[linux-2.6-block.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/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 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", "Watchdog timer expire",
		"Safety timer expire"
	};
	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->desc->type;
	} else {
		ret = power_supply_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 = kstrtol(buf, 10, &long_val);
	if (ret < 0)
		return ret;

	value.intval = long_val;

	ret = power_supply_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(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(scope),
	POWER_SUPPLY_ATTR(charge_term_current),
	POWER_SUPPLY_ATTR(calibrate),
	/* 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->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;

	dev_dbg(dev, "uevent\n");

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

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

	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]];

		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>
51990e82	15	#include <linux/device.h>
4a11b59d	16	#include <linux/power_supply.h>
5a0e3ad6	17	#include <linux/slab.h>
778f523d	18	#include <linux/stat.h>
4a11b59d	19
25f12141 AB	20	#include "power_supply.h"
25f12141 AB	21
4a11b59d AV	22	/*
	23	* This is because the name "current" breaks the device attr macro.
	24	* The "current" word resolves to "(get_current())" so instead of
	25	* "current" "(get_current())" appears in the sysfs.
	26	*
	27	* The source of this definition is the device.h which calls __ATTR
	28	* macro in sysfs.h which calls the __stringify macro.
	29	*
	30	* Only modification that the name is not tried to be resolved
	31	* (as a macro let's say).
	32	*/
	33
	34	#define POWER_SUPPLY_ATTR(_name) \
	35	{ \
5f487cd3	36	.attr = { .name = #_name }, \
4a11b59d	37	.show = power_supply_show_property, \
0011d2d4	38	.store = power_supply_store_property, \
4a11b59d AV	39	}
	40
	41	static struct device_attribute power_supply_attrs[];
	42
	43	static ssize_t power_supply_show_property(struct device *dev,
	44	struct device_attribute *attr,
	45	char *buf) {
5f487cd3	46	static char *type_text[] = {
9b887227	47	"Unknown", "Battery", "UPS", "Mains", "USB",
85efc8a1	48	"USB_DCP", "USB_CDP", "USB_ACA"
5f487cd3	49	};
4a11b59d AV	50	static char *status_text[] = {
	51	"Unknown", "Charging", "Discharging", "Not charging", "Full"
	52	};
ee8076ed AS	53	static char *charge_type[] = {
	54	"Unknown", "N/A", "Trickle", "Fast"
	55	};
4a11b59d AV	56	static char *health_text[] = {
4a11b59d AV	57	"Unknown", "Good", "Overheat", "Dead", "Over voltage",
a05be991 RP	58	"Unspecified failure", "Cold", "Watchdog timer expire",
a05be991 RP	59	"Safety timer expire"
4a11b59d AV	60	};
4a11b59d AV	61	static char *technology_text[] = {
c7cc930f DB	62	"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
c7cc930f DB	63	"LiMn"
4a11b59d	64	};
b294a290 AS	65	static char *capacity_level_text[] = {
	66	"Unknown", "Critical", "Low", "Normal", "High", "Full"
	67	};
25a0bc2d JF	68	static char *scope_text[] = {
	69	"Unknown", "System", "Device"
	70	};
5f487cd3	71	ssize_t ret = 0;
4a11b59d AV	72	struct power_supply *psy = dev_get_drvdata(dev);
	73	const ptrdiff_t off = attr - power_supply_attrs;
	74	union power_supply_propval value;
	75
73b4a087	76	if (off == POWER_SUPPLY_PROP_TYPE) {
297d716f	77	value.intval = psy->desc->type;
73b4a087	78	} else {
ee8f334a	79	ret = power_supply_get_property(psy, off, &value);
4a11b59d	80
73b4a087 VK	81	if (ret < 0) {
	82	if (ret == -ENODATA)
	83	dev_dbg(dev, "driver has no data for `%s' property\n",
	84	attr->attr.name);
	85	else if (ret != -ENODEV)
	86	dev_err(dev, "driver failed to report `%s' property: %zd\n",
	87	attr->attr.name, ret);
	88	return ret;
	89	}
4a11b59d AV	90	}
	91
	92	if (off == POWER_SUPPLY_PROP_STATUS)
	93	return sprintf(buf, "%s\n", status_text[value.intval]);
ee8076ed AS	94	else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
ee8076ed AS	95	return sprintf(buf, "%s\n", charge_type[value.intval]);
4a11b59d AV	96	else if (off == POWER_SUPPLY_PROP_HEALTH)
	97	return sprintf(buf, "%s\n", health_text[value.intval]);
	98	else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
	99	return sprintf(buf, "%s\n", technology_text[value.intval]);
b294a290 AS	100	else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
b294a290 AS	101	return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
5f487cd3 AV	102	else if (off == POWER_SUPPLY_PROP_TYPE)
5f487cd3 AV	103	return sprintf(buf, "%s\n", type_text[value.intval]);
25a0bc2d JF	104	else if (off == POWER_SUPPLY_PROP_SCOPE)
25a0bc2d JF	105	return sprintf(buf, "%s\n", scope_text[value.intval]);
4a11b59d AV	106	else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
	107	return sprintf(buf, "%s\n", value.strval);
	108
	109	return sprintf(buf, "%d\n", value.intval);
	110	}
	111
0011d2d4 DM	112	static ssize_t power_supply_store_property(struct device *dev,
	113	struct device_attribute *attr,
	114	const char *buf, size_t count) {
	115	ssize_t ret;
	116	struct power_supply *psy = dev_get_drvdata(dev);
	117	const ptrdiff_t off = attr - power_supply_attrs;
	118	union power_supply_propval value;
	119	long long_val;
	120
	121	/* TODO: support other types than int */
f107ae11	122	ret = kstrtol(buf, 10, &long_val);
0011d2d4 DM	123	if (ret < 0)
	124	return ret;
	125
	126	value.intval = long_val;
	127
a9f6a19b	128	ret = power_supply_set_property(psy, off, &value);
0011d2d4 DM	129	if (ret < 0)
	130	return ret;
	131
	132	return count;
	133	}
	134
4a11b59d AV	135	/* Must be in the same order as POWER_SUPPLY_PROP_* */
	136	static struct device_attribute power_supply_attrs[] = {
	137	/* Properties of type `int' */
	138	POWER_SUPPLY_ATTR(status),
ee8076ed	139	POWER_SUPPLY_ATTR(charge_type),
4a11b59d AV	140	POWER_SUPPLY_ATTR(health),
	141	POWER_SUPPLY_ATTR(present),
	142	POWER_SUPPLY_ATTR(online),
b1b56872	143	POWER_SUPPLY_ATTR(authentic),
4a11b59d	144	POWER_SUPPLY_ATTR(technology),
c955fe8e	145	POWER_SUPPLY_ATTR(cycle_count),
c7cc930f DB	146	POWER_SUPPLY_ATTR(voltage_max),
c7cc930f DB	147	POWER_SUPPLY_ATTR(voltage_min),
4a11b59d AV	148	POWER_SUPPLY_ATTR(voltage_max_design),
	149	POWER_SUPPLY_ATTR(voltage_min_design),
	150	POWER_SUPPLY_ATTR(voltage_now),
	151	POWER_SUPPLY_ATTR(voltage_avg),
a2ebfe2f	152	POWER_SUPPLY_ATTR(voltage_ocv),
a8adcc90	153	POWER_SUPPLY_ATTR(voltage_boot),
fe3f6d09	154	POWER_SUPPLY_ATTR(current_max),
4a11b59d AV	155	POWER_SUPPLY_ATTR(current_now),
4a11b59d AV	156	POWER_SUPPLY_ATTR(current_avg),
a8adcc90	157	POWER_SUPPLY_ATTR(current_boot),
7faa144a AS	158	POWER_SUPPLY_ATTR(power_now),
7faa144a AS	159	POWER_SUPPLY_ATTR(power_avg),
4a11b59d AV	160	POWER_SUPPLY_ATTR(charge_full_design),
	161	POWER_SUPPLY_ATTR(charge_empty_design),
	162	POWER_SUPPLY_ATTR(charge_full),
	163	POWER_SUPPLY_ATTR(charge_empty),
	164	POWER_SUPPLY_ATTR(charge_now),
	165	POWER_SUPPLY_ATTR(charge_avg),
8e552c36	166	POWER_SUPPLY_ATTR(charge_counter),
3824c477	167	POWER_SUPPLY_ATTR(constant_charge_current),
2815b786	168	POWER_SUPPLY_ATTR(constant_charge_current_max),
3824c477	169	POWER_SUPPLY_ATTR(constant_charge_voltage),
2815b786	170	POWER_SUPPLY_ATTR(constant_charge_voltage_max),
ea2ce92e RP	171	POWER_SUPPLY_ATTR(charge_control_limit),
ea2ce92e RP	172	POWER_SUPPLY_ATTR(charge_control_limit_max),
6bb1d272	173	POWER_SUPPLY_ATTR(input_current_limit),
4a11b59d AV	174	POWER_SUPPLY_ATTR(energy_full_design),
	175	POWER_SUPPLY_ATTR(energy_empty_design),
	176	POWER_SUPPLY_ATTR(energy_full),
	177	POWER_SUPPLY_ATTR(energy_empty),
	178	POWER_SUPPLY_ATTR(energy_now),
	179	POWER_SUPPLY_ATTR(energy_avg),
	180	POWER_SUPPLY_ATTR(capacity),
e908c418 RP	181	POWER_SUPPLY_ATTR(capacity_alert_min),
e908c418 RP	182	POWER_SUPPLY_ATTR(capacity_alert_max),
b294a290	183	POWER_SUPPLY_ATTR(capacity_level),
4a11b59d	184	POWER_SUPPLY_ATTR(temp),
6bb1d272 JT	185	POWER_SUPPLY_ATTR(temp_max),
6bb1d272 JT	186	POWER_SUPPLY_ATTR(temp_min),
e908c418 RP	187	POWER_SUPPLY_ATTR(temp_alert_min),
e908c418 RP	188	POWER_SUPPLY_ATTR(temp_alert_max),
4a11b59d	189	POWER_SUPPLY_ATTR(temp_ambient),
e908c418 RP	190	POWER_SUPPLY_ATTR(temp_ambient_alert_min),
e908c418 RP	191	POWER_SUPPLY_ATTR(temp_ambient_alert_max),
4a11b59d AV	192	POWER_SUPPLY_ATTR(time_to_empty_now),
	193	POWER_SUPPLY_ATTR(time_to_empty_avg),
	194	POWER_SUPPLY_ATTR(time_to_full_now),
	195	POWER_SUPPLY_ATTR(time_to_full_avg),
5f487cd3	196	POWER_SUPPLY_ATTR(type),
25a0bc2d	197	POWER_SUPPLY_ATTR(scope),
6bb1d272	198	POWER_SUPPLY_ATTR(charge_term_current),
a8adcc90	199	POWER_SUPPLY_ATTR(calibrate),
4a11b59d AV	200	/* Properties of type `const char ' /
	201	POWER_SUPPLY_ATTR(model_name),
	202	POWER_SUPPLY_ATTR(manufacturer),
7c2670bb	203	POWER_SUPPLY_ATTR(serial_number),
4a11b59d AV	204	};
4a11b59d AV	205
5f487cd3 AV	206	static struct attribute *
5f487cd3 AV	207	__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
4a11b59d	208
587a1f16	209	static umode_t power_supply_attr_is_visible(struct kobject *kobj,
5f487cd3 AV	210	struct attribute *attr,
5f487cd3 AV	211	int attrno)
4a11b59d	212	{
5f487cd3 AV	213	struct device *dev = container_of(kobj, struct device, kobj);
5f487cd3 AV	214	struct power_supply *psy = dev_get_drvdata(dev);
587a1f16	215	umode_t mode = S_IRUSR \| S_IRGRP \| S_IROTH;
5f487cd3	216	int i;
4a11b59d	217
bbabb158 DM	218	if (attrno == POWER_SUPPLY_PROP_TYPE)
	219	return mode;
	220
297d716f KK	221	for (i = 0; i < psy->desc->num_properties; i++) {
297d716f KK	222	int property = psy->desc->properties[i];
0011d2d4 DM	223
0011d2d4 DM	224	if (property == attrno) {
297d716f	225	if (psy->desc->property_is_writeable &&
5c6e3a97	226	psy->desc->property_is_writeable(psy, property) > 0)
0011d2d4 DM	227	mode \|= S_IWUSR;
	228
	229	return mode;
	230	}
4a11b59d AV	231	}
4a11b59d AV	232
5f487cd3	233	return 0;
4a11b59d AV	234	}
4a11b59d AV	235
5f487cd3 AV	236	static struct attribute_group power_supply_attr_group = {
	237	.attrs = __power_supply_attrs,
	238	.is_visible = power_supply_attr_is_visible,
	239	};
	240
	241	static const struct attribute_group *power_supply_attr_groups[] = {
	242	&power_supply_attr_group,
	243	NULL,
	244	};
	245
	246	void power_supply_init_attrs(struct device_type *dev_type)
4a11b59d AV	247	{
	248	int i;
	249
5f487cd3	250	dev_type->groups = power_supply_attr_groups;
4a11b59d	251
5f487cd3 AV	252	for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++)
5f487cd3 AV	253	__power_supply_attrs[i] = &power_supply_attrs[i].attr;
4a11b59d AV	254	}
	255
	256	static char kstruprdup(const char str, gfp_t gfp)
	257	{
	258	char ret, ustr;
	259
	260	ustr = ret = kmalloc(strlen(str) + 1, gfp);
	261
	262	if (!ret)
	263	return NULL;
	264
	265	while (*str)
	266	ustr++ = toupper(str++);
	267
	268	*ustr = 0;
	269
	270	return ret;
	271	}
	272
7eff2e7a	273	int power_supply_uevent(struct device dev, struct kobj_uevent_env env)
4a11b59d AV	274	{
4a11b59d AV	275	struct power_supply *psy = dev_get_drvdata(dev);
7eff2e7a	276	int ret = 0, j;
4a11b59d AV	277	char *prop_buf;
	278	char *attrname;
	279
	280	dev_dbg(dev, "uevent\n");
	281
297d716f	282	if (!psy \|\| !psy->desc) {
4a11b59d AV	283	dev_dbg(dev, "No power supply yet\n");
	284	return ret;
	285	}
	286
297d716f	287	dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->desc->name);
4a11b59d	288
297d716f	289	ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name);
4a11b59d AV	290	if (ret)
	291	return ret;
	292
	293	prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
	294	if (!prop_buf)
	295	return -ENOMEM;
	296
297d716f	297	for (j = 0; j < psy->desc->num_properties; j++) {
4a11b59d AV	298	struct device_attribute *attr;
	299	char *line;
	300
297d716f	301	attr = &power_supply_attrs[psy->desc->properties[j]];
4a11b59d AV	302
4a11b59d AV	303	ret = power_supply_show_property(dev, attr, prop_buf);
f722e17f	304	if (ret == -ENODEV \|\| ret == -ENODATA) {
4a11b59d AV	305	/* When a battery is absent, we expect -ENODEV. Don't abort;
	306	send the uevent with at least the the PRESENT=0 property */
	307	ret = 0;
	308	continue;
	309	}
	310
	311	if (ret < 0)
	312	goto out;
	313
	314	line = strchr(prop_buf, '\n');
	315	if (line)
	316	*line = 0;
	317
	318	attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
	319	if (!attrname) {
	320	ret = -ENOMEM;
	321	goto out;
	322	}
	323
	324	dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf);
	325
7eff2e7a	326	ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
4a11b59d AV	327	kfree(attrname);
	328	if (ret)
	329	goto out;
	330	}
	331
	332	out:
	333	free_page((unsigned long)prop_buf);
	334
	335	return ret;
	336	}