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diff --git a/a/1.txt b/N1/1.txt
index 0fddcb0..9b0f190 100644
--- a/a/1.txt
+++ b/N1/1.txt
@@ -1,294 +1,538 @@
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+On 05/19/2014 07:26 AM, Neelesh Gupta wrote:
+> This patch adds basic kernel enablement for reading power values, fan
+> speed rpm and temperature values on powernv platforms which will
+> be exported to user space through sysfs interface.
+>
+> Test results:
+> -------------
+> [root@tul163p1 ~]# sensors
+> ibmpowernv-isa-0000
+> Adapter: ISA adapter
+> fan1:        5487 RPM  (min =    0 RPM)
+> fan2:        5152 RPM  (min =    0 RPM)
+> fan3:        5590 RPM  (min =    0 RPM)
+> fan4:        4963 RPM  (min =    0 RPM)
+> fan5:           0 RPM  (min =    0 RPM)
+> fan6:           0 RPM  (min =    0 RPM)
+> fan7:        7488 RPM  (min =    0 RPM)
+> fan8:        7944 RPM  (min =    0 RPM)
+> temp1:        +39.0°C  (high =  +0.0°C)
+> power1:      192.00 W
+>
+> [root@tul163p1 ~]# ls /sys/devices/platform/
+> alarmtimer  ibmpowernv.0  rtc-generic  serial8250  uevent
+> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/
+> driver/    hwmon/     modalias   subsystem/ uevent
+> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/hwmon/hwmon0/
+> device	    fan2_min	fan4_min    fan6_min	fan8_min   power1_input
+> fan1_fault  fan3_fault	fan5_fault  fan7_fault	in1_fault  subsystem
+> fan1_input  fan3_input	fan5_input  fan7_input	in2_fault  temp1_input
+> fan1_min    fan3_min	fan5_min    fan7_min	in3_fault  temp1_max
+> fan2_fault  fan4_fault	fan6_fault  fan8_fault	in4_fault  uevent
+> fan2_input  fan4_input	fan6_input  fan8_input	name
+> [root@tul163p1 ~]#
+> [root@tul163p1 ~]# ls /sys/class/hwmon/hwmon0/
+> device	    fan2_min	fan4_min    fan6_min	fan8_min   power1_input
+> fan1_fault  fan3_fault	fan5_fault  fan7_fault	in1_fault  subsystem
+> fan1_input  fan3_input	fan5_input  fan7_input	in2_fault  temp1_input
+> fan1_min    fan3_min	fan5_min    fan7_min	in3_fault  temp1_max
+> fan2_fault  fan4_fault	fan6_fault  fan8_fault	in4_fault  uevent
+> fan2_input  fan4_input	fan6_input  fan8_input	name
+> [root@tul163p1 ~]#
+>
+
+
+The inX_fault attributes don't really make much sense. _fault attributes without
+_input attributes don't have any value and are, as you noticed, not displayed
+with the sensors command. Is this a problem in teh devicetree data or do you
+really have voltage faults without voltages ?
+
+> Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
+> ---
+>
+Checkpatch says:
+
+total: 8 errors, 11 warnings, 389 lines checked
+
+NOTE: whitespace errors detected, you may wish to use scripts/cleanpatch or
+       scripts/cleanfile
+
+which should really not happen at this point.
+
+Please make sure you follow CodingStyle. checkpatch --strict points to a number
+of additional violations.
+
+More comments inline.
+
+> Changes in v2
+> =============
+> - Generic use of devm_* functions in hwmon like using devm_kzalloc() for dynamic
+>    memory request, avoiding the need to explicit free of memory.
+>    Adding 'struct attribute_group' as member of platform data structure to be
+>    populated and then passed to devm_hwmon_device_register_with_groups().
+>
+>    Note: Having an array of pointers of 'attribute_group' and each group
+>    corresponds to 'enum sensors' type. Not completely sure, if it's ideal or
+>    could have just one group populated with attributes of sensor types?
+>
+Your call, really; whatever is easier for you. I won't dictate one or the other.
+
+Question though is what happens if one group is not populated. If I understand
+the code correctly this will result in the remaining groups to be 'dropped',
+ie not displayed at all.
+
+> - 'ibmpowernv' is not hot-pluggable device so moving 'platform_driver' callback
+>    function (probe) as part of __init code.
+> - Fixed issues related to coding style.
+> - Other general comments in v1.
+>
+>   drivers/hwmon/Kconfig      |    8 +
+>   drivers/hwmon/Makefile     |    1
+>   drivers/hwmon/ibmpowernv.c |  368 ++++++++++++++++++++++++++++++++++++++++++++
+
+You'll also need Documentation/hwmon/ibmpowernv and
+Documentation/devicetree/bindings/hwmon/ibmpowernv.
+
+The latter will need to get an Ack from the devicetree maintainers.
+
+>   3 files changed, 377 insertions(+)
+>   create mode 100644 drivers/hwmon/ibmpowernv.c
+>
+> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
+> index bc196f4..3e308fa 100644
+> --- a/drivers/hwmon/Kconfig
+> +++ b/drivers/hwmon/Kconfig
+> @@ -554,6 +554,14 @@ config SENSORS_IBMPEX
+>   	  This driver can also be built as a module.  If so, the module
+>   	  will be called ibmpex.
+>
+> +config SENSORS_IBMPOWERNV
+> +	tristate "IBM POWERNV platform sensors"
+> +	depends on PPC_POWERNV
+> +	default y
+> +	help
+> +	  If you say yes here you get support for the temperature/fan/power
+> +	  sensors on your platform.
+> +
+>   config SENSORS_IIO_HWMON
+>   	tristate "Hwmon driver that uses channels specified via iio maps"
+>   	depends on IIO
+> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
+> index c48f987..199c401 100644
+> --- a/drivers/hwmon/Makefile
+> +++ b/drivers/hwmon/Makefile
+> @@ -71,6 +71,7 @@ obj-$(CONFIG_SENSORS_ULTRA45)	+= ultra45_env.o
+>   obj-$(CONFIG_SENSORS_I5K_AMB)	+= i5k_amb.o
+>   obj-$(CONFIG_SENSORS_IBMAEM)	+= ibmaem.o
+>   obj-$(CONFIG_SENSORS_IBMPEX)	+= ibmpex.o
+> +obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o
+>   obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o
+>   obj-$(CONFIG_SENSORS_INA209)	+= ina209.o
+>   obj-$(CONFIG_SENSORS_INA2XX)	+= ina2xx.o
+> diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c
+> new file mode 100644
+> index 0000000..afce620
+> --- /dev/null
+> +++ b/drivers/hwmon/ibmpowernv.c
+> @@ -0,0 +1,368 @@
+> +/*
+> + * IBM PowerNV platform sensors for temperature/fan/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.
+> + */
+> +
+> +#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 DRVNAME		"ibmpowernv"
+> +#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,
+> +	AMBIENT_TEMP,
+> +	POWER_SUPPLY,
+> +	POWER_INPUT,
+> +	MAX_SENSOR_TYPE,
+> +};
+> +
+> +static struct sensor_group {
+> +	const char *name;
+> +	const char *compatible;
+> +	struct attribute_group group;
+> +	u32 attr_count;
+> +} sensor_groups[] = {
+> +	{"fan", "ibm,opal-sensor-cooling-fan", {0}, 0},
+> +	{"temp", "ibm,opal-sensor-amb-temp", {0}, 0},
+> +	{"in", "ibm,opal-sensor-power-supply", {0}, 0},
+> +	{"power", "ibm,opal-sensor-power", {0}, 0}
+> +};
+> +
+The '0' initializations should not be necessary.
+
+
+> +struct sensor_data {
+> +	u32 id; /* An opaque id of the firmware for each sensor */
+> +	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 */
+> +};
+> +
+> +/* Platform device representing all the ibmpowernv sensors */
+> +static struct platform_device *pdevice;
+> +
+> +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) {
+> +		pr_err("%s: Failed to get opal sensor data\n", __func__);
+> +		return ret;
+> +	}
+> +
+> +	/* Convert temperature to milli-degrees */
+> +	if (sdata->type == AMBIENT_TEMP)
+> +		x *= 1000;
+> +	/* Convert power to micro-watts */
+> +	else if (sdata->type == POWER_INPUT)
+> +		x *= 1000000;
+> +
+> +	return sprintf(buf, "%d\n", x);
+
+x is unsigned, so %u.
+
+> +}
+> +
+> +static void __init get_sensor_index_attr(const char *name, u32 *index, char *attr)
+> +{
+> +	char *hash_pos = strchr(name, '#');
+> +	char *dash_pos;
+> +	u32 copy_len;
+> +	char buf[8];
+> +
+> +	memset(buf, 0, sizeof(buf));
+> +	*index = 0;
+> +	*attr = '\0';
+> +
+> +	if (hash_pos) {
+> +		dash_pos = strchr(hash_pos, '-');
+> +		if (dash_pos) {
+> +			copy_len = dash_pos - hash_pos - 1;
+> +			if (copy_len < sizeof(buf)) {
+> +				strncpy(buf, hash_pos + 1, copy_len);
+> +				sscanf(buf, "%d", index);
+
+What if sscanf fails ? Might be an interesting exercise to try and create
+multiple sensors with index 0 (or, for that matter, with the same index value).
+Do you have any protection against bad input data ? Guess not; did you test
+what happens if you pass bad data to the driver (such as duplicate sensor
+entries) ?
+
+> +			}
+> +
+> +			strncpy(attr, dash_pos + 1, MAX_ATTR_LEN);
+> +		}
+> +	}
+> +}
+> +
+> +/*
+> + * 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 int __init create_hwmon_attr_name(enum sensors type, const char *node_name,
+> +				  char *hwmon_attr_name)
+> +{
+> +	char attr_suffix[MAX_ATTR_LEN];
+> +	char *attr_name;
+> +	u32 index;
+> +
+> +	get_sensor_index_attr(node_name, &index, attr_suffix);
+> +	if (!index || !strlen(attr_suffix)) {
+> +		pr_info("%s: Sensor device node name is invalid, name: %s\n",
+> +				__func__, node_name);
+> +		return -EINVAL;
+> +	}
+> +
+> +	if (!strcmp(attr_suffix, DT_FAULT_ATTR_SUFFIX))
+> +		attr_name = "fault";
+> +	else if(!strcmp(attr_suffix, DT_DATA_ATTR_SUFFIX))
+> +		attr_name = "input";
+> +	else if (!strcmp(attr_suffix, DT_THRESHOLD_ATTR_SUFFIX)) {
+> +		if (type == AMBIENT_TEMP)
+> +			attr_name = "max";
+> +		else if (type == FAN)
+> +			attr_name = "min";
+> +		else
+> +			return -ENOENT;
+> +	} else
+> +		return -ENOENT;
+> +
+> +	snprintf(hwmon_attr_name, MAX_ATTR_LEN, "%s%d_%s",
+> +			sensor_groups[type].name, index, attr_name);
+> +	return 0;
+> +}
+> +
+> +static int __init 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;
+> +	int err = 0;
+> +
+> +	opal = of_find_node_by_path("/ibm,opal/sensors");
+> +        if (!opal) {
+
+An obvious whitespace error here.
+
+> +		pr_err("%s: Opal 'sensors' node not found\n", __func__);
+> +		return -ENODEV;
+> +        }
+> +
+> +	for_each_child_of_node(opal, np) {
+> +		if (np->name == NULL)
+> +			continue;
+> +
+> +		for (type = 0; type < MAX_SENSOR_TYPE; type++)
+> +			if (of_device_is_compatible(np,
+> +				sensor_groups[type].compatible)) {
+> +				sensor_groups[type].attr_count++;
+> +				break;
+> +			}
+> +	}
+
+You should be able to do
+	of_node_put(opal);
+
+here. Then you can return immediately on error below.
+
+> +
+> +	for (type = 0; type < MAX_SENSOR_TYPE; type++) {
+> +		if (!sensor_groups[type].attr_count)
+> +			continue;
+> +
+> +		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) {
+> +			pr_err("%s: Failed to allocate memory for attribute"
+> +					"array\n", __func__);
+
+devm_kzalloc() already dumps an error message. Same for all other memory error messages.
+
+> +			err = -ENOMEM;
+> +			goto exit_put_node;
+> +		}
+> +
+> +		pgroups[type] = &sensor_groups[type].group;
+> +		pdata->sensors_count += sensor_groups[type].attr_count;
+> +		sensor_groups[type].attr_count = 0;
+> +	}
+> +
+> +exit_put_node:
+> +	of_node_put(opal);
+> +	return err;
+> +}
+> +
+> +/*
+> + * Iterate through the device tree for each child of sensor 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 __init 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;
+> +	const u32 *sensor_id;
+> +	enum sensors type;
+> +	u32 count = 0;
+> +	int err = 0;
+> +
+> +	opal = of_find_node_by_path("/ibm,opal/sensors");
+> +        if (!opal) {
+> +		pr_err("%s: Opal 'sensors' node not found\n", __func__);
+> +		return -ENODEV;
+> +        }
+> +
+> +	sdata = devm_kzalloc(&pdev->dev, (pdata->sensors_count) *
+> +			     sizeof(*sdata), GFP_KERNEL);
+> +	if (!sdata) {
+> +		pr_err("%s: Failed to allocate memory for the sensor_data",
+> +				__func__);
+> +		err = -ENOMEM;
+> +		goto exit_put_node;
+> +	}
+> +
+> +	for_each_child_of_node(opal, np) {
+> +                if (np->name == NULL)
+> +                        continue;
+> +
+> +		for (type = 0; type < MAX_SENSOR_TYPE; type++)
+> +			if (of_device_is_compatible(np,
+> +					sensor_groups[type].compatible))
+> +				break;
+> +
+> +		if (type == MAX_SENSOR_TYPE)
+> +			continue;
+> +
+> +		sensor_id = of_get_property(np, "sensor-id", NULL);
+> +		if (!sensor_id) {
+> +			pr_info("%s: %s doesn't have sensor-id\n", __func__,
+> +				np->name);
+> +			continue;
+> +		}
+> +
+Consider using of_property_read_u32().
+
+> +		sdata[count].id = *sensor_id;
+> +		sdata[count].type = type;
+> +		err = create_hwmon_attr_name(type, np->name, sdata[count].name);
+> +		if (err)
+> +			goto exit_put_node;
+> +
+> +		sysfs_attr_init(&sdata[count].dev_attr.attr);
+> +		sdata[count].dev_attr.attr.name = sdata[count].name;
+> +		sdata[count].dev_attr.attr.mode = S_IRUGO;
+> +		sdata[count].dev_attr.show = 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 __init 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 file for each sensor found in the DT */
+
+Attribute data, not file
+
+> +	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 struct platform_driver ibmpowernv_driver = {
+> +	.driver = {
+> +		.owner = THIS_MODULE,
+> +		.name = DRVNAME,
+> +	},
+> +};
+> +
+> +static int __init ibmpowernv_init(void)
+> +{
+> +	int err;
+> +
+> +	pdevice = platform_device_alloc(DRVNAME, 0);
+> +	if (!pdevice) {
+> +		pr_err("%s: Device allocation failed\n", __func__);
+> +		err = -ENOMEM;
+> +		goto exit;
+> +	}
+> +
+> +	err = platform_device_add(pdevice);
+> +	if (err) {
+> +		pr_err("%s: Device addition failed (%d)\n", __func__, err);
+> +		goto exit_device_put;
+> +	}
+> +
+> +	err = platform_driver_probe(&ibmpowernv_driver, ibmpowernv_probe);
+> +	if (err) {
+> +		pr_err("%s: Platfrom driver probe failed\n", __func__);
+> +		goto exit_device_del;
+> +	}
+> +
+> +	return 0;
+> +
+> +exit_device_del:
+> +	platform_device_del(pdevice);
+> +exit_device_put:
+> +	platform_device_put(pdevice);
+> +exit:
+> +	return err;
+> +}
+> +
+> +static void __exit ibmpowernv_exit(void)
+> +{
+> +	platform_driver_unregister(&ibmpowernv_driver);
+> +	platform_device_unregister(pdevice);
+> +}
+> +
+> +MODULE_AUTHOR("Neelesh Gupta <neelegup@linux.vnet.ibm.com>");
+> +MODULE_DESCRIPTION("IBM POWERNV platform sensors");
+> +MODULE_LICENSE("GPL");
+> +
+> +module_init(ibmpowernv_init);
+> +module_exit(ibmpowernv_exit);
+>
+>
+>
diff --git a/a/content_digest b/N1/content_digest
index e06a41f..c95af50 100644
--- a/a/content_digest
+++ b/N1/content_digest
@@ -1,7 +1,7 @@
  "ref\020140519141931.9248.11356.stgit@neelegup-tp-t420.in.ibm.com\0"
  "From\0Guenter Roeck <linux@roeck-us.net>\0"
- "Subject\0Re: [lm-sensors] [PATCH v2] powerpc/powernv: hwmon driver for power values, fan rpm and temperature\0"
- "Date\0Wed, 28 May 2014 07:23:46 +0000\0"
+ "Subject\0Re: [PATCH v2] powerpc/powernv: hwmon driver for power values, fan rpm and temperature\0"
+ "Date\0Wed, 28 May 2014 00:23:46 -0700\0"
  "To\0Neelesh Gupta <neelegup@linux.vnet.ibm.com>"
   linuxppc-dev@lists.ozlabs.org
   jdelvare@suse.de
@@ -9,299 +9,543 @@
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- bG0tc2Vuc29ycy5vcmcvbWFpbG1hbi9saXN0aW5mby9sbS1zZW5zb3Jz
+ "On 05/19/2014 07:26 AM, Neelesh Gupta wrote:\n"
+ "> This patch adds basic kernel enablement for reading power values, fan\n"
+ "> speed rpm and temperature values on powernv platforms which will\n"
+ "> be exported to user space through sysfs interface.\n"
+ ">\n"
+ "> Test results:\n"
+ "> -------------\n"
+ "> [root@tul163p1 ~]# sensors\n"
+ "> ibmpowernv-isa-0000\n"
+ "> Adapter: ISA adapter\n"
+ "> fan1:        5487 RPM  (min =    0 RPM)\n"
+ "> fan2:        5152 RPM  (min =    0 RPM)\n"
+ "> fan3:        5590 RPM  (min =    0 RPM)\n"
+ "> fan4:        4963 RPM  (min =    0 RPM)\n"
+ "> fan5:           0 RPM  (min =    0 RPM)\n"
+ "> fan6:           0 RPM  (min =    0 RPM)\n"
+ "> fan7:        7488 RPM  (min =    0 RPM)\n"
+ "> fan8:        7944 RPM  (min =    0 RPM)\n"
+ "> temp1:        +39.0\302\260C  (high =  +0.0\302\260C)\n"
+ "> power1:      192.00 W\n"
+ ">\n"
+ "> [root@tul163p1 ~]# ls /sys/devices/platform/\n"
+ "> alarmtimer  ibmpowernv.0  rtc-generic  serial8250  uevent\n"
+ "> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/\n"
+ "> driver/    hwmon/     modalias   subsystem/ uevent\n"
+ "> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/hwmon/hwmon0/\n"
+ "> device\t    fan2_min\tfan4_min    fan6_min\tfan8_min   power1_input\n"
+ "> fan1_fault  fan3_fault\tfan5_fault  fan7_fault\tin1_fault  subsystem\n"
+ "> fan1_input  fan3_input\tfan5_input  fan7_input\tin2_fault  temp1_input\n"
+ "> fan1_min    fan3_min\tfan5_min    fan7_min\tin3_fault  temp1_max\n"
+ "> fan2_fault  fan4_fault\tfan6_fault  fan8_fault\tin4_fault  uevent\n"
+ "> fan2_input  fan4_input\tfan6_input  fan8_input\tname\n"
+ "> [root@tul163p1 ~]#\n"
+ "> [root@tul163p1 ~]# ls /sys/class/hwmon/hwmon0/\n"
+ "> device\t    fan2_min\tfan4_min    fan6_min\tfan8_min   power1_input\n"
+ "> fan1_fault  fan3_fault\tfan5_fault  fan7_fault\tin1_fault  subsystem\n"
+ "> fan1_input  fan3_input\tfan5_input  fan7_input\tin2_fault  temp1_input\n"
+ "> fan1_min    fan3_min\tfan5_min    fan7_min\tin3_fault  temp1_max\n"
+ "> fan2_fault  fan4_fault\tfan6_fault  fan8_fault\tin4_fault  uevent\n"
+ "> fan2_input  fan4_input\tfan6_input  fan8_input\tname\n"
+ "> [root@tul163p1 ~]#\n"
+ ">\n"
+ "\n"
+ "\n"
+ "The inX_fault attributes don't really make much sense. _fault attributes without\n"
+ "_input attributes don't have any value and are, as you noticed, not displayed\n"
+ "with the sensors command. Is this a problem in teh devicetree data or do you\n"
+ "really have voltage faults without voltages ?\n"
+ "\n"
+ "> Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>\n"
+ "> ---\n"
+ ">\n"
+ "Checkpatch says:\n"
+ "\n"
+ "total: 8 errors, 11 warnings, 389 lines checked\n"
+ "\n"
+ "NOTE: whitespace errors detected, you may wish to use scripts/cleanpatch or\n"
+ "       scripts/cleanfile\n"
+ "\n"
+ "which should really not happen at this point.\n"
+ "\n"
+ "Please make sure you follow CodingStyle. checkpatch --strict points to a number\n"
+ "of additional violations.\n"
+ "\n"
+ "More comments inline.\n"
+ "\n"
+ "> Changes in v2\n"
+ "> =============\n"
+ "> - Generic use of devm_* functions in hwmon like using devm_kzalloc() for dynamic\n"
+ ">    memory request, avoiding the need to explicit free of memory.\n"
+ ">    Adding 'struct attribute_group' as member of platform data structure to be\n"
+ ">    populated and then passed to devm_hwmon_device_register_with_groups().\n"
+ ">\n"
+ ">    Note: Having an array of pointers of 'attribute_group' and each group\n"
+ ">    corresponds to 'enum sensors' type. Not completely sure, if it's ideal or\n"
+ ">    could have just one group populated with attributes of sensor types?\n"
+ ">\n"
+ "Your call, really; whatever is easier for you. I won't dictate one or the other.\n"
+ "\n"
+ "Question though is what happens if one group is not populated. If I understand\n"
+ "the code correctly this will result in the remaining groups to be 'dropped',\n"
+ "ie not displayed at all.\n"
+ "\n"
+ "> - 'ibmpowernv' is not hot-pluggable device so moving 'platform_driver' callback\n"
+ ">    function (probe) as part of __init code.\n"
+ "> - Fixed issues related to coding style.\n"
+ "> - Other general comments in v1.\n"
+ ">\n"
+ ">   drivers/hwmon/Kconfig      |    8 +\n"
+ ">   drivers/hwmon/Makefile     |    1\n"
+ ">   drivers/hwmon/ibmpowernv.c |  368 ++++++++++++++++++++++++++++++++++++++++++++\n"
+ "\n"
+ "You'll also need Documentation/hwmon/ibmpowernv and\n"
+ "Documentation/devicetree/bindings/hwmon/ibmpowernv.\n"
+ "\n"
+ "The latter will need to get an Ack from the devicetree maintainers.\n"
+ "\n"
+ ">   3 files changed, 377 insertions(+)\n"
+ ">   create mode 100644 drivers/hwmon/ibmpowernv.c\n"
+ ">\n"
+ "> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig\n"
+ "> index bc196f4..3e308fa 100644\n"
+ "> --- a/drivers/hwmon/Kconfig\n"
+ "> +++ b/drivers/hwmon/Kconfig\n"
+ "> @@ -554,6 +554,14 @@ config SENSORS_IBMPEX\n"
+ ">   \t  This driver can also be built as a module.  If so, the module\n"
+ ">   \t  will be called ibmpex.\n"
+ ">\n"
+ "> +config SENSORS_IBMPOWERNV\n"
+ "> +\ttristate \"IBM POWERNV platform sensors\"\n"
+ "> +\tdepends on PPC_POWERNV\n"
+ "> +\tdefault y\n"
+ "> +\thelp\n"
+ "> +\t  If you say yes here you get support for the temperature/fan/power\n"
+ "> +\t  sensors on your platform.\n"
+ "> +\n"
+ ">   config SENSORS_IIO_HWMON\n"
+ ">   \ttristate \"Hwmon driver that uses channels specified via iio maps\"\n"
+ ">   \tdepends on IIO\n"
+ "> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile\n"
+ "> index c48f987..199c401 100644\n"
+ "> --- a/drivers/hwmon/Makefile\n"
+ "> +++ b/drivers/hwmon/Makefile\n"
+ "> @@ -71,6 +71,7 @@ obj-$(CONFIG_SENSORS_ULTRA45)\t+= ultra45_env.o\n"
+ ">   obj-$(CONFIG_SENSORS_I5K_AMB)\t+= i5k_amb.o\n"
+ ">   obj-$(CONFIG_SENSORS_IBMAEM)\t+= ibmaem.o\n"
+ ">   obj-$(CONFIG_SENSORS_IBMPEX)\t+= ibmpex.o\n"
+ "> +obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o\n"
+ ">   obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o\n"
+ ">   obj-$(CONFIG_SENSORS_INA209)\t+= ina209.o\n"
+ ">   obj-$(CONFIG_SENSORS_INA2XX)\t+= ina2xx.o\n"
+ "> diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c\n"
+ "> new file mode 100644\n"
+ "> index 0000000..afce620\n"
+ "> --- /dev/null\n"
+ "> +++ b/drivers/hwmon/ibmpowernv.c\n"
+ "> @@ -0,0 +1,368 @@\n"
+ "> +/*\n"
+ "> + * IBM PowerNV platform sensors for temperature/fan/power\n"
+ "> + * Copyright (C) 2014 IBM\n"
+ "> + *\n"
+ "> + * This program is free software; you can redistribute it and/or modify\n"
+ "> + * it under the terms of the GNU General Public License as published by\n"
+ "> + * the Free Software Foundation; either version 2 of the License, or\n"
+ "> + * (at your option) any later version.\n"
+ "> + *\n"
+ "> + * This program is distributed in the hope that it will be useful,\n"
+ "> + * but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+ "> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+ "> + * GNU General Public License for more details.\n"
+ "> + *\n"
+ "> + * You should have received a copy of the GNU General Public License\n"
+ "> + * along with this program.\n"
+ "> + */\n"
+ "> +\n"
+ "> +#include <linux/init.h>\n"
+ "> +#include <linux/module.h>\n"
+ "> +#include <linux/kernel.h>\n"
+ "> +#include <linux/hwmon.h>\n"
+ "> +#include <linux/hwmon-sysfs.h>\n"
+ "> +#include <linux/of.h>\n"
+ "> +#include <linux/slab.h>\n"
+ "> +\n"
+ "> +#include <linux/platform_device.h>\n"
+ "> +#include <asm/opal.h>\n"
+ "> +#include <linux/err.h>\n"
+ "> +\n"
+ "> +#define DRVNAME\t\t\"ibmpowernv\"\n"
+ "> +#define MAX_ATTR_LEN\t32\n"
+ "> +\n"
+ "> +/* Sensor suffix name from DT */\n"
+ "> +#define DT_FAULT_ATTR_SUFFIX\t\t\"faulted\"\n"
+ "> +#define DT_DATA_ATTR_SUFFIX\t\t\"data\"\n"
+ "> +#define DT_THRESHOLD_ATTR_SUFFIX\t\"thrs\"\n"
+ "> +\n"
+ "> +/*\n"
+ "> + * Enumerates all the types of sensors in the POWERNV platform and does index\n"
+ "> + * into 'struct sensor_group'\n"
+ "> + */\n"
+ "> +enum sensors {\n"
+ "> +\tFAN,\n"
+ "> +\tAMBIENT_TEMP,\n"
+ "> +\tPOWER_SUPPLY,\n"
+ "> +\tPOWER_INPUT,\n"
+ "> +\tMAX_SENSOR_TYPE,\n"
+ "> +};\n"
+ "> +\n"
+ "> +static struct sensor_group {\n"
+ "> +\tconst char *name;\n"
+ "> +\tconst char *compatible;\n"
+ "> +\tstruct attribute_group group;\n"
+ "> +\tu32 attr_count;\n"
+ "> +} sensor_groups[] = {\n"
+ "> +\t{\"fan\", \"ibm,opal-sensor-cooling-fan\", {0}, 0},\n"
+ "> +\t{\"temp\", \"ibm,opal-sensor-amb-temp\", {0}, 0},\n"
+ "> +\t{\"in\", \"ibm,opal-sensor-power-supply\", {0}, 0},\n"
+ "> +\t{\"power\", \"ibm,opal-sensor-power\", {0}, 0}\n"
+ "> +};\n"
+ "> +\n"
+ "The '0' initializations should not be necessary.\n"
+ "\n"
+ "\n"
+ "> +struct sensor_data {\n"
+ "> +\tu32 id; /* An opaque id of the firmware for each sensor */\n"
+ "> +\tenum sensors type;\n"
+ "> +\tchar name[MAX_ATTR_LEN];\n"
+ "> +\tstruct device_attribute dev_attr;\n"
+ "> +};\n"
+ "> +\n"
+ "> +struct platform_data {\n"
+ "> +\tconst struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1];\n"
+ "> +\tu32 sensors_count; /* Total count of sensors from each group */\n"
+ "> +};\n"
+ "> +\n"
+ "> +/* Platform device representing all the ibmpowernv sensors */\n"
+ "> +static struct platform_device *pdevice;\n"
+ "> +\n"
+ "> +static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr,\n"
+ "> +\t\t\t   char *buf)\n"
+ "> +{\n"
+ "> +\tstruct sensor_data *sdata = container_of(devattr, struct sensor_data,\n"
+ "> +\t\t\t\t\t\t dev_attr);\n"
+ "> +\tssize_t ret;\n"
+ "> +\tu32 x;\n"
+ "> +\n"
+ "> +\tret = opal_get_sensor_data(sdata->id, &x);\n"
+ "> +\tif (ret) {\n"
+ "> +\t\tpr_err(\"%s: Failed to get opal sensor data\\n\", __func__);\n"
+ "> +\t\treturn ret;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +\t/* Convert temperature to milli-degrees */\n"
+ "> +\tif (sdata->type == AMBIENT_TEMP)\n"
+ "> +\t\tx *= 1000;\n"
+ "> +\t/* Convert power to micro-watts */\n"
+ "> +\telse if (sdata->type == POWER_INPUT)\n"
+ "> +\t\tx *= 1000000;\n"
+ "> +\n"
+ "> +\treturn sprintf(buf, \"%d\\n\", x);\n"
+ "\n"
+ "x is unsigned, so %u.\n"
+ "\n"
+ "> +}\n"
+ "> +\n"
+ "> +static void __init get_sensor_index_attr(const char *name, u32 *index, char *attr)\n"
+ "> +{\n"
+ "> +\tchar *hash_pos = strchr(name, '#');\n"
+ "> +\tchar *dash_pos;\n"
+ "> +\tu32 copy_len;\n"
+ "> +\tchar buf[8];\n"
+ "> +\n"
+ "> +\tmemset(buf, 0, sizeof(buf));\n"
+ "> +\t*index = 0;\n"
+ "> +\t*attr = '\\0';\n"
+ "> +\n"
+ "> +\tif (hash_pos) {\n"
+ "> +\t\tdash_pos = strchr(hash_pos, '-');\n"
+ "> +\t\tif (dash_pos) {\n"
+ "> +\t\t\tcopy_len = dash_pos - hash_pos - 1;\n"
+ "> +\t\t\tif (copy_len < sizeof(buf)) {\n"
+ "> +\t\t\t\tstrncpy(buf, hash_pos + 1, copy_len);\n"
+ "> +\t\t\t\tsscanf(buf, \"%d\", index);\n"
+ "\n"
+ "What if sscanf fails ? Might be an interesting exercise to try and create\n"
+ "multiple sensors with index 0 (or, for that matter, with the same index value).\n"
+ "Do you have any protection against bad input data ? Guess not; did you test\n"
+ "what happens if you pass bad data to the driver (such as duplicate sensor\n"
+ "entries) ?\n"
+ "\n"
+ "> +\t\t\t}\n"
+ "> +\n"
+ "> +\t\t\tstrncpy(attr, dash_pos + 1, MAX_ATTR_LEN);\n"
+ "> +\t\t}\n"
+ "> +\t}\n"
+ "> +}\n"
+ "> +\n"
+ "> +/*\n"
+ "> + * This function translates the DT node name into the 'hwmon' attribute name.\n"
+ "> + * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc.\n"
+ "> + * which need to be mapped as fan2_input, temp1_max respectively before\n"
+ "> + * populating them inside hwmon device class..\n"
+ "> + */\n"
+ "> +static int __init create_hwmon_attr_name(enum sensors type, const char *node_name,\n"
+ "> +\t\t\t\t  char *hwmon_attr_name)\n"
+ "> +{\n"
+ "> +\tchar attr_suffix[MAX_ATTR_LEN];\n"
+ "> +\tchar *attr_name;\n"
+ "> +\tu32 index;\n"
+ "> +\n"
+ "> +\tget_sensor_index_attr(node_name, &index, attr_suffix);\n"
+ "> +\tif (!index || !strlen(attr_suffix)) {\n"
+ "> +\t\tpr_info(\"%s: Sensor device node name is invalid, name: %s\\n\",\n"
+ "> +\t\t\t\t__func__, node_name);\n"
+ "> +\t\treturn -EINVAL;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +\tif (!strcmp(attr_suffix, DT_FAULT_ATTR_SUFFIX))\n"
+ "> +\t\tattr_name = \"fault\";\n"
+ "> +\telse if(!strcmp(attr_suffix, DT_DATA_ATTR_SUFFIX))\n"
+ "> +\t\tattr_name = \"input\";\n"
+ "> +\telse if (!strcmp(attr_suffix, DT_THRESHOLD_ATTR_SUFFIX)) {\n"
+ "> +\t\tif (type == AMBIENT_TEMP)\n"
+ "> +\t\t\tattr_name = \"max\";\n"
+ "> +\t\telse if (type == FAN)\n"
+ "> +\t\t\tattr_name = \"min\";\n"
+ "> +\t\telse\n"
+ "> +\t\t\treturn -ENOENT;\n"
+ "> +\t} else\n"
+ "> +\t\treturn -ENOENT;\n"
+ "> +\n"
+ "> +\tsnprintf(hwmon_attr_name, MAX_ATTR_LEN, \"%s%d_%s\",\n"
+ "> +\t\t\tsensor_groups[type].name, index, attr_name);\n"
+ "> +\treturn 0;\n"
+ "> +}\n"
+ "> +\n"
+ "> +static int __init populate_attr_groups(struct platform_device *pdev)\n"
+ "> +{\n"
+ "> +\tstruct platform_data *pdata = platform_get_drvdata(pdev);\n"
+ "> +\tconst struct attribute_group **pgroups = pdata->attr_groups;\n"
+ "> +\tstruct device_node *opal, *np;\n"
+ "> +\tenum sensors type;\n"
+ "> +\tint err = 0;\n"
+ "> +\n"
+ "> +\topal = of_find_node_by_path(\"/ibm,opal/sensors\");\n"
+ "> +        if (!opal) {\n"
+ "\n"
+ "An obvious whitespace error here.\n"
+ "\n"
+ "> +\t\tpr_err(\"%s: Opal 'sensors' node not found\\n\", __func__);\n"
+ "> +\t\treturn -ENODEV;\n"
+ "> +        }\n"
+ "> +\n"
+ "> +\tfor_each_child_of_node(opal, np) {\n"
+ "> +\t\tif (np->name == NULL)\n"
+ "> +\t\t\tcontinue;\n"
+ "> +\n"
+ "> +\t\tfor (type = 0; type < MAX_SENSOR_TYPE; type++)\n"
+ "> +\t\t\tif (of_device_is_compatible(np,\n"
+ "> +\t\t\t\tsensor_groups[type].compatible)) {\n"
+ "> +\t\t\t\tsensor_groups[type].attr_count++;\n"
+ "> +\t\t\t\tbreak;\n"
+ "> +\t\t\t}\n"
+ "> +\t}\n"
+ "\n"
+ "You should be able to do\n"
+ "\tof_node_put(opal);\n"
+ "\n"
+ "here. Then you can return immediately on error below.\n"
+ "\n"
+ "> +\n"
+ "> +\tfor (type = 0; type < MAX_SENSOR_TYPE; type++) {\n"
+ "> +\t\tif (!sensor_groups[type].attr_count)\n"
+ "> +\t\t\tcontinue;\n"
+ "> +\n"
+ "> +\t\tsensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev,\n"
+ "> +\t\t\t\t\tsizeof(struct attribute*) *\n"
+ "> +\t\t\t\t\t(sensor_groups[type].attr_count + 1),\n"
+ "> +\t\t\t\t\tGFP_KERNEL);\n"
+ "> +\t\tif (!sensor_groups[type].group.attrs) {\n"
+ "> +\t\t\tpr_err(\"%s: Failed to allocate memory for attribute\"\n"
+ "> +\t\t\t\t\t\"array\\n\", __func__);\n"
+ "\n"
+ "devm_kzalloc() already dumps an error message. Same for all other memory error messages.\n"
+ "\n"
+ "> +\t\t\terr = -ENOMEM;\n"
+ "> +\t\t\tgoto exit_put_node;\n"
+ "> +\t\t}\n"
+ "> +\n"
+ "> +\t\tpgroups[type] = &sensor_groups[type].group;\n"
+ "> +\t\tpdata->sensors_count += sensor_groups[type].attr_count;\n"
+ "> +\t\tsensor_groups[type].attr_count = 0;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +exit_put_node:\n"
+ "> +\tof_node_put(opal);\n"
+ "> +\treturn err;\n"
+ "> +}\n"
+ "> +\n"
+ "> +/*\n"
+ "> + * Iterate through the device tree for each child of sensor node, create\n"
+ "> + * a sysfs attribute file, the file is named by translating the DT node name\n"
+ "> + * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max\n"
+ "> + * etc..\n"
+ "> + */\n"
+ "> +static int __init create_device_attrs(struct platform_device *pdev)\n"
+ "> +{\n"
+ "> +\tstruct platform_data *pdata = platform_get_drvdata(pdev);\n"
+ "> +\tconst struct attribute_group **pgroups = pdata->attr_groups;\n"
+ "> +\tstruct device_node *opal, *np;\n"
+ "> +\tstruct sensor_data *sdata;\n"
+ "> +\tconst u32 *sensor_id;\n"
+ "> +\tenum sensors type;\n"
+ "> +\tu32 count = 0;\n"
+ "> +\tint err = 0;\n"
+ "> +\n"
+ "> +\topal = of_find_node_by_path(\"/ibm,opal/sensors\");\n"
+ "> +        if (!opal) {\n"
+ "> +\t\tpr_err(\"%s: Opal 'sensors' node not found\\n\", __func__);\n"
+ "> +\t\treturn -ENODEV;\n"
+ "> +        }\n"
+ "> +\n"
+ "> +\tsdata = devm_kzalloc(&pdev->dev, (pdata->sensors_count) *\n"
+ "> +\t\t\t     sizeof(*sdata), GFP_KERNEL);\n"
+ "> +\tif (!sdata) {\n"
+ "> +\t\tpr_err(\"%s: Failed to allocate memory for the sensor_data\",\n"
+ "> +\t\t\t\t__func__);\n"
+ "> +\t\terr = -ENOMEM;\n"
+ "> +\t\tgoto exit_put_node;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +\tfor_each_child_of_node(opal, np) {\n"
+ "> +                if (np->name == NULL)\n"
+ "> +                        continue;\n"
+ "> +\n"
+ "> +\t\tfor (type = 0; type < MAX_SENSOR_TYPE; type++)\n"
+ "> +\t\t\tif (of_device_is_compatible(np,\n"
+ "> +\t\t\t\t\tsensor_groups[type].compatible))\n"
+ "> +\t\t\t\tbreak;\n"
+ "> +\n"
+ "> +\t\tif (type == MAX_SENSOR_TYPE)\n"
+ "> +\t\t\tcontinue;\n"
+ "> +\n"
+ "> +\t\tsensor_id = of_get_property(np, \"sensor-id\", NULL);\n"
+ "> +\t\tif (!sensor_id) {\n"
+ "> +\t\t\tpr_info(\"%s: %s doesn't have sensor-id\\n\", __func__,\n"
+ "> +\t\t\t\tnp->name);\n"
+ "> +\t\t\tcontinue;\n"
+ "> +\t\t}\n"
+ "> +\n"
+ "Consider using of_property_read_u32().\n"
+ "\n"
+ "> +\t\tsdata[count].id = *sensor_id;\n"
+ "> +\t\tsdata[count].type = type;\n"
+ "> +\t\terr = create_hwmon_attr_name(type, np->name, sdata[count].name);\n"
+ "> +\t\tif (err)\n"
+ "> +\t\t\tgoto exit_put_node;\n"
+ "> +\n"
+ "> +\t\tsysfs_attr_init(&sdata[count].dev_attr.attr);\n"
+ "> +\t\tsdata[count].dev_attr.attr.name = sdata[count].name;\n"
+ "> +\t\tsdata[count].dev_attr.attr.mode = S_IRUGO;\n"
+ "> +\t\tsdata[count].dev_attr.show = show_sensor;\n"
+ "> +\n"
+ "> +\t\tpgroups[type]->attrs[sensor_groups[type].attr_count++] =\n"
+ "> +\t\t\t\t&sdata[count++].dev_attr.attr;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +exit_put_node:\n"
+ "> +\tof_node_put(opal);\n"
+ "> +\treturn err;\n"
+ "> +}\n"
+ "> +\n"
+ "> +static int __init ibmpowernv_probe(struct platform_device *pdev)\n"
+ "> +{\n"
+ "> +\tstruct platform_data *pdata;\n"
+ "> +\tstruct device *hwmon_dev;\n"
+ "> +\tint err;\n"
+ "> +\n"
+ "> +\tpdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);\n"
+ "> +\tif (!pdata)\n"
+ "> +\t\treturn -ENOMEM;\n"
+ "> +\n"
+ "> +\tplatform_set_drvdata(pdev, pdata);\n"
+ "> +\tpdata->sensors_count = 0;\n"
+ "> +\terr = populate_attr_groups(pdev);\n"
+ "> +\tif (err)\n"
+ "> +\t\treturn err;\n"
+ "> +\n"
+ "> +\t/* Create sysfs attribute file for each sensor found in the DT */\n"
+ "\n"
+ "Attribute data, not file\n"
+ "\n"
+ "> +\terr = create_device_attrs(pdev);\n"
+ "> +\tif (err)\n"
+ "> +\t\treturn err;\n"
+ "> +\n"
+ "> +\t/* Finally, register with hwmon */\n"
+ "> +\thwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME,\n"
+ "> +\t\t\t\t\t\t\t   pdata,\n"
+ "> +\t\t\t\t\t\t\t   pdata->attr_groups);\n"
+ "> +\n"
+ "> +\treturn PTR_ERR_OR_ZERO(hwmon_dev);\n"
+ "> +}\n"
+ "> +\n"
+ "> +static struct platform_driver ibmpowernv_driver = {\n"
+ "> +\t.driver = {\n"
+ "> +\t\t.owner = THIS_MODULE,\n"
+ "> +\t\t.name = DRVNAME,\n"
+ "> +\t},\n"
+ "> +};\n"
+ "> +\n"
+ "> +static int __init ibmpowernv_init(void)\n"
+ "> +{\n"
+ "> +\tint err;\n"
+ "> +\n"
+ "> +\tpdevice = platform_device_alloc(DRVNAME, 0);\n"
+ "> +\tif (!pdevice) {\n"
+ "> +\t\tpr_err(\"%s: Device allocation failed\\n\", __func__);\n"
+ "> +\t\terr = -ENOMEM;\n"
+ "> +\t\tgoto exit;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +\terr = platform_device_add(pdevice);\n"
+ "> +\tif (err) {\n"
+ "> +\t\tpr_err(\"%s: Device addition failed (%d)\\n\", __func__, err);\n"
+ "> +\t\tgoto exit_device_put;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +\terr = platform_driver_probe(&ibmpowernv_driver, ibmpowernv_probe);\n"
+ "> +\tif (err) {\n"
+ "> +\t\tpr_err(\"%s: Platfrom driver probe failed\\n\", __func__);\n"
+ "> +\t\tgoto exit_device_del;\n"
+ "> +\t}\n"
+ "> +\n"
+ "> +\treturn 0;\n"
+ "> +\n"
+ "> +exit_device_del:\n"
+ "> +\tplatform_device_del(pdevice);\n"
+ "> +exit_device_put:\n"
+ "> +\tplatform_device_put(pdevice);\n"
+ "> +exit:\n"
+ "> +\treturn err;\n"
+ "> +}\n"
+ "> +\n"
+ "> +static void __exit ibmpowernv_exit(void)\n"
+ "> +{\n"
+ "> +\tplatform_driver_unregister(&ibmpowernv_driver);\n"
+ "> +\tplatform_device_unregister(pdevice);\n"
+ "> +}\n"
+ "> +\n"
+ "> +MODULE_AUTHOR(\"Neelesh Gupta <neelegup@linux.vnet.ibm.com>\");\n"
+ "> +MODULE_DESCRIPTION(\"IBM POWERNV platform sensors\");\n"
+ "> +MODULE_LICENSE(\"GPL\");\n"
+ "> +\n"
+ "> +module_init(ibmpowernv_init);\n"
+ "> +module_exit(ibmpowernv_exit);\n"
+ ">\n"
+ ">\n"
+ >
 
-9bcd225ba89e547737acdc185e170edda2f6f07cdca546b0fd001f1625d67dd3
+818dfb0e6963c14fb29565a0ae227308c95c0f5d46c7fa32a68c08dc99bd75fd

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