[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / power / power_supply_sysfs.c

/*
 *  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/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 ssize_t power_supply_show_property(struct device *dev,
					  struct device_attribute *attr,
					  char *buf) {
	static char *type_text[] = {
		"Unknown", "Battery", "UPS", "Mains", "USB",
		"USB_DCP", "USB_CDP", "USB_ACA"
	};
	static char *status_text[] = {
		"Unknown", "Charging", "Discharging", "Not charging", "Full"
	};
	static char *charge_type[] = {
		"Unknown", "N/A", "Trickle", "Fast"
	};
	static char *health_text[] = {
		"Unknown", "Good", "Overheat", "Dead", "Over voltage",
		"Unspecified failure", "Cold",
	};
	static char *technology_text[] = {
		"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
		"LiMn"
	};
	static char *capacity_level_text[] = {
		"Unknown", "Critical", "Low", "Normal", "High", "Full"
	};
	static char *scope_text[] = {
		"Unknown", "System", "Device"
	};
	ssize_t ret = 0;
	struct power_supply *psy = dev_get_drvdata(dev);
	const ptrdiff_t off = attr - power_supply_attrs;
	union power_supply_propval value;

	if (off == POWER_SUPPLY_PROP_TYPE)
		value.intval = psy->type;
	else
		ret = psy->get_property(psy, off, &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)
			dev_err(dev, "driver failed to report `%s' property: %zd\n",
				attr->attr.name, ret);
		return ret;
	}

	if (off == POWER_SUPPLY_PROP_STATUS)
		return sprintf(buf, "%s\n", status_text[value.intval]);
	else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
		return sprintf(buf, "%s\n", charge_type[value.intval]);
	else if (off == POWER_SUPPLY_PROP_HEALTH)
		return sprintf(buf, "%s\n", health_text[value.intval]);
	else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
		return sprintf(buf, "%s\n", technology_text[value.intval]);
	else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
		return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
	else if (off == POWER_SUPPLY_PROP_TYPE)
		return sprintf(buf, "%s\n", type_text[value.intval]);
	else if (off == POWER_SUPPLY_PROP_SCOPE)
		return sprintf(buf, "%s\n", scope_text[value.intval]);
	else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
		return sprintf(buf, "%s\n", value.strval);

	return sprintf(buf, "%d\n", value.intval);
}

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);
	const ptrdiff_t off = attr - power_supply_attrs;
	union power_supply_propval value;
	long long_val;

	/* TODO: support other types than int */
	ret = strict_strtol(buf, 10, &long_val);
	if (ret < 0)
		return ret;

	value.intval = long_val;

	ret = psy->set_property(psy, off, &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(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(current_max),
	POWER_SUPPLY_ATTR(current_now),
	POWER_SUPPLY_ATTR(current_avg),
	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(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_level),
	POWER_SUPPLY_ATTR(temp),
	POWER_SUPPLY_ATTR(temp_ambient),
	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(scope),
	/* 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 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->num_properties; i++) {
		int property = psy->properties[i];

		if (property == attrno) {
			if (psy->property_is_writeable &&
			    psy->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;

	dev_dbg(dev, "uevent\n");

	if (!psy || !psy->dev) {
		dev_dbg(dev, "No power supply yet\n");
		return ret;
	}

	dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name);

	ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name);
	if (ret)
		return ret;

	prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
	if (!prop_buf)
		return -ENOMEM;

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

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

		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;
		}

		dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf);

		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;
}
Commit	Line	Data
4a11b59d AV	1	/*
	2	* Sysfs interface for the universal power supply monitor class
	3	*
	4	* Copyright © 2007 David Woodhouse <dwmw2@infradead.org>
	5	* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
	6	* Copyright © 2004 Szabolcs Gyurko
	7	* Copyright © 2003 Ian Molton <spyro@f2s.com>
	8	*
	9	* Modified: 2004, Oct Szabolcs Gyurko
	10	*
	11	* You may use this code as per GPL version 2
	12	*/
	13
	14	#include <linux/ctype.h>
	15	#include <linux/power_supply.h>
5a0e3ad6	16	#include <linux/slab.h>
778f523d	17	#include <linux/stat.h>
4a11b59d	18
25f12141 AB	19	#include "power_supply.h"
25f12141 AB	20
4a11b59d AV	21	/*
	22	* This is because the name "current" breaks the device attr macro.
	23	* The "current" word resolves to "(get_current())" so instead of
	24	* "current" "(get_current())" appears in the sysfs.
	25	*
	26	* The source of this definition is the device.h which calls __ATTR
	27	* macro in sysfs.h which calls the __stringify macro.
	28	*
	29	* Only modification that the name is not tried to be resolved
	30	* (as a macro let's say).
	31	*/
	32
	33	#define POWER_SUPPLY_ATTR(_name) \
	34	{ \
5f487cd3	35	.attr = { .name = #_name }, \
4a11b59d	36	.show = power_supply_show_property, \
0011d2d4	37	.store = power_supply_store_property, \
4a11b59d AV	38	}
	39
	40	static struct device_attribute power_supply_attrs[];
	41
	42	static ssize_t power_supply_show_property(struct device *dev,
	43	struct device_attribute *attr,
	44	char *buf) {
5f487cd3	45	static char *type_text[] = {
9b887227	46	"Unknown", "Battery", "UPS", "Mains", "USB",
85efc8a1	47	"USB_DCP", "USB_CDP", "USB_ACA"
5f487cd3	48	};
4a11b59d AV	49	static char *status_text[] = {
	50	"Unknown", "Charging", "Discharging", "Not charging", "Full"
	51	};
ee8076ed AS	52	static char *charge_type[] = {
	53	"Unknown", "N/A", "Trickle", "Fast"
	54	};
4a11b59d AV	55	static char *health_text[] = {
4a11b59d AV	56	"Unknown", "Good", "Overheat", "Dead", "Over voltage",
7e386e6e	57	"Unspecified failure", "Cold",
4a11b59d AV	58	};
4a11b59d AV	59	static char *technology_text[] = {
c7cc930f DES	60	"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
c7cc930f DES	61	"LiMn"
4a11b59d	62	};
b294a290 AS	63	static char *capacity_level_text[] = {
	64	"Unknown", "Critical", "Low", "Normal", "High", "Full"
	65	};
25a0bc2d JF	66	static char *scope_text[] = {
	67	"Unknown", "System", "Device"
	68	};
5f487cd3	69	ssize_t ret = 0;
4a11b59d AV	70	struct power_supply *psy = dev_get_drvdata(dev);
	71	const ptrdiff_t off = attr - power_supply_attrs;
	72	union power_supply_propval value;
	73
5f487cd3 AV	74	if (off == POWER_SUPPLY_PROP_TYPE)
	75	value.intval = psy->type;
	76	else
	77	ret = psy->get_property(psy, off, &value);
4a11b59d AV	78
4a11b59d AV	79	if (ret < 0) {
9d233e8b AV	80	if (ret == -ENODATA)
	81	dev_dbg(dev, "driver has no data for `%s' property\n",
	82	attr->attr.name);
	83	else if (ret != -ENODEV)
85b5fbf7	84	dev_err(dev, "driver failed to report `%s' property: %zd\n",
35c3ae5e	85	attr->attr.name, ret);
4a11b59d AV	86	return ret;
	87	}
	88
	89	if (off == POWER_SUPPLY_PROP_STATUS)
	90	return sprintf(buf, "%s\n", status_text[value.intval]);
ee8076ed AS	91	else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
ee8076ed AS	92	return sprintf(buf, "%s\n", charge_type[value.intval]);
4a11b59d AV	93	else if (off == POWER_SUPPLY_PROP_HEALTH)
	94	return sprintf(buf, "%s\n", health_text[value.intval]);
	95	else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
	96	return sprintf(buf, "%s\n", technology_text[value.intval]);
b294a290 AS	97	else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
b294a290 AS	98	return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
5f487cd3 AV	99	else if (off == POWER_SUPPLY_PROP_TYPE)
5f487cd3 AV	100	return sprintf(buf, "%s\n", type_text[value.intval]);
25a0bc2d JF	101	else if (off == POWER_SUPPLY_PROP_SCOPE)
25a0bc2d JF	102	return sprintf(buf, "%s\n", scope_text[value.intval]);
4a11b59d AV	103	else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
	104	return sprintf(buf, "%s\n", value.strval);
	105
	106	return sprintf(buf, "%d\n", value.intval);
	107	}
	108
0011d2d4 DM	109	static ssize_t power_supply_store_property(struct device *dev,
	110	struct device_attribute *attr,
	111	const char *buf, size_t count) {
	112	ssize_t ret;
	113	struct power_supply *psy = dev_get_drvdata(dev);
	114	const ptrdiff_t off = attr - power_supply_attrs;
	115	union power_supply_propval value;
	116	long long_val;
	117
	118	/* TODO: support other types than int */
	119	ret = strict_strtol(buf, 10, &long_val);
	120	if (ret < 0)
	121	return ret;
	122
	123	value.intval = long_val;
	124
	125	ret = psy->set_property(psy, off, &value);
	126	if (ret < 0)
	127	return ret;
	128
	129	return count;
	130	}
	131
4a11b59d AV	132	/* Must be in the same order as POWER_SUPPLY_PROP_* */
	133	static struct device_attribute power_supply_attrs[] = {
	134	/* Properties of type `int' */
	135	POWER_SUPPLY_ATTR(status),
ee8076ed	136	POWER_SUPPLY_ATTR(charge_type),
4a11b59d AV	137	POWER_SUPPLY_ATTR(health),
	138	POWER_SUPPLY_ATTR(present),
	139	POWER_SUPPLY_ATTR(online),
	140	POWER_SUPPLY_ATTR(technology),
c955fe8e	141	POWER_SUPPLY_ATTR(cycle_count),
c7cc930f DES	142	POWER_SUPPLY_ATTR(voltage_max),
c7cc930f DES	143	POWER_SUPPLY_ATTR(voltage_min),
4a11b59d AV	144	POWER_SUPPLY_ATTR(voltage_max_design),
	145	POWER_SUPPLY_ATTR(voltage_min_design),
	146	POWER_SUPPLY_ATTR(voltage_now),
	147	POWER_SUPPLY_ATTR(voltage_avg),
fe3f6d09	148	POWER_SUPPLY_ATTR(current_max),
4a11b59d AV	149	POWER_SUPPLY_ATTR(current_now),
4a11b59d AV	150	POWER_SUPPLY_ATTR(current_avg),
7faa144a AS	151	POWER_SUPPLY_ATTR(power_now),
7faa144a AS	152	POWER_SUPPLY_ATTR(power_avg),
4a11b59d AV	153	POWER_SUPPLY_ATTR(charge_full_design),
	154	POWER_SUPPLY_ATTR(charge_empty_design),
	155	POWER_SUPPLY_ATTR(charge_full),
	156	POWER_SUPPLY_ATTR(charge_empty),
	157	POWER_SUPPLY_ATTR(charge_now),
	158	POWER_SUPPLY_ATTR(charge_avg),
8e552c36	159	POWER_SUPPLY_ATTR(charge_counter),
4a11b59d AV	160	POWER_SUPPLY_ATTR(energy_full_design),
	161	POWER_SUPPLY_ATTR(energy_empty_design),
	162	POWER_SUPPLY_ATTR(energy_full),
	163	POWER_SUPPLY_ATTR(energy_empty),
	164	POWER_SUPPLY_ATTR(energy_now),
	165	POWER_SUPPLY_ATTR(energy_avg),
	166	POWER_SUPPLY_ATTR(capacity),
b294a290	167	POWER_SUPPLY_ATTR(capacity_level),
4a11b59d AV	168	POWER_SUPPLY_ATTR(temp),
	169	POWER_SUPPLY_ATTR(temp_ambient),
	170	POWER_SUPPLY_ATTR(time_to_empty_now),
	171	POWER_SUPPLY_ATTR(time_to_empty_avg),
	172	POWER_SUPPLY_ATTR(time_to_full_now),
	173	POWER_SUPPLY_ATTR(time_to_full_avg),
5f487cd3	174	POWER_SUPPLY_ATTR(type),
25a0bc2d	175	POWER_SUPPLY_ATTR(scope),
4a11b59d AV	176	/* Properties of type `const char ' /
	177	POWER_SUPPLY_ATTR(model_name),
	178	POWER_SUPPLY_ATTR(manufacturer),
7c2670bb	179	POWER_SUPPLY_ATTR(serial_number),
4a11b59d AV	180	};
4a11b59d AV	181
5f487cd3 AV	182	static struct attribute *
5f487cd3 AV	183	__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
4a11b59d	184
587a1f16	185	static umode_t power_supply_attr_is_visible(struct kobject *kobj,
5f487cd3 AV	186	struct attribute *attr,
5f487cd3 AV	187	int attrno)
4a11b59d	188	{
5f487cd3 AV	189	struct device *dev = container_of(kobj, struct device, kobj);
5f487cd3 AV	190	struct power_supply *psy = dev_get_drvdata(dev);
587a1f16	191	umode_t mode = S_IRUSR \| S_IRGRP \| S_IROTH;
5f487cd3	192	int i;
4a11b59d	193
bbabb158 DM	194	if (attrno == POWER_SUPPLY_PROP_TYPE)
	195	return mode;
	196
5f487cd3	197	for (i = 0; i < psy->num_properties; i++) {
0011d2d4 DM	198	int property = psy->properties[i];
	199
	200	if (property == attrno) {
0011d2d4 DM	201	if (psy->property_is_writeable &&
	202	psy->property_is_writeable(psy, property) > 0)
	203	mode \|= S_IWUSR;
	204
	205	return mode;
	206	}
4a11b59d AV	207	}
4a11b59d AV	208
5f487cd3	209	return 0;
4a11b59d AV	210	}
4a11b59d AV	211
5f487cd3 AV	212	static struct attribute_group power_supply_attr_group = {
	213	.attrs = __power_supply_attrs,
	214	.is_visible = power_supply_attr_is_visible,
	215	};
	216
	217	static const struct attribute_group *power_supply_attr_groups[] = {
	218	&power_supply_attr_group,
	219	NULL,
	220	};
	221
	222	void power_supply_init_attrs(struct device_type *dev_type)
4a11b59d AV	223	{
	224	int i;
	225
5f487cd3	226	dev_type->groups = power_supply_attr_groups;
4a11b59d	227
5f487cd3 AV	228	for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++)
5f487cd3 AV	229	__power_supply_attrs[i] = &power_supply_attrs[i].attr;
4a11b59d AV	230	}
	231
	232	static char kstruprdup(const char str, gfp_t gfp)
	233	{
	234	char ret, ustr;
	235
	236	ustr = ret = kmalloc(strlen(str) + 1, gfp);
	237
	238	if (!ret)
	239	return NULL;
	240
	241	while (*str)
	242	ustr++ = toupper(str++);
	243
	244	*ustr = 0;
	245
	246	return ret;
	247	}
	248
7eff2e7a	249	int power_supply_uevent(struct device dev, struct kobj_uevent_env env)
4a11b59d AV	250	{
4a11b59d AV	251	struct power_supply *psy = dev_get_drvdata(dev);
7eff2e7a	252	int ret = 0, j;
4a11b59d AV	253	char *prop_buf;
	254	char *attrname;
	255
	256	dev_dbg(dev, "uevent\n");
	257
56fa18e8	258	if (!psy \|\| !psy->dev) {
4a11b59d AV	259	dev_dbg(dev, "No power supply yet\n");
	260	return ret;
	261	}
	262
	263	dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name);
	264
7eff2e7a	265	ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name);
4a11b59d AV	266	if (ret)
	267	return ret;
	268
	269	prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
	270	if (!prop_buf)
	271	return -ENOMEM;
	272
4a11b59d AV	273	for (j = 0; j < psy->num_properties; j++) {
	274	struct device_attribute *attr;
	275	char *line;
	276
	277	attr = &power_supply_attrs[psy->properties[j]];
	278
	279	ret = power_supply_show_property(dev, attr, prop_buf);
f722e17f	280	if (ret == -ENODEV \|\| ret == -ENODATA) {
4a11b59d AV	281	/* When a battery is absent, we expect -ENODEV. Don't abort;
	282	send the uevent with at least the the PRESENT=0 property */
	283	ret = 0;
	284	continue;
	285	}
	286
	287	if (ret < 0)
	288	goto out;
	289
	290	line = strchr(prop_buf, '\n');
	291	if (line)
	292	*line = 0;
	293
	294	attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
	295	if (!attrname) {
	296	ret = -ENOMEM;
	297	goto out;
	298	}
	299
	300	dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf);
	301
7eff2e7a	302	ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
4a11b59d AV	303	kfree(attrname);
	304	if (ret)
	305	goto out;
	306	}
	307
	308	out:
	309	free_page((unsigned long)prop_buf);
	310
	311	return ret;
	312	}