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Diffstat (limited to 'drivers/power/supply/power_supply_sysfs.c')
-rw-r--r--drivers/power/supply/power_supply_sysfs.c545
1 files changed, 545 insertions, 0 deletions
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
new file mode 100644
index 000000000..7abd916d0
--- /dev/null
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -0,0 +1,545 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Sysfs interface for the universal power supply monitor class
+ *
+ * Copyright © 2007 David Woodhouse <dwmw2@infradead.org>
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ */
+
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+
+#include "power_supply.h"
+
+#define MAX_PROP_NAME_LEN 30
+
+struct power_supply_attr {
+ const char *prop_name;
+ char attr_name[MAX_PROP_NAME_LEN + 1];
+ struct device_attribute dev_attr;
+ const char * const *text_values;
+ int text_values_len;
+};
+
+#define _POWER_SUPPLY_ATTR(_name, _text, _len) \
+[POWER_SUPPLY_PROP_ ## _name] = \
+{ \
+ .prop_name = #_name, \
+ .attr_name = #_name "\0", \
+ .text_values = _text, \
+ .text_values_len = _len, \
+}
+
+#define POWER_SUPPLY_ATTR(_name) _POWER_SUPPLY_ATTR(_name, NULL, 0)
+#define _POWER_SUPPLY_ENUM_ATTR(_name, _text) \
+ _POWER_SUPPLY_ATTR(_name, _text, ARRAY_SIZE(_text))
+#define POWER_SUPPLY_ENUM_ATTR(_name) \
+ _POWER_SUPPLY_ENUM_ATTR(_name, POWER_SUPPLY_ ## _name ## _TEXT)
+
+static const char * const POWER_SUPPLY_TYPE_TEXT[] = {
+ [POWER_SUPPLY_TYPE_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_TYPE_BATTERY] = "Battery",
+ [POWER_SUPPLY_TYPE_UPS] = "UPS",
+ [POWER_SUPPLY_TYPE_MAINS] = "Mains",
+ [POWER_SUPPLY_TYPE_USB] = "USB",
+ [POWER_SUPPLY_TYPE_USB_DCP] = "USB_DCP",
+ [POWER_SUPPLY_TYPE_USB_CDP] = "USB_CDP",
+ [POWER_SUPPLY_TYPE_USB_ACA] = "USB_ACA",
+ [POWER_SUPPLY_TYPE_USB_TYPE_C] = "USB_C",
+ [POWER_SUPPLY_TYPE_USB_PD] = "USB_PD",
+ [POWER_SUPPLY_TYPE_USB_PD_DRP] = "USB_PD_DRP",
+ [POWER_SUPPLY_TYPE_APPLE_BRICK_ID] = "BrickID",
+ [POWER_SUPPLY_TYPE_WIRELESS] = "Wireless",
+};
+
+static const char * const POWER_SUPPLY_USB_TYPE_TEXT[] = {
+ [POWER_SUPPLY_USB_TYPE_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_USB_TYPE_SDP] = "SDP",
+ [POWER_SUPPLY_USB_TYPE_DCP] = "DCP",
+ [POWER_SUPPLY_USB_TYPE_CDP] = "CDP",
+ [POWER_SUPPLY_USB_TYPE_ACA] = "ACA",
+ [POWER_SUPPLY_USB_TYPE_C] = "C",
+ [POWER_SUPPLY_USB_TYPE_PD] = "PD",
+ [POWER_SUPPLY_USB_TYPE_PD_DRP] = "PD_DRP",
+ [POWER_SUPPLY_USB_TYPE_PD_PPS] = "PD_PPS",
+ [POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID] = "BrickID",
+};
+
+static const char * const POWER_SUPPLY_STATUS_TEXT[] = {
+ [POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_STATUS_CHARGING] = "Charging",
+ [POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging",
+ [POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging",
+ [POWER_SUPPLY_STATUS_FULL] = "Full",
+};
+
+static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = {
+ [POWER_SUPPLY_CHARGE_TYPE_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_CHARGE_TYPE_NONE] = "N/A",
+ [POWER_SUPPLY_CHARGE_TYPE_TRICKLE] = "Trickle",
+ [POWER_SUPPLY_CHARGE_TYPE_FAST] = "Fast",
+ [POWER_SUPPLY_CHARGE_TYPE_STANDARD] = "Standard",
+ [POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE] = "Adaptive",
+ [POWER_SUPPLY_CHARGE_TYPE_CUSTOM] = "Custom",
+ [POWER_SUPPLY_CHARGE_TYPE_LONGLIFE] = "Long Life",
+ [POWER_SUPPLY_CHARGE_TYPE_BYPASS] = "Bypass",
+};
+
+static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
+ [POWER_SUPPLY_HEALTH_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_HEALTH_GOOD] = "Good",
+ [POWER_SUPPLY_HEALTH_OVERHEAT] = "Overheat",
+ [POWER_SUPPLY_HEALTH_DEAD] = "Dead",
+ [POWER_SUPPLY_HEALTH_OVERVOLTAGE] = "Over voltage",
+ [POWER_SUPPLY_HEALTH_UNSPEC_FAILURE] = "Unspecified failure",
+ [POWER_SUPPLY_HEALTH_COLD] = "Cold",
+ [POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE] = "Watchdog timer expire",
+ [POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE] = "Safety timer expire",
+ [POWER_SUPPLY_HEALTH_OVERCURRENT] = "Over current",
+ [POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED] = "Calibration required",
+ [POWER_SUPPLY_HEALTH_WARM] = "Warm",
+ [POWER_SUPPLY_HEALTH_COOL] = "Cool",
+ [POWER_SUPPLY_HEALTH_HOT] = "Hot",
+ [POWER_SUPPLY_HEALTH_NO_BATTERY] = "No battery",
+};
+
+static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
+ [POWER_SUPPLY_TECHNOLOGY_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_TECHNOLOGY_NiMH] = "NiMH",
+ [POWER_SUPPLY_TECHNOLOGY_LION] = "Li-ion",
+ [POWER_SUPPLY_TECHNOLOGY_LIPO] = "Li-poly",
+ [POWER_SUPPLY_TECHNOLOGY_LiFe] = "LiFe",
+ [POWER_SUPPLY_TECHNOLOGY_NiCd] = "NiCd",
+ [POWER_SUPPLY_TECHNOLOGY_LiMn] = "LiMn",
+};
+
+static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = {
+ [POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL] = "Critical",
+ [POWER_SUPPLY_CAPACITY_LEVEL_LOW] = "Low",
+ [POWER_SUPPLY_CAPACITY_LEVEL_NORMAL] = "Normal",
+ [POWER_SUPPLY_CAPACITY_LEVEL_HIGH] = "High",
+ [POWER_SUPPLY_CAPACITY_LEVEL_FULL] = "Full",
+};
+
+static const char * const POWER_SUPPLY_SCOPE_TEXT[] = {
+ [POWER_SUPPLY_SCOPE_UNKNOWN] = "Unknown",
+ [POWER_SUPPLY_SCOPE_SYSTEM] = "System",
+ [POWER_SUPPLY_SCOPE_DEVICE] = "Device",
+};
+
+static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = {
+ [POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto",
+ [POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge",
+ [POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge",
+};
+
+static struct power_supply_attr power_supply_attrs[] = {
+ /* Properties of type `int' */
+ POWER_SUPPLY_ENUM_ATTR(STATUS),
+ POWER_SUPPLY_ENUM_ATTR(CHARGE_TYPE),
+ POWER_SUPPLY_ENUM_ATTR(HEALTH),
+ POWER_SUPPLY_ATTR(PRESENT),
+ POWER_SUPPLY_ATTR(ONLINE),
+ POWER_SUPPLY_ATTR(AUTHENTIC),
+ POWER_SUPPLY_ENUM_ATTR(TECHNOLOGY),
+ POWER_SUPPLY_ATTR(CYCLE_COUNT),
+ POWER_SUPPLY_ATTR(VOLTAGE_MAX),
+ POWER_SUPPLY_ATTR(VOLTAGE_MIN),
+ POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN),
+ POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN),
+ POWER_SUPPLY_ATTR(VOLTAGE_NOW),
+ POWER_SUPPLY_ATTR(VOLTAGE_AVG),
+ POWER_SUPPLY_ATTR(VOLTAGE_OCV),
+ POWER_SUPPLY_ATTR(VOLTAGE_BOOT),
+ POWER_SUPPLY_ATTR(CURRENT_MAX),
+ POWER_SUPPLY_ATTR(CURRENT_NOW),
+ POWER_SUPPLY_ATTR(CURRENT_AVG),
+ POWER_SUPPLY_ATTR(CURRENT_BOOT),
+ POWER_SUPPLY_ATTR(POWER_NOW),
+ POWER_SUPPLY_ATTR(POWER_AVG),
+ POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN),
+ POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN),
+ POWER_SUPPLY_ATTR(CHARGE_FULL),
+ POWER_SUPPLY_ATTR(CHARGE_EMPTY),
+ POWER_SUPPLY_ATTR(CHARGE_NOW),
+ POWER_SUPPLY_ATTR(CHARGE_AVG),
+ POWER_SUPPLY_ATTR(CHARGE_COUNTER),
+ POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT),
+ POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX),
+ POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE),
+ POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX),
+ POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT),
+ POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX),
+ POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD),
+ POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD),
+ POWER_SUPPLY_ENUM_ATTR(CHARGE_BEHAVIOUR),
+ POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT),
+ POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT),
+ POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT),
+ POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN),
+ POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN),
+ POWER_SUPPLY_ATTR(ENERGY_FULL),
+ POWER_SUPPLY_ATTR(ENERGY_EMPTY),
+ POWER_SUPPLY_ATTR(ENERGY_NOW),
+ POWER_SUPPLY_ATTR(ENERGY_AVG),
+ POWER_SUPPLY_ATTR(CAPACITY),
+ POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN),
+ POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX),
+ POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN),
+ POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL),
+ POWER_SUPPLY_ATTR(TEMP),
+ POWER_SUPPLY_ATTR(TEMP_MAX),
+ POWER_SUPPLY_ATTR(TEMP_MIN),
+ POWER_SUPPLY_ATTR(TEMP_ALERT_MIN),
+ POWER_SUPPLY_ATTR(TEMP_ALERT_MAX),
+ POWER_SUPPLY_ATTR(TEMP_AMBIENT),
+ POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN),
+ POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX),
+ POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW),
+ POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG),
+ POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW),
+ POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG),
+ POWER_SUPPLY_ENUM_ATTR(TYPE),
+ POWER_SUPPLY_ATTR(USB_TYPE),
+ POWER_SUPPLY_ENUM_ATTR(SCOPE),
+ POWER_SUPPLY_ATTR(PRECHARGE_CURRENT),
+ POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT),
+ POWER_SUPPLY_ATTR(CALIBRATE),
+ POWER_SUPPLY_ATTR(MANUFACTURE_YEAR),
+ POWER_SUPPLY_ATTR(MANUFACTURE_MONTH),
+ POWER_SUPPLY_ATTR(MANUFACTURE_DAY),
+ /* Properties of type `const char *' */
+ POWER_SUPPLY_ATTR(MODEL_NAME),
+ POWER_SUPPLY_ATTR(MANUFACTURER),
+ POWER_SUPPLY_ATTR(SERIAL_NUMBER),
+};
+
+static struct attribute *
+__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
+
+static struct power_supply_attr *to_ps_attr(struct device_attribute *attr)
+{
+ return container_of(attr, struct power_supply_attr, dev_attr);
+}
+
+static enum power_supply_property dev_attr_psp(struct device_attribute *attr)
+{
+ return to_ps_attr(attr) - power_supply_attrs;
+}
+
+static ssize_t power_supply_show_usb_type(struct device *dev,
+ const struct power_supply_desc *desc,
+ union power_supply_propval *value,
+ char *buf)
+{
+ enum power_supply_usb_type usb_type;
+ ssize_t count = 0;
+ bool match = false;
+ int i;
+
+ for (i = 0; i < desc->num_usb_types; ++i) {
+ usb_type = desc->usb_types[i];
+
+ if (value->intval == usb_type) {
+ count += sprintf(buf + count, "[%s] ",
+ POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
+ match = true;
+ } else {
+ count += sprintf(buf + count, "%s ",
+ POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
+ }
+ }
+
+ if (!match) {
+ dev_warn(dev, "driver reporting unsupported connected type\n");
+ return -EINVAL;
+ }
+
+ if (count)
+ buf[count - 1] = '\n';
+
+ return count;
+}
+
+static ssize_t power_supply_show_property(struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+ ssize_t ret;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct power_supply_attr *ps_attr = to_ps_attr(attr);
+ enum power_supply_property psp = dev_attr_psp(attr);
+ union power_supply_propval value;
+
+ if (psp == POWER_SUPPLY_PROP_TYPE) {
+ value.intval = psy->desc->type;
+ } else {
+ ret = power_supply_get_property(psy, psp, &value);
+
+ if (ret < 0) {
+ if (ret == -ENODATA)
+ dev_dbg_ratelimited(dev,
+ "driver has no data for `%s' property\n",
+ attr->attr.name);
+ else if (ret != -ENODEV && ret != -EAGAIN)
+ dev_err_ratelimited(dev,
+ "driver failed to report `%s' property: %zd\n",
+ attr->attr.name, ret);
+ return ret;
+ }
+ }
+
+ if (ps_attr->text_values_len > 0 &&
+ value.intval < ps_attr->text_values_len && value.intval >= 0) {
+ return sprintf(buf, "%s\n", ps_attr->text_values[value.intval]);
+ }
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ ret = power_supply_show_usb_type(dev, psy->desc,
+ &value, buf);
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
+ ret = sprintf(buf, "%s\n", value.strval);
+ break;
+ default:
+ ret = sprintf(buf, "%d\n", value.intval);
+ }
+
+ return ret;
+}
+
+static ssize_t power_supply_store_property(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+ ssize_t ret;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct power_supply_attr *ps_attr = to_ps_attr(attr);
+ enum power_supply_property psp = dev_attr_psp(attr);
+ union power_supply_propval value;
+
+ ret = -EINVAL;
+ if (ps_attr->text_values_len > 0) {
+ ret = __sysfs_match_string(ps_attr->text_values,
+ ps_attr->text_values_len, buf);
+ }
+
+ /*
+ * If no match was found, then check to see if it is an integer.
+ * Integer values are valid for enums in addition to the text value.
+ */
+ if (ret < 0) {
+ long long_val;
+
+ ret = kstrtol(buf, 10, &long_val);
+ if (ret < 0)
+ return ret;
+
+ ret = long_val;
+ }
+
+ value.intval = ret;
+
+ ret = power_supply_set_property(psy, psp, &value);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static umode_t power_supply_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr,
+ int attrno)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct power_supply *psy = dev_get_drvdata(dev);
+ umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
+ int i;
+
+ if (!power_supply_attrs[attrno].prop_name)
+ return 0;
+
+ if (attrno == POWER_SUPPLY_PROP_TYPE)
+ return mode;
+
+ for (i = 0; i < psy->desc->num_properties; i++) {
+ int property = psy->desc->properties[i];
+
+ if (property == attrno) {
+ if (psy->desc->property_is_writeable &&
+ psy->desc->property_is_writeable(psy, property) > 0)
+ mode |= S_IWUSR;
+
+ return mode;
+ }
+ }
+
+ return 0;
+}
+
+static const struct attribute_group power_supply_attr_group = {
+ .attrs = __power_supply_attrs,
+ .is_visible = power_supply_attr_is_visible,
+};
+
+static const struct attribute_group *power_supply_attr_groups[] = {
+ &power_supply_attr_group,
+ NULL,
+};
+
+static void str_to_lower(char *str)
+{
+ while (*str) {
+ *str = tolower(*str);
+ str++;
+ }
+}
+
+void power_supply_init_attrs(struct device_type *dev_type)
+{
+ int i;
+
+ dev_type->groups = power_supply_attr_groups;
+
+ for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) {
+ struct device_attribute *attr;
+
+ if (!power_supply_attrs[i].prop_name) {
+ pr_warn("%s: Property %d skipped because it is missing from power_supply_attrs\n",
+ __func__, i);
+ sprintf(power_supply_attrs[i].attr_name, "_err_%d", i);
+ } else {
+ str_to_lower(power_supply_attrs[i].attr_name);
+ }
+
+ attr = &power_supply_attrs[i].dev_attr;
+
+ attr->attr.name = power_supply_attrs[i].attr_name;
+ attr->show = power_supply_show_property;
+ attr->store = power_supply_store_property;
+ __power_supply_attrs[i] = &attr->attr;
+ }
+}
+
+static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
+ enum power_supply_property prop, char *prop_buf)
+{
+ int ret = 0;
+ struct power_supply_attr *pwr_attr;
+ struct device_attribute *dev_attr;
+ char *line;
+
+ pwr_attr = &power_supply_attrs[prop];
+ dev_attr = &pwr_attr->dev_attr;
+
+ ret = power_supply_show_property(dev, dev_attr, prop_buf);
+ if (ret == -ENODEV || ret == -ENODATA) {
+ /*
+ * When a battery is absent, we expect -ENODEV. Don't abort;
+ * send the uevent with at least the PRESENT=0 property
+ */
+ return 0;
+ }
+
+ if (ret < 0)
+ return ret;
+
+ line = strchr(prop_buf, '\n');
+ if (line)
+ *line = 0;
+
+ return add_uevent_var(env, "POWER_SUPPLY_%s=%s",
+ pwr_attr->prop_name, prop_buf);
+}
+
+int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ int ret = 0, j;
+ char *prop_buf;
+
+ if (!psy || !psy->desc) {
+ dev_dbg(dev, "No power supply yet\n");
+ return ret;
+ }
+
+ ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name);
+ if (ret)
+ return ret;
+
+ prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!prop_buf)
+ return -ENOMEM;
+
+ ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf);
+ if (ret)
+ goto out;
+
+ for (j = 0; j < psy->desc->num_properties; j++) {
+ ret = add_prop_uevent(dev, env, psy->desc->properties[j],
+ prop_buf);
+ if (ret)
+ goto out;
+ }
+
+out:
+ free_page((unsigned long)prop_buf);
+
+ return ret;
+}
+
+ssize_t power_supply_charge_behaviour_show(struct device *dev,
+ unsigned int available_behaviours,
+ enum power_supply_charge_behaviour current_behaviour,
+ char *buf)
+{
+ bool match = false, available, active;
+ ssize_t count = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) {
+ available = available_behaviours & BIT(i);
+ active = i == current_behaviour;
+
+ if (available && active) {
+ count += sysfs_emit_at(buf, count, "[%s] ",
+ POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
+ match = true;
+ } else if (available) {
+ count += sysfs_emit_at(buf, count, "%s ",
+ POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
+ }
+ }
+
+ if (!match) {
+ dev_warn(dev, "driver reporting unsupported charge behaviour\n");
+ return -EINVAL;
+ }
+
+ if (count)
+ buf[count - 1] = '\n';
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
+
+int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
+{
+ int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf);
+
+ if (i < 0)
+ return i;
+
+ if (available_behaviours & BIT(i))
+ return i;
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse);