/*
 *  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
 *
 *  You may use this code as per GPL version 2
 */

#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"

/*
 * This is because the name "current" breaks the device attr macro.
 * The "current" word resolves to "(get_current())" so instead of
 * "current" "(get_current())" appears in the sysfs.
 *
 * The source of this definition is the device.h which calls __ATTR
 * macro in sysfs.h which calls the __stringify macro.
 *
 * Only modification that the name is not tried to be resolved
 * (as a macro let's say).
 */

#define POWER_SUPPLY_ATTR(_name)					\
{									\
	.attr = { .name = #_name },					\
	.show = power_supply_show_property,				\
	.store = power_supply_store_property,				\
}

static struct device_attribute power_supply_attrs[];

static const char * const power_supply_type_text[] = {
	"Unknown", "Battery", "UPS", "Mains", "USB",
	"USB_DCP", "USB_CDP", "USB_ACA", "USB_C",
	"USB_PD", "USB_PD_DRP", "BrickID",
	"USB_HVDCP", "USB_HVDCP_3", "USB_HVDCP_3P5", "Wireless", "USB_FLOAT",
	"BMS", "Parallel", "Main", "USB_C_UFP", "USB_C_DFP",
	"Charge_Pump",
};

static const char * const power_supply_usb_type_text[] = {
	"Unknown", "SDP", "DCP", "CDP", "ACA", "C",
	"PD", "PD_DRP", "PD_PPS", "BrickID"
};

static const char * const power_supply_status_text[] = {
	"Unknown", "Charging", "Discharging", "Not charging", "Full"
};

static const char * const power_supply_charge_type_text[] = {
	"Unknown", "N/A", "Trickle", "Fast", "Taper"
};

static const char * const power_supply_health_text[] = {
	"Unknown", "Good", "Overheat", "Dead", "Over voltage",
	"Unspecified failure", "Cold", "Watchdog timer expire",
	"Safety timer expire", "Over current", "Warm", "Cool", "Hot"
};

static const char * const power_supply_technology_text[] = {
	"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
	"LiMn"
};

static const char * const power_supply_capacity_level_text[] = {
	"Unknown", "Critical", "Low", "Normal", "High", "Full"
};

static const char * const power_supply_scope_text[] = {
	"Unknown", "System", "Device"
};

static const char * const power_supply_usbc_text[] = {
	"Nothing attached", "Sink attached", "Powered cable w/ sink",
	"Debug Accessory", "Audio Adapter", "Powered cable w/o sink",
	"Source attached (default current)",
	"Source attached (medium current)",
	"Source attached (high current)",
	"Debug Accessory Mode (default current)",
	"Debug Accessory Mode (medium current)",
	"Debug Accessory Mode (high current)",
	"Non compliant",
	"Non compliant (Rp-Default/Rp-Default)",
	"Non compliant (Rp-1.5A/Rp-1.5A)",
	"Non compliant (Rp-3A/Rp-3A)"
};

static const char * const power_supply_usbc_pr_text[] = {
	"none", "dual power role", "sink", "source"
};

static const char * const power_supply_typec_src_rp_text[] = {
	"Rp-Default", "Rp-1.5A", "Rp-3A"
};

static ssize_t power_supply_show_usb_type(struct device *dev,
					  enum power_supply_usb_type *usb_types,
					  ssize_t num_usb_types,
					  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 < num_usb_types; ++i) {
		usb_type = 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);
	enum power_supply_property psp = attr - power_supply_attrs;
	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(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;
		}
	}

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		ret = sprintf(buf, "%s\n",
			      power_supply_status_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		ret = sprintf(buf, "%s\n",
			      power_supply_charge_type_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		ret = sprintf(buf, "%s\n",
			      power_supply_health_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		ret = sprintf(buf, "%s\n",
			      power_supply_technology_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
		ret = sprintf(buf, "%s\n",
			      power_supply_capacity_level_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_TYPE:
	case POWER_SUPPLY_PROP_REAL_TYPE:
		ret = sprintf(buf, "%s\n",
			      power_supply_type_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_USB_TYPE:
		ret = power_supply_show_usb_type(dev, psy->desc->usb_types,
						 psy->desc->num_usb_types,
						 &value, buf);
		break;
	case POWER_SUPPLY_PROP_SCOPE:
		ret = sprintf(buf, "%s\n",
			      power_supply_scope_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_TYPEC_MODE:
		ret = sprintf(buf, "%s\n",
			      power_supply_usbc_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_TYPEC_POWER_ROLE:
		ret = sprintf(buf, "%s\n",
			      power_supply_usbc_pr_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_TYPEC_SRC_RP:
		ret = sprintf(buf, "%s\n",
			      power_supply_typec_src_rp_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_DIE_HEALTH:
	case POWER_SUPPLY_PROP_SKIN_HEALTH:
	case POWER_SUPPLY_PROP_CONNECTOR_HEALTH:
		ret = sprintf(buf, "%s\n",
			      power_supply_health_text[value.intval]);
		break;
	case POWER_SUPPLY_PROP_CHARGE_COUNTER_EXT:
		ret = sprintf(buf, "%lld\n", value.int64val);
		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);
	enum power_supply_property psp = attr - power_supply_attrs;
	union power_supply_propval value;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		ret = sysfs_match_string(power_supply_status_text, buf);
		break;
	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		ret = sysfs_match_string(power_supply_charge_type_text, buf);
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		ret = sysfs_match_string(power_supply_health_text, buf);
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		ret = sysfs_match_string(power_supply_technology_text, buf);
		break;
	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
		ret = sysfs_match_string(power_supply_capacity_level_text, buf);
		break;
	case POWER_SUPPLY_PROP_SCOPE:
		ret = sysfs_match_string(power_supply_scope_text, buf);
		break;
	default:
		ret = -EINVAL;
	}

	/*
	 * 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;
}

/* Must be in the same order as POWER_SUPPLY_PROP_* */
static struct device_attribute power_supply_attrs[] = {
	/* Properties of type `int' */
	POWER_SUPPLY_ATTR(status),
	POWER_SUPPLY_ATTR(charge_type),
	POWER_SUPPLY_ATTR(health),
	POWER_SUPPLY_ATTR(present),
	POWER_SUPPLY_ATTR(online),
	POWER_SUPPLY_ATTR(authentic),
	POWER_SUPPLY_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(input_current_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_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_ATTR(type),
	POWER_SUPPLY_ATTR(usb_type),
	POWER_SUPPLY_ATTR(scope),
	POWER_SUPPLY_ATTR(precharge_current),
	POWER_SUPPLY_ATTR(charge_term_current),
	POWER_SUPPLY_ATTR(calibrate),
	/* Local extensions */
	POWER_SUPPLY_ATTR(usb_hc),
	POWER_SUPPLY_ATTR(usb_otg),
	POWER_SUPPLY_ATTR(charge_enabled),
	POWER_SUPPLY_ATTR(set_ship_mode),
	POWER_SUPPLY_ATTR(real_type),
	POWER_SUPPLY_ATTR(charge_now_raw),
	POWER_SUPPLY_ATTR(charge_now_error),
	POWER_SUPPLY_ATTR(capacity_raw),
	POWER_SUPPLY_ATTR(battery_charging_enabled),
	POWER_SUPPLY_ATTR(charging_enabled),
	POWER_SUPPLY_ATTR(step_charging_enabled),
	POWER_SUPPLY_ATTR(step_charging_step),
	POWER_SUPPLY_ATTR(pin_enabled),
	POWER_SUPPLY_ATTR(input_suspend),
	POWER_SUPPLY_ATTR(input_voltage_regulation),
	POWER_SUPPLY_ATTR(input_current_max),
	POWER_SUPPLY_ATTR(input_current_trim),
	POWER_SUPPLY_ATTR(input_current_settled),
	POWER_SUPPLY_ATTR(input_voltage_settled),
	POWER_SUPPLY_ATTR(bypass_vchg_loop_debouncer),
	POWER_SUPPLY_ATTR(charge_counter_shadow),
	POWER_SUPPLY_ATTR(hi_power),
	POWER_SUPPLY_ATTR(low_power),
	POWER_SUPPLY_ATTR(temp_cool),
	POWER_SUPPLY_ATTR(temp_warm),
	POWER_SUPPLY_ATTR(temp_cold),
	POWER_SUPPLY_ATTR(temp_hot),
	POWER_SUPPLY_ATTR(system_temp_level),
	POWER_SUPPLY_ATTR(resistance),
	POWER_SUPPLY_ATTR(resistance_capacitive),
	POWER_SUPPLY_ATTR(resistance_id),
	POWER_SUPPLY_ATTR(resistance_now),
	POWER_SUPPLY_ATTR(flash_current_max),
	POWER_SUPPLY_ATTR(update_now),
	POWER_SUPPLY_ATTR(esr_count),
	POWER_SUPPLY_ATTR(buck_freq),
	POWER_SUPPLY_ATTR(boost_current),
	POWER_SUPPLY_ATTR(safety_timer_enabled),
	POWER_SUPPLY_ATTR(charge_done),
	POWER_SUPPLY_ATTR(flash_active),
	POWER_SUPPLY_ATTR(flash_trigger),
	POWER_SUPPLY_ATTR(force_tlim),
	POWER_SUPPLY_ATTR(dp_dm),
	POWER_SUPPLY_ATTR(input_current_limited),
	POWER_SUPPLY_ATTR(input_current_now),
	POWER_SUPPLY_ATTR(charge_qnovo_enable),
	POWER_SUPPLY_ATTR(current_qnovo),
	POWER_SUPPLY_ATTR(voltage_qnovo),
	POWER_SUPPLY_ATTR(rerun_aicl),
	POWER_SUPPLY_ATTR(cycle_count_id),
	POWER_SUPPLY_ATTR(safety_timer_expired),
	POWER_SUPPLY_ATTR(restricted_charging),
	POWER_SUPPLY_ATTR(current_capability),
	POWER_SUPPLY_ATTR(typec_mode),
	POWER_SUPPLY_ATTR(typec_cc_orientation),
	POWER_SUPPLY_ATTR(typec_power_role),
	POWER_SUPPLY_ATTR(typec_src_rp),
	POWER_SUPPLY_ATTR(pd_allowed),
	POWER_SUPPLY_ATTR(pd_active),
	POWER_SUPPLY_ATTR(pd_in_hard_reset),
	POWER_SUPPLY_ATTR(pd_current_max),
	POWER_SUPPLY_ATTR(pd_usb_suspend_supported),
	POWER_SUPPLY_ATTR(charger_temp),
	POWER_SUPPLY_ATTR(charger_temp_max),
	POWER_SUPPLY_ATTR(parallel_disable),
	POWER_SUPPLY_ATTR(pe_start),
	POWER_SUPPLY_ATTR(soc_reporting_ready),
	POWER_SUPPLY_ATTR(debug_battery),
	POWER_SUPPLY_ATTR(fcc_delta),
	POWER_SUPPLY_ATTR(icl_reduction),
	POWER_SUPPLY_ATTR(parallel_mode),
	POWER_SUPPLY_ATTR(die_health),
	POWER_SUPPLY_ATTR(connector_health),
	POWER_SUPPLY_ATTR(ctm_current_max),
	POWER_SUPPLY_ATTR(hw_current_max),
	POWER_SUPPLY_ATTR(pr_swap),
	POWER_SUPPLY_ATTR(cc_step),
	POWER_SUPPLY_ATTR(cc_step_sel),
	POWER_SUPPLY_ATTR(sw_jeita_enabled),
	POWER_SUPPLY_ATTR(pd_voltage_max),
	POWER_SUPPLY_ATTR(pd_voltage_min),
	POWER_SUPPLY_ATTR(sdp_current_max),
	POWER_SUPPLY_ATTR(connector_type),
	POWER_SUPPLY_ATTR(parallel_batfet_mode),
	POWER_SUPPLY_ATTR(parallel_fcc_max),
	POWER_SUPPLY_ATTR(min_icl),
	POWER_SUPPLY_ATTR(moisture_detected),
	POWER_SUPPLY_ATTR(batt_profile_version),
	POWER_SUPPLY_ATTR(batt_full_current),
	POWER_SUPPLY_ATTR(recharge_soc),
	POWER_SUPPLY_ATTR(hvdcp_opti_allowed),
	POWER_SUPPLY_ATTR(smb_en_mode),
	POWER_SUPPLY_ATTR(smb_en_reason),
	POWER_SUPPLY_ATTR(esr_actual),
	POWER_SUPPLY_ATTR(esr_nominal),
	POWER_SUPPLY_ATTR(soh),
	POWER_SUPPLY_ATTR(clear_soh),
	POWER_SUPPLY_ATTR(force_recharge),
	POWER_SUPPLY_ATTR(fcc_stepper_enable),
	POWER_SUPPLY_ATTR(toggle_stat),
	POWER_SUPPLY_ATTR(main_fcc_max),
	POWER_SUPPLY_ATTR(fg_reset),
	POWER_SUPPLY_ATTR(qc_opti_disable),
	POWER_SUPPLY_ATTR(cc_soc),
	POWER_SUPPLY_ATTR(batt_age_level),
	POWER_SUPPLY_ATTR(scale_mode_en),
	POWER_SUPPLY_ATTR(voltage_vph),
	POWER_SUPPLY_ATTR(chip_version),
	POWER_SUPPLY_ATTR(therm_icl_limit),
	POWER_SUPPLY_ATTR(dc_reset),
	POWER_SUPPLY_ATTR(voltage_max_limit),
	POWER_SUPPLY_ATTR(real_capacity),
	POWER_SUPPLY_ATTR(force_main_icl),
	POWER_SUPPLY_ATTR(force_main_fcc),
	POWER_SUPPLY_ATTR(comp_clamp_level),
	POWER_SUPPLY_ATTR(adapter_cc_mode),
	POWER_SUPPLY_ATTR(skin_health),
	POWER_SUPPLY_ATTR(charge_disable),
	POWER_SUPPLY_ATTR(adapter_details),
	POWER_SUPPLY_ATTR(dead_battery),
	POWER_SUPPLY_ATTR(voltage_fifo),
	POWER_SUPPLY_ATTR(cc_uah),
	POWER_SUPPLY_ATTR(operating_freq),
	POWER_SUPPLY_ATTR(aicl_delay),
	POWER_SUPPLY_ATTR(aicl_icl),
	POWER_SUPPLY_ATTR(rtx),
	POWER_SUPPLY_ATTR(cutoff_soc),
	POWER_SUPPLY_ATTR(sys_soc),
	POWER_SUPPLY_ATTR(batt_soc),
	/* Capacity Estimation */
	POWER_SUPPLY_ATTR(batt_ce_ctrl),
	POWER_SUPPLY_ATTR(batt_ce_full),
	/* Resistance Estimaton */
	POWER_SUPPLY_ATTR(resistance_avg),
	POWER_SUPPLY_ATTR(batt_res_filt_cnts),
	POWER_SUPPLY_ATTR(aicl_done),
	POWER_SUPPLY_ATTR(voltage_step),
	POWER_SUPPLY_ATTR(otg_fastroleswap),
	POWER_SUPPLY_ATTR(apsd_rerun),
	POWER_SUPPLY_ATTR(apsd_timeout),
	/* Charge pump properties */
	POWER_SUPPLY_ATTR(cp_status1),
	POWER_SUPPLY_ATTR(cp_status2),
	POWER_SUPPLY_ATTR(cp_enable),
	POWER_SUPPLY_ATTR(cp_switcher_en),
	POWER_SUPPLY_ATTR(cp_die_temp),
	POWER_SUPPLY_ATTR(cp_isns),
	POWER_SUPPLY_ATTR(cp_isns_slave),
	POWER_SUPPLY_ATTR(cp_toggle_switcher),
	POWER_SUPPLY_ATTR(cp_irq_status),
	POWER_SUPPLY_ATTR(cp_ilim),
	POWER_SUPPLY_ATTR(irq_status),
	POWER_SUPPLY_ATTR(parallel_output_mode),
	POWER_SUPPLY_ATTR(alignment),
	POWER_SUPPLY_ATTR(moisture_detection_enabled),
	POWER_SUPPLY_ATTR(cc_toggle_enable),
	POWER_SUPPLY_ATTR(fg_type),
	POWER_SUPPLY_ATTR(charger_status),
	/* Local extensions of type int64_t */
	POWER_SUPPLY_ATTR(charge_counter_ext),
	POWER_SUPPLY_ATTR(charge_charger_state),
	/* Properties of type `const char *' */
	POWER_SUPPLY_ATTR(model_name),
	POWER_SUPPLY_ATTR(ptmc_id),
	POWER_SUPPLY_ATTR(manufacturer),
	POWER_SUPPLY_ATTR(battery_type),
	POWER_SUPPLY_ATTR(cycle_counts),
	POWER_SUPPLY_ATTR(serial_number),
};

static struct attribute *
__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];

static umode_t power_supply_attr_is_visible(struct kobject *kobj,
					   struct attribute *attr,
					   int attrno)
{
	struct device *dev = container_of(kobj, struct device, kobj);
	struct power_supply *psy = dev_get_drvdata(dev);
	umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
	int i;

	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 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,
};

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++)
		__power_supply_attrs[i] = &power_supply_attrs[i].attr;
}

static char *kstruprdup(const char *str, gfp_t gfp)
{
	char *ret, *ustr;

	ustr = ret = kmalloc(strlen(str) + 1, gfp);

	if (!ret)
		return NULL;

	while (*str)
		*ustr++ = toupper(*str++);

	*ustr = 0;

	return ret;
}

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;
	char *attrname;

	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;

	for (j = 0; j < psy->desc->num_properties; j++) {
		struct device_attribute *attr;
		char *line;

		attr = &power_supply_attrs[psy->desc->properties[j]];

		if (!attr->attr.name) {
			dev_info(dev, "%s:%d FAKE attr.name=NULL skip\n",
				__FILE__, __LINE__);
			continue;
		}

		ret = power_supply_show_property(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 the PRESENT=0 property */
			ret = 0;
			continue;
		}

		if (ret < 0)
			goto out;

		line = strchr(prop_buf, '\n');
		if (line)
			*line = 0;

		attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
		if (!attrname) {
			ret = -ENOMEM;
			goto out;
		}

		ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
		kfree(attrname);
		if (ret)
			goto out;
	}

out:
	free_page((unsigned long)prop_buf);

	return ret;
}
