lkml.org 
[lkml]   [2017]   [Jul]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC] hwmon: (ibmpowernv) Add support for reset-history sensors
Date
In P9, OCC allows for clearing the sensor min-max history. This patch
exports attribute to reset history when set will clear the history of
all the sensors owned by CSM and belonging to the chip.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
---
This patch is on top of this patchset:
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1453891.html

This patch creates a non-standard attribute called as reset_historyX
which clears the lowest and highest of all the sensors like power,
temperature, voltage belonging to the chip.

drivers/hwmon/ibmpowernv.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)

diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c
index 5ccdd0b..611e472 100644
--- a/drivers/hwmon/ibmpowernv.c
+++ b/drivers/hwmon/ibmpowernv.c
@@ -51,6 +51,7 @@ enum sensors {
POWER_SUPPLY,
POWER_INPUT,
CURRENT,
+ RESET_HISTORY,
MAX_SENSOR_TYPE,
};

@@ -78,6 +79,7 @@ enum sensors {
{ "in" },
{ "power" },
{ "curr" },
+ { "reset_history" },
};

struct sensor_data {
@@ -126,6 +128,25 @@ static ssize_t show_label(struct device *dev, struct device_attribute *devattr,
return sprintf(buf, "%s\n", sdata->label);
}

+static ssize_t store_reset_history(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_data *sdata = container_of(devattr, struct sensor_data,
+ dev_attr);
+ int rc;
+ int reset;
+
+ rc = kstrtoint(buf, 0, &reset);
+ if (rc)
+ return rc;
+
+ if (reset == 1)
+ rc = opal_sensor_groups_clear_history(sdata->id);
+
+ return rc ? rc : count;
+}
+
static int __init get_logical_cpu(int hwcpu)
{
int cpu;
@@ -458,6 +479,16 @@ static int create_device_attrs(struct platform_device *pdev)

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

+ if (type == RESET_HISTORY) {
+ snprintf(sdata[count].name, MAX_ATTR_LEN, "%s%d",
+ sensor_groups[type].name,
+ sdata[count].hwmon_index);
+
+ sdata[count].dev_attr.attr.mode = 0220;
+ sdata[count].dev_attr.store = store_reset_history;
+ sdata[count].dev_attr.show = NULL;
+ }
+
pgroups[type]->attrs[sensor_groups[type].attr_count++] =
&sdata[count++].dev_attr.attr;

--
1.8.3.1
\
 
 \ /
  Last update: 2017-07-26 07:57    [W:0.057 / U:0.744 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site