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hwmon: (ibmpowernv) Add highest/lowest attributes to sensors 

OCC provides historical minimum and maximum value for the sensor
readings. This patch exports them as highest and lowest attributes
for the inband sensors copied by OCC to main memory.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Shilpasri G Bhat 2017-05-29 10:16:01 +05:30 committed by Guenter Roeck
parent 4ba1bb12cf
commit 996cf5a5e9
1 changed files with 61 additions and 7 deletions
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68
drivers/hwmon/ibmpowernv.c
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@ -298,10 +298,14 @@ static int populate_attr_groups(struct platform_device *pdev)
sensor_groups[type].attr_count++;
/*
* add a new attribute for labels
* add attributes for labels, min and max
*/
if (!of_property_read_string(np, "label", &label))
sensor_groups[type].attr_count++;
if (of_find_property(np, "sensor-data-min", NULL))
sensor_groups[type].attr_count++;
if (of_find_property(np, "sensor-data-max", NULL))
sensor_groups[type].attr_count++;
}
of_node_put(opal);
@ -337,6 +341,41 @@ static void create_hwmon_attr(struct sensor_data *sdata, const char *attr_name,
sdata->dev_attr.show = show;
}
static void populate_sensor(struct sensor_data *sdata, int od, int hd, int sid,
const char *attr_name, enum sensors type,
const struct attribute_group *pgroup,
ssize_t (*show)(struct device *dev,
struct device_attribute *attr,
char *buf))
{
sdata->id = sid;
sdata->type = type;
sdata->opal_index = od;
sdata->hwmon_index = hd;
create_hwmon_attr(sdata, attr_name, show);
pgroup->attrs[sensor_groups[type].attr_count++] = &sdata->dev_attr.attr;
}
static char *get_max_attr(enum sensors type)
{
switch (type) {
case POWER_INPUT:
return "input_highest";
default:
return "highest";
}
}
static char *get_min_attr(enum sensors type)
{
switch (type) {
case POWER_INPUT:
return "input_lowest";
default:
return "lowest";
}
}
/*
* 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
@ -417,16 +456,31 @@ static int create_device_attrs(struct platform_device *pdev)
* attribute. They are related to the same
* sensor.
*/
sdata[count].type = type;
sdata[count].opal_index = sdata[count - 1].opal_index;
sdata[count].hwmon_index = sdata[count - 1].hwmon_index;
make_sensor_label(np, &sdata[count], label);
populate_sensor(&sdata[count], opal_index,
sdata[count - 1].hwmon_index,
sensor_id, "label", type, pgroups[type],
show_label);
count++;
}
create_hwmon_attr(&sdata[count], "label", show_label);
if (!of_property_read_u32(np, "sensor-data-max", &sensor_id)) {
attr_name = get_max_attr(type);
populate_sensor(&sdata[count], opal_index,
sdata[count - 1].hwmon_index,
sensor_id, attr_name, type,
pgroups[type], show_sensor);
count++;
}
pgroups[type]->attrs[sensor_groups[type].attr_count++] =
&sdata[count++].dev_attr.attr;
if (!of_property_read_u32(np, "sensor-data-min", &sensor_id)) {
attr_name = get_min_attr(type);
populate_sensor(&sdata[count], opal_index,
sdata[count - 1].hwmon_index,
sensor_id, attr_name, type,
pgroups[type], show_sensor);
count++;
}
}