@ -77,12 +77,6 @@ struct ab8500_chargalg_charger_info {
int ac_iset_ua;
};
struct ab8500_chargalg_suspension_status {
bool suspended_change;
bool ac_suspended;
bool usb_suspended;
};
struct ab8500_chargalg_battery_data {
int temp;
int volt_uv;
@ -110,8 +104,6 @@ enum ab8500_chargalg_states {
STATE_TEMP_UNDEROVER,
STATE_TEMP_LOWHIGH_INIT,
STATE_TEMP_LOWHIGH,
STATE_SUSPENDED_INIT,
STATE_SUSPENDED,
STATE_OVV_PROTECT_INIT,
STATE_OVV_PROTECT,
STATE_SAFETY_TIMER_EXPIRED_INIT,
@ -141,8 +133,6 @@ static const char * const states[] = {
"TEMP_UNDEROVER",
"TEMP_LOWHIGH_INIT",
"TEMP_LOWHIGH",
"SUSPENDED_INIT",
"SUSPENDED",
"OVV_PROTECT_INIT",
"OVV_PROTECT",
"SAFETY_TIMER_EXPIRED_INIT",
@ -216,7 +206,6 @@ enum maxim_ret {
* @ccm charging current maximization parameters
* @chg_info: information about connected charger types
* @batt_data: data of the battery
* @susp_status: current charger suspension status
* @bm: Platform specific battery management information
* @parent: pointer to the struct ab8500
* @chargalg_psy: structure that holds the battery properties exposed by
@ -241,7 +230,6 @@ struct ab8500_chargalg {
struct ab8500_charge_curr_maximization ccm;
struct ab8500_chargalg_charger_info chg_info;
struct ab8500_chargalg_battery_data batt_data;
struct ab8500_chargalg_suspension_status susp_status;
struct ab8500 *parent;
struct ab8500_bm_data *bm;
struct power_supply *chargalg_psy;
@ -372,37 +360,24 @@ static int ab8500_chargalg_check_charger_enable(struct ab8500_chargalg *di)
*/
static int ab8500_chargalg_check_charger_connection(struct ab8500_chargalg *di)
{
if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg ||
di->susp_status.suspended_change) {
/*
* Charger state changed or suspension
* has changed since last update
*/
if ((di->chg_info.conn_chg & AC_CHG) &&
!di->susp_status.ac_suspended) {
dev_dbg(di->dev, "Charging source is AC\n");
if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg) {
/* Charger state changed since last update */
if (di->chg_info.conn_chg & AC_CHG) {
dev_info(di->dev, "Charging source is AC\n");
if (di->chg_info.charger_type != AC_CHG) {
di->chg_info.charger_type = AC_CHG;
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
}
} else if ((di->chg_info.conn_chg & USB_CHG) &&
!di->susp_status.usb_suspended) {
dev_dbg(di->dev, "Charging source is USB\n");
} else if (di->chg_info.conn_chg & USB_CHG) {
dev_info(di->dev, "Charging source is USB\n");
di->chg_info.charger_type = USB_CHG;
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
} else if (di->chg_info.conn_chg &&
(di->susp_status.ac_suspended ||
di->susp_status.usb_suspended)) {
dev_dbg(di->dev, "Charging is suspended\n");
di->chg_info.charger_type = NO_CHG;
ab8500_chargalg_state_to(di, STATE_SUSPENDED_INIT);
} else {
dev_dbg(di->dev, "Charging source is OFF\n");
di->chg_info.charger_type = NO_CHG;
ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT);
}
di->chg_info.prev_conn_chg = di->chg_info.conn_chg;
di->susp_status.suspended_change = false;
}
return di->chg_info.conn_chg;
}
@ -1281,12 +1256,6 @@ static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di)
}
}
/* If suspended, we should not continue checking the flags */
else if (di->charge_state == STATE_SUSPENDED_INIT ||
di->charge_state == STATE_SUSPENDED) {
/* We don't do anything here, just don,t continue */
}
/* Safety timer expiration */
else if (di->events.safety_timer_expired) {
if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED)
@ -1384,23 +1353,6 @@ static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di)
case STATE_HANDHELD:
break;
case STATE_SUSPENDED_INIT:
if (di->susp_status.ac_suspended)
ab8500_chargalg_ac_en(di, false, 0, 0);
if (di->susp_status.usb_suspended)
ab8500_chargalg_usb_en(di, false, 0, 0);
ab8500_chargalg_stop_safety_timer(di);
ab8500_chargalg_stop_maintenance_timer(di);
di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
di->maintenance_chg = false;
ab8500_chargalg_state_to(di, STATE_SUSPENDED);
power_supply_changed(di->chargalg_psy);
fallthrough;
case STATE_SUSPENDED:
/* CHARGING is suspended */
break;
case STATE_BATT_REMOVED_INIT:
ab8500_chargalg_stop_charging(di);
ab8500_chargalg_state_to(di, STATE_BATT_REMOVED);
@ -1684,144 +1636,6 @@ static int ab8500_chargalg_get_property(struct power_supply *psy,
return 0;
}
/* Exposure to the sysfs interface */
static ssize_t ab8500_chargalg_en_show(struct ab8500_chargalg *di,
char *buf)
{
return sprintf(buf, "%d\n",
di->susp_status.ac_suspended &&
di->susp_status.usb_suspended);
}
static ssize_t ab8500_chargalg_en_store(struct ab8500_chargalg *di,
const char *buf, size_t length)
{
long param;
int ac_usb;
int ret;
ret = kstrtol(buf, 10, &param);
if (ret < 0)
return ret;
ac_usb = param;
switch (ac_usb) {
case 0:
/* Disable charging */
di->susp_status.ac_suspended = true;
di->susp_status.usb_suspended = true;
di->susp_status.suspended_change = true;
/* Trigger a state change */
queue_work(di->chargalg_wq,
&di->chargalg_work);
break;
case 1:
/* Enable AC Charging */
di->susp_status.ac_suspended = false;
di->susp_status.suspended_change = true;
/* Trigger a state change */
queue_work(di->chargalg_wq,
&di->chargalg_work);
break;
case 2:
/* Enable USB charging */
di->susp_status.usb_suspended = false;
di->susp_status.suspended_change = true;
/* Trigger a state change */
queue_work(di->chargalg_wq,
&di->chargalg_work);
break;
default:
dev_info(di->dev, "Wrong input\n"
"Enter 0. Disable AC/USB Charging\n"
"1. Enable AC charging\n"
"2. Enable USB Charging\n");
}
return strlen(buf);
}
static struct ab8500_chargalg_sysfs_entry ab8500_chargalg_en_charger =
__ATTR(chargalg, 0644, ab8500_chargalg_en_show,
ab8500_chargalg_en_store);
static ssize_t ab8500_chargalg_sysfs_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct ab8500_chargalg_sysfs_entry *entry = container_of(attr,
struct ab8500_chargalg_sysfs_entry, attr);
struct ab8500_chargalg *di = container_of(kobj,
struct ab8500_chargalg, chargalg_kobject);
if (!entry->show)
return -EIO;
return entry->show(di, buf);
}
static ssize_t ab8500_chargalg_sysfs_charger(struct kobject *kobj,
struct attribute *attr, const char *buf, size_t length)
{
struct ab8500_chargalg_sysfs_entry *entry = container_of(attr,
struct ab8500_chargalg_sysfs_entry, attr);
struct ab8500_chargalg *di = container_of(kobj,
struct ab8500_chargalg, chargalg_kobject);
if (!entry->store)
return -EIO;
return entry->store(di, buf, length);
}
static struct attribute *ab8500_chargalg_chg[] = {
&ab8500_chargalg_en_charger.attr,
NULL,
};
static const struct sysfs_ops ab8500_chargalg_sysfs_ops = {
.show = ab8500_chargalg_sysfs_show,
.store = ab8500_chargalg_sysfs_charger,
};
static struct kobj_type ab8500_chargalg_ktype = {
.sysfs_ops = &ab8500_chargalg_sysfs_ops,
.default_attrs = ab8500_chargalg_chg,
};
/**
* ab8500_chargalg_sysfs_exit() - de-init of sysfs entry
* @di: pointer to the struct ab8500_chargalg
*
* This function removes the entry in sysfs.
*/
static void ab8500_chargalg_sysfs_exit(struct ab8500_chargalg *di)
{
kobject_del(&di->chargalg_kobject);
}
/**
* ab8500_chargalg_sysfs_init() - init of sysfs entry
* @di: pointer to the struct ab8500_chargalg
*
* This function adds an entry in sysfs.
* Returns error code in case of failure else 0(on success)
*/
static int ab8500_chargalg_sysfs_init(struct ab8500_chargalg *di)
{
int ret = 0;
ret = kobject_init_and_add(&di->chargalg_kobject,
&ab8500_chargalg_ktype,
NULL, "ab8500_chargalg");
if (ret < 0)
dev_err(di->dev, "failed to create sysfs entry\n");
return ret;
}
/* Exposure to the sysfs interface <<END>> */
static int __maybe_unused ab8500_chargalg_resume(struct device *dev)
{
struct ab8500_chargalg *di = dev_get_drvdata(dev);
@ -1911,7 +1725,6 @@ static int ab8500_chargalg_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct power_supply_config psy_cfg = {};
struct ab8500_chargalg *di;
int ret = 0;
di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
if (!di)
@ -1959,26 +1772,14 @@ static int ab8500_chargalg_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, di);
/* sysfs interface to enable/disable charging from user space */
ret = ab8500_chargalg_sysfs_init(di);
if (ret) {
dev_err(di->dev, "failed to create sysfs entry\n");
return ret;
}
dev_info(di->dev, "probe success\n");
return component_add(dev, &ab8500_chargalg_component_ops);
}
static int ab8500_chargalg_remove(struct platform_device *pdev)
{
struct ab8500_chargalg *di = platform_get_drvdata(pdev);
component_del(&pdev->dev, &ab8500_chargalg_component_ops);
/* sysfs interface to enable/disable charging from user space */
ab8500_chargalg_sysfs_exit(di);
return 0;
}