[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / ibmpowernv.c

/*
 * IBM PowerNV platform sensors for temperature/fan/voltage/power
 * Copyright (C) 2014 IBM
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.
 */

#define DRVNAME		"ibmpowernv"
#define pr_fmt(fmt)	DRVNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/of.h>
#include <linux/slab.h>

#include <linux/platform_device.h>
#include <asm/opal.h>
#include <linux/err.h>

#define MAX_ATTR_LEN	32

/* Sensor suffix name from DT */
#define DT_FAULT_ATTR_SUFFIX		"faulted"
#define DT_DATA_ATTR_SUFFIX		"data"
#define DT_THRESHOLD_ATTR_SUFFIX	"thrs"

/*
 * Enumerates all the types of sensors in the POWERNV platform and does index
 * into 'struct sensor_group'
 */
enum sensors {
	FAN,
	TEMP,
	POWER_SUPPLY,
	POWER_INPUT,
	MAX_SENSOR_TYPE,
};

#define INVALID_INDEX (-1U)

static struct sensor_group {
	const char *name;
	const char *compatible;
	struct attribute_group group;
	u32 attr_count;
	u32 hwmon_index;
} sensor_groups[] = {
	{"fan", "ibm,opal-sensor-cooling-fan"},
	{"temp", "ibm,opal-sensor-amb-temp"},
	{"in", "ibm,opal-sensor-power-supply"},
	{"power", "ibm,opal-sensor-power"}
};

struct sensor_data {
	u32 id; /* An opaque id of the firmware for each sensor */
	u32 hwmon_index;
	u32 opal_index;
	enum sensors type;
	char name[MAX_ATTR_LEN];
	struct device_attribute dev_attr;
};

struct platform_data {
	const struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1];
	u32 sensors_count; /* Total count of sensors from each group */
};

static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr,
			   char *buf)
{
	struct sensor_data *sdata = container_of(devattr, struct sensor_data,
						 dev_attr);
	ssize_t ret;
	u32 x;

	ret = opal_get_sensor_data(sdata->id, &x);
	if (ret)
		return ret;

	/* Convert temperature to milli-degrees */
	if (sdata->type == TEMP)
		x *= 1000;
	/* Convert power to micro-watts */
	else if (sdata->type == POWER_INPUT)
		x *= 1000000;

	return sprintf(buf, "%u\n", x);
}

static int get_sensor_index_attr(const char *name, u32 *index,
					char *attr)
{
	char *hash_pos = strchr(name, '#');
	char buf[8] = { 0 };
	char *dash_pos;
	u32 copy_len;
	int err;

	if (!hash_pos)
		return -EINVAL;

	dash_pos = strchr(hash_pos, '-');
	if (!dash_pos)
		return -EINVAL;

	copy_len = dash_pos - hash_pos - 1;
	if (copy_len >= sizeof(buf))
		return -EINVAL;

	strncpy(buf, hash_pos + 1, copy_len);

	err = kstrtou32(buf, 10, index);
	if (err)
		return err;

	strncpy(attr, dash_pos + 1, MAX_ATTR_LEN);

	return 0;
}

static const char *convert_opal_attr_name(enum sensors type,
					  const char *opal_attr)
{
	const char *attr_name = NULL;

	if (!strcmp(opal_attr, DT_FAULT_ATTR_SUFFIX)) {
		attr_name = "fault";
	} else if (!strcmp(opal_attr, DT_DATA_ATTR_SUFFIX)) {
		attr_name = "input";
	} else if (!strcmp(opal_attr, DT_THRESHOLD_ATTR_SUFFIX)) {
		if (type == TEMP)
			attr_name = "max";
		else if (type == FAN)
			attr_name = "min";
	}

	return attr_name;
}

/*
 * This function translates the DT node name into the 'hwmon' attribute name.
 * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc.
 * which need to be mapped as fan2_input, temp1_max respectively before
 * populating them inside hwmon device class.
 */
static const char *parse_opal_node_name(const char *node_name,
					enum sensors type, u32 *index)
{
	char attr_suffix[MAX_ATTR_LEN];
	const char *attr_name;
	int err;

	err = get_sensor_index_attr(node_name, index, attr_suffix);
	if (err)
		return ERR_PTR(err);

	attr_name = convert_opal_attr_name(type, attr_suffix);
	if (!attr_name)
		return ERR_PTR(-ENOENT);

	return attr_name;
}

static int get_sensor_type(struct device_node *np)
{
	enum sensors type;
	const char *str;

	for (type = 0; type < MAX_SENSOR_TYPE; type++) {
		if (of_device_is_compatible(np, sensor_groups[type].compatible))
			return type;
	}

	/*
	 * Let's check if we have a newer device tree
	 */
	if (!of_device_is_compatible(np, "ibm,opal-sensor"))
		return MAX_SENSOR_TYPE;

	if (of_property_read_string(np, "sensor-type", &str))
		return MAX_SENSOR_TYPE;

	for (type = 0; type < MAX_SENSOR_TYPE; type++)
		if (!strcmp(str, sensor_groups[type].name))
			return type;

	return MAX_SENSOR_TYPE;
}

static u32 get_sensor_hwmon_index(struct sensor_data *sdata,
				  struct sensor_data *sdata_table, int count)
{
	int i;

	/*
	 * We don't use the OPAL index on newer device trees
	 */
	if (sdata->opal_index != INVALID_INDEX) {
		for (i = 0; i < count; i++)
			if (sdata_table[i].opal_index == sdata->opal_index &&
			    sdata_table[i].type == sdata->type)
				return sdata_table[i].hwmon_index;
	}
	return ++sensor_groups[sdata->type].hwmon_index;
}

static int populate_attr_groups(struct platform_device *pdev)
{
	struct platform_data *pdata = platform_get_drvdata(pdev);
	const struct attribute_group **pgroups = pdata->attr_groups;
	struct device_node *opal, *np;
	enum sensors type;

	opal = of_find_node_by_path("/ibm,opal/sensors");
	for_each_child_of_node(opal, np) {
		if (np->name == NULL)
			continue;

		type = get_sensor_type(np);
		if (type != MAX_SENSOR_TYPE)
			sensor_groups[type].attr_count++;
	}

	of_node_put(opal);

	for (type = 0; type < MAX_SENSOR_TYPE; type++) {
		sensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev,
					sizeof(struct attribute *) *
					(sensor_groups[type].attr_count + 1),
					GFP_KERNEL);
		if (!sensor_groups[type].group.attrs)
			return -ENOMEM;

		pgroups[type] = &sensor_groups[type].group;
		pdata->sensors_count += sensor_groups[type].attr_count;
		sensor_groups[type].attr_count = 0;
	}

	return 0;
}

static void create_hwmon_attr(struct sensor_data *sdata, const char *attr_name,
			      ssize_t (*show)(struct device *dev,
					      struct device_attribute *attr,
					      char *buf))
{
	snprintf(sdata->name, MAX_ATTR_LEN, "%s%d_%s",
		 sensor_groups[sdata->type].name, sdata->hwmon_index,
		 attr_name);

	sysfs_attr_init(&sdata->dev_attr.attr);
	sdata->dev_attr.attr.name = sdata->name;
	sdata->dev_attr.attr.mode = S_IRUGO;
	sdata->dev_attr.show = show;
}

/*
 * Iterate through the device tree for each child of 'sensors' node, create
 * a sysfs attribute file, the file is named by translating the DT node name
 * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max
 * etc..
 */
static int create_device_attrs(struct platform_device *pdev)
{
	struct platform_data *pdata = platform_get_drvdata(pdev);
	const struct attribute_group **pgroups = pdata->attr_groups;
	struct device_node *opal, *np;
	struct sensor_data *sdata;
	u32 sensor_id;
	enum sensors type;
	u32 count = 0;
	int err = 0;

	opal = of_find_node_by_path("/ibm,opal/sensors");
	sdata = devm_kzalloc(&pdev->dev, pdata->sensors_count * sizeof(*sdata),
			     GFP_KERNEL);
	if (!sdata) {
		err = -ENOMEM;
		goto exit_put_node;
	}

	for_each_child_of_node(opal, np) {
		const char *attr_name;
		u32 opal_index;

		if (np->name == NULL)
			continue;

		type = get_sensor_type(np);
		if (type == MAX_SENSOR_TYPE)
			continue;

		/*
		 * Newer device trees use a "sensor-data" property
		 * name for input.
		 */
		if (of_property_read_u32(np, "sensor-id", &sensor_id) &&
		    of_property_read_u32(np, "sensor-data", &sensor_id)) {
			dev_info(&pdev->dev,
				 "'sensor-id' missing in the node '%s'\n",
				 np->name);
			continue;
		}

		sdata[count].id = sensor_id;
		sdata[count].type = type;

		/*
		 * If we can not parse the node name, it means we are
		 * running on a newer device tree. We can just forget
		 * about the OPAL index and use a defaut value for the
		 * hwmon attribute name
		 */
		attr_name = parse_opal_node_name(np->name, type, &opal_index);
		if (IS_ERR(attr_name)) {
			attr_name = "input";
			opal_index = INVALID_INDEX;
		}

		sdata[count].opal_index = opal_index;
		sdata[count].hwmon_index =
			get_sensor_hwmon_index(&sdata[count], sdata, count);

		create_hwmon_attr(&sdata[count], attr_name, show_sensor);

		pgroups[type]->attrs[sensor_groups[type].attr_count++] =
				&sdata[count++].dev_attr.attr;
	}

exit_put_node:
	of_node_put(opal);
	return err;
}

static int ibmpowernv_probe(struct platform_device *pdev)
{
	struct platform_data *pdata;
	struct device *hwmon_dev;
	int err;

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	platform_set_drvdata(pdev, pdata);
	pdata->sensors_count = 0;
	err = populate_attr_groups(pdev);
	if (err)
		return err;

	/* Create sysfs attribute data for each sensor found in the DT */
	err = create_device_attrs(pdev);
	if (err)
		return err;

	/* Finally, register with hwmon */
	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME,
							   pdata,
							   pdata->attr_groups);

	return PTR_ERR_OR_ZERO(hwmon_dev);
}

static const struct platform_device_id opal_sensor_driver_ids[] = {
	{
		.name = "opal-sensor",
	},
	{ }
};
MODULE_DEVICE_TABLE(platform, opal_sensor_driver_ids);

static struct platform_driver ibmpowernv_driver = {
	.probe		= ibmpowernv_probe,
	.id_table	= opal_sensor_driver_ids,
	.driver		= {
		.name	= DRVNAME,
	},
};

module_platform_driver(ibmpowernv_driver);

MODULE_AUTHOR("Neelesh Gupta <neelegup@linux.vnet.ibm.com>");
MODULE_DESCRIPTION("IBM POWERNV platform sensors");
MODULE_LICENSE("GPL");
Commit	Line	Data
24c1aa85 NG	1	/*
	2	* IBM PowerNV platform sensors for temperature/fan/voltage/power
	3	* Copyright (C) 2014 IBM
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program.
	17	*/
	18
	19	#define DRVNAME "ibmpowernv"
	20	#define pr_fmt(fmt) DRVNAME ": " fmt
	21
	22	#include <linux/init.h>
	23	#include <linux/module.h>
	24	#include <linux/kernel.h>
	25	#include <linux/hwmon.h>
	26	#include <linux/hwmon-sysfs.h>
	27	#include <linux/of.h>
	28	#include <linux/slab.h>
	29
	30	#include <linux/platform_device.h>
	31	#include <asm/opal.h>
	32	#include <linux/err.h>
	33
	34	#define MAX_ATTR_LEN 32
	35
	36	/* Sensor suffix name from DT */
	37	#define DT_FAULT_ATTR_SUFFIX "faulted"
	38	#define DT_DATA_ATTR_SUFFIX "data"
	39	#define DT_THRESHOLD_ATTR_SUFFIX "thrs"
	40
	41	/*
	42	* Enumerates all the types of sensors in the POWERNV platform and does index
	43	* into 'struct sensor_group'
	44	*/
	45	enum sensors {
	46	FAN,
96124610	47	TEMP,
24c1aa85 NG	48	POWER_SUPPLY,
	49	POWER_INPUT,
	50	MAX_SENSOR_TYPE,
	51	};
	52
14681637 CLG	53	#define INVALID_INDEX (-1U)
14681637 CLG	54
24c1aa85 NG	55	static struct sensor_group {
	56	const char *name;
	57	const char *compatible;
	58	struct attribute_group group;
	59	u32 attr_count;
fcaf57b6	60	u32 hwmon_index;
24c1aa85 NG	61	} sensor_groups[] = {
	62	{"fan", "ibm,opal-sensor-cooling-fan"},
	63	{"temp", "ibm,opal-sensor-amb-temp"},
	64	{"in", "ibm,opal-sensor-power-supply"},
	65	{"power", "ibm,opal-sensor-power"}
	66	};
	67
	68	struct sensor_data {
	69	u32 id; /* An opaque id of the firmware for each sensor */
fcaf57b6 CLG	70	u32 hwmon_index;
fcaf57b6 CLG	71	u32 opal_index;
24c1aa85 NG	72	enum sensors type;
	73	char name[MAX_ATTR_LEN];
	74	struct device_attribute dev_attr;
	75	};
	76
	77	struct platform_data {
	78	const struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1];
	79	u32 sensors_count; /* Total count of sensors from each group */
	80	};
	81
24c1aa85 NG	82	static ssize_t show_sensor(struct device dev, struct device_attribute devattr,
	83	char *buf)
	84	{
	85	struct sensor_data *sdata = container_of(devattr, struct sensor_data,
	86	dev_attr);
	87	ssize_t ret;
	88	u32 x;
	89
	90	ret = opal_get_sensor_data(sdata->id, &x);
	91	if (ret)
	92	return ret;
	93
	94	/* Convert temperature to milli-degrees */
96124610	95	if (sdata->type == TEMP)
24c1aa85 NG	96	x *= 1000;
	97	/* Convert power to micro-watts */
	98	else if (sdata->type == POWER_INPUT)
	99	x *= 1000000;
	100
	101	return sprintf(buf, "%u\n", x);
	102	}
	103
8de303ba	104	static int get_sensor_index_attr(const char name, u32 index,
24c1aa85 NG	105	char *attr)
	106	{
	107	char *hash_pos = strchr(name, '#');
	108	char buf[8] = { 0 };
	109	char *dash_pos;
	110	u32 copy_len;
	111	int err;
	112
	113	if (!hash_pos)
	114	return -EINVAL;
	115
	116	dash_pos = strchr(hash_pos, '-');
	117	if (!dash_pos)
	118	return -EINVAL;
	119
	120	copy_len = dash_pos - hash_pos - 1;
	121	if (copy_len >= sizeof(buf))
	122	return -EINVAL;
	123
	124	strncpy(buf, hash_pos + 1, copy_len);
	125
	126	err = kstrtou32(buf, 10, index);
	127	if (err)
	128	return err;
	129
	130	strncpy(attr, dash_pos + 1, MAX_ATTR_LEN);
	131
	132	return 0;
	133	}
	134
ccc9ac6c CLG	135	static const char *convert_opal_attr_name(enum sensors type,
	136	const char *opal_attr)
	137	{
	138	const char *attr_name = NULL;
	139
	140	if (!strcmp(opal_attr, DT_FAULT_ATTR_SUFFIX)) {
	141	attr_name = "fault";
	142	} else if (!strcmp(opal_attr, DT_DATA_ATTR_SUFFIX)) {
	143	attr_name = "input";
	144	} else if (!strcmp(opal_attr, DT_THRESHOLD_ATTR_SUFFIX)) {
	145	if (type == TEMP)
	146	attr_name = "max";
	147	else if (type == FAN)
	148	attr_name = "min";
	149	}
	150
	151	return attr_name;
	152	}
	153
24c1aa85 NG	154	/*
	155	* This function translates the DT node name into the 'hwmon' attribute name.
	156	* IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc.
	157	* which need to be mapped as fan2_input, temp1_max respectively before
	158	* populating them inside hwmon device class.
	159	*/
f9f54f16 CLG	160	static const char parse_opal_node_name(const char node_name,
f9f54f16 CLG	161	enum sensors type, u32 *index)
24c1aa85 NG	162	{
24c1aa85 NG	163	char attr_suffix[MAX_ATTR_LEN];
ccc9ac6c	164	const char *attr_name;
24c1aa85 NG	165	int err;
24c1aa85 NG	166
f9f54f16 CLG	167	err = get_sensor_index_attr(node_name, index, attr_suffix);
	168	if (err)
	169	return ERR_PTR(err);
24c1aa85	170
ccc9ac6c CLG	171	attr_name = convert_opal_attr_name(type, attr_suffix);
ccc9ac6c CLG	172	if (!attr_name)
f9f54f16	173	return ERR_PTR(-ENOENT);
24c1aa85	174
f9f54f16	175	return attr_name;
24c1aa85 NG	176	}
24c1aa85 NG	177
c4ad4720 CLG	178	static int get_sensor_type(struct device_node *np)
	179	{
	180	enum sensors type;
14681637	181	const char *str;
c4ad4720 CLG	182
	183	for (type = 0; type < MAX_SENSOR_TYPE; type++) {
	184	if (of_device_is_compatible(np, sensor_groups[type].compatible))
	185	return type;
	186	}
14681637 CLG	187
	188	/*
	189	* Let's check if we have a newer device tree
	190	*/
	191	if (!of_device_is_compatible(np, "ibm,opal-sensor"))
	192	return MAX_SENSOR_TYPE;
	193
	194	if (of_property_read_string(np, "sensor-type", &str))
	195	return MAX_SENSOR_TYPE;
	196
	197	for (type = 0; type < MAX_SENSOR_TYPE; type++)
	198	if (!strcmp(str, sensor_groups[type].name))
	199	return type;
	200
c4ad4720 CLG	201	return MAX_SENSOR_TYPE;
	202	}
	203
fcaf57b6 CLG	204	static u32 get_sensor_hwmon_index(struct sensor_data *sdata,
	205	struct sensor_data *sdata_table, int count)
	206	{
	207	int i;
	208
14681637 CLG	209	/*
	210	* We don't use the OPAL index on newer device trees
	211	*/
	212	if (sdata->opal_index != INVALID_INDEX) {
	213	for (i = 0; i < count; i++)
	214	if (sdata_table[i].opal_index == sdata->opal_index &&
	215	sdata_table[i].type == sdata->type)
	216	return sdata_table[i].hwmon_index;
	217	}
fcaf57b6 CLG	218	return ++sensor_groups[sdata->type].hwmon_index;
	219	}
	220
8de303ba	221	static int populate_attr_groups(struct platform_device *pdev)
24c1aa85 NG	222	{
	223	struct platform_data *pdata = platform_get_drvdata(pdev);
	224	const struct attribute_group **pgroups = pdata->attr_groups;
	225	struct device_node opal, np;
	226	enum sensors type;
	227
	228	opal = of_find_node_by_path("/ibm,opal/sensors");
24c1aa85 NG	229	for_each_child_of_node(opal, np) {
	230	if (np->name == NULL)
	231	continue;
	232
c4ad4720 CLG	233	type = get_sensor_type(np);
	234	if (type != MAX_SENSOR_TYPE)
	235	sensor_groups[type].attr_count++;
24c1aa85 NG	236	}
	237
	238	of_node_put(opal);
	239
	240	for (type = 0; type < MAX_SENSOR_TYPE; type++) {
	241	sensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev,
	242	sizeof(struct attribute )
	243	(sensor_groups[type].attr_count + 1),
	244	GFP_KERNEL);
	245	if (!sensor_groups[type].group.attrs)
	246	return -ENOMEM;
	247
	248	pgroups[type] = &sensor_groups[type].group;
	249	pdata->sensors_count += sensor_groups[type].attr_count;
	250	sensor_groups[type].attr_count = 0;
	251	}
	252
	253	return 0;
	254	}
	255
9e4f74b1 CLG	256	static void create_hwmon_attr(struct sensor_data sdata, const char attr_name,
	257	ssize_t (show)(struct device dev,
	258	struct device_attribute *attr,
	259	char *buf))
	260	{
	261	snprintf(sdata->name, MAX_ATTR_LEN, "%s%d_%s",
	262	sensor_groups[sdata->type].name, sdata->hwmon_index,
	263	attr_name);
	264
	265	sysfs_attr_init(&sdata->dev_attr.attr);
	266	sdata->dev_attr.attr.name = sdata->name;
	267	sdata->dev_attr.attr.mode = S_IRUGO;
	268	sdata->dev_attr.show = show;
	269	}
	270
24c1aa85 NG	271	/*
	272	* Iterate through the device tree for each child of 'sensors' node, create
	273	* a sysfs attribute file, the file is named by translating the DT node name
	274	* to the name required by the higher 'hwmon' driver like fan1_input, temp1_max
	275	* etc..
	276	*/
8de303ba	277	static int create_device_attrs(struct platform_device *pdev)
24c1aa85 NG	278	{
	279	struct platform_data *pdata = platform_get_drvdata(pdev);
	280	const struct attribute_group **pgroups = pdata->attr_groups;
	281	struct device_node opal, np;
	282	struct sensor_data *sdata;
18d03f3c	283	u32 sensor_id;
24c1aa85 NG	284	enum sensors type;
	285	u32 count = 0;
	286	int err = 0;
	287
	288	opal = of_find_node_by_path("/ibm,opal/sensors");
	289	sdata = devm_kzalloc(&pdev->dev, pdata->sensors_count * sizeof(*sdata),
	290	GFP_KERNEL);
	291	if (!sdata) {
	292	err = -ENOMEM;
	293	goto exit_put_node;
	294	}
	295
	296	for_each_child_of_node(opal, np) {
f9f54f16 CLG	297	const char *attr_name;
	298	u32 opal_index;
	299
24c1aa85 NG	300	if (np->name == NULL)
	301	continue;
	302
c4ad4720	303	type = get_sensor_type(np);
24c1aa85 NG	304	if (type == MAX_SENSOR_TYPE)
	305	continue;
	306
14681637 CLG	307	/*
	308	* Newer device trees use a "sensor-data" property
	309	* name for input.
	310	*/
	311	if (of_property_read_u32(np, "sensor-id", &sensor_id) &&
	312	of_property_read_u32(np, "sensor-data", &sensor_id)) {
24c1aa85 NG	313	dev_info(&pdev->dev,
	314	"'sensor-id' missing in the node '%s'\n",
	315	np->name);
	316	continue;
	317	}
	318
18d03f3c	319	sdata[count].id = sensor_id;
24c1aa85	320	sdata[count].type = type;
f9f54f16	321
14681637 CLG	322	/*
	323	* If we can not parse the node name, it means we are
	324	* running on a newer device tree. We can just forget
	325	* about the OPAL index and use a defaut value for the
	326	* hwmon attribute name
	327	*/
f9f54f16 CLG	328	attr_name = parse_opal_node_name(np->name, type, &opal_index);
f9f54f16 CLG	329	if (IS_ERR(attr_name)) {
14681637 CLG	330	attr_name = "input";
14681637 CLG	331	opal_index = INVALID_INDEX;
f9f54f16 CLG	332	}
f9f54f16 CLG	333
fcaf57b6 CLG	334	sdata[count].opal_index = opal_index;
	335	sdata[count].hwmon_index =
	336	get_sensor_hwmon_index(&sdata[count], sdata, count);
	337
9e4f74b1	338	create_hwmon_attr(&sdata[count], attr_name, show_sensor);
24c1aa85 NG	339
	340	pgroups[type]->attrs[sensor_groups[type].attr_count++] =
	341	&sdata[count++].dev_attr.attr;
	342	}
	343
	344	exit_put_node:
	345	of_node_put(opal);
	346	return err;
	347	}
	348
8de303ba	349	static int ibmpowernv_probe(struct platform_device *pdev)
24c1aa85 NG	350	{
	351	struct platform_data *pdata;
	352	struct device *hwmon_dev;
	353	int err;
	354
	355	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	356	if (!pdata)
	357	return -ENOMEM;
	358
	359	platform_set_drvdata(pdev, pdata);
	360	pdata->sensors_count = 0;
	361	err = populate_attr_groups(pdev);
	362	if (err)
	363	return err;
	364
	365	/* Create sysfs attribute data for each sensor found in the DT */
	366	err = create_device_attrs(pdev);
	367	if (err)
	368	return err;
	369
	370	/* Finally, register with hwmon */
	371	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME,
	372	pdata,
	373	pdata->attr_groups);
	374
	375	return PTR_ERR_OR_ZERO(hwmon_dev);
	376	}
	377
8de303ba NG	378	static const struct platform_device_id opal_sensor_driver_ids[] = {
	379	{
	380	.name = "opal-sensor",
	381	},
	382	{ }
	383	};
	384	MODULE_DEVICE_TABLE(platform, opal_sensor_driver_ids);
	385
24c1aa85	386	static struct platform_driver ibmpowernv_driver = {
8de303ba NG	387	.probe = ibmpowernv_probe,
	388	.id_table = opal_sensor_driver_ids,
	389	.driver = {
8de303ba	390	.name = DRVNAME,
24c1aa85 NG	391	},
	392	};
	393
3bdec670	394	module_platform_driver(ibmpowernv_driver);
24c1aa85 NG	395
	396	MODULE_AUTHOR("Neelesh Gupta <neelegup@linux.vnet.ibm.com>");
	397	MODULE_DESCRIPTION("IBM POWERNV platform sensors");
	398	MODULE_LICENSE("GPL");