summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJiri Pirko <jiri@mellanox.com>2015-12-21 11:14:21 +0100
committerDavid S. Miller <davem@davemloft.net>2015-12-22 16:00:04 -0500
commite7bc73cbb522c1704aafc428d5d9763c44666e38 (patch)
tree53296c7da01f5fd1b5ee5904e060f0fab12680e2
parentf2830d09895a64ba7a1a2c6ef41106c72e3654b2 (diff)
mlxsw: core: Allow to reset temperature history via hwmon interface
Add another sysfs hwmon attribute to expose possibility to reset temperature sensors history. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c37
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
index b86db967eab9..00ccf1c0dcda 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
@@ -49,7 +49,7 @@ struct mlxsw_hwmon_attr {
struct device_attribute dev_attr;
struct mlxsw_hwmon *hwmon;
unsigned int type_index;
- char name[16];
+ char name[32];
};
struct mlxsw_hwmon {
@@ -107,6 +107,32 @@ static ssize_t mlxsw_hwmon_temp_max_show(struct device *dev,
return sprintf(buf, "%u\n", temp_max);
}
+static ssize_t mlxsw_hwmon_temp_rst_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct mlxsw_hwmon_attr *mlwsw_hwmon_attr =
+ container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
+ struct mlxsw_hwmon *mlxsw_hwmon = mlwsw_hwmon_attr->hwmon;
+ char mtmp_pl[MLXSW_REG_MTMP_LEN];
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ if (val != 1)
+ return -EINVAL;
+
+ mlxsw_reg_mtmp_pack(mtmp_pl, mlwsw_hwmon_attr->type_index, true, true);
+ err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
+ if (err) {
+ dev_err(mlxsw_hwmon->bus_info->dev, "Failed to reset temp sensor history\n");
+ return err;
+ }
+ return err ? err : len;
+}
+
static ssize_t mlxsw_hwmon_fan_rpm_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -175,6 +201,7 @@ static ssize_t mlxsw_hwmon_pwm_store(struct device *dev,
enum mlxsw_hwmon_attr_type {
MLXSW_HWMON_ATTR_TYPE_TEMP,
MLXSW_HWMON_ATTR_TYPE_TEMP_MAX,
+ MLXSW_HWMON_ATTR_TYPE_TEMP_RST,
MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
MLXSW_HWMON_ATTR_TYPE_PWM,
};
@@ -201,6 +228,12 @@ static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon *mlxsw_hwmon,
snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
"temp%u_highest", num + 1);
break;
+ case MLXSW_HWMON_ATTR_TYPE_TEMP_RST:
+ mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_temp_rst_store;
+ mlxsw_hwmon_attr->dev_attr.attr.mode = S_IWUSR;
+ snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
+ "temp%u_reset_history", num + 1);
+ break;
case MLXSW_HWMON_ATTR_TYPE_FAN_RPM:
mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_rpm_show;
mlxsw_hwmon_attr->dev_attr.attr.mode = S_IRUGO;
@@ -254,6 +287,8 @@ static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon *mlxsw_hwmon)
MLXSW_HWMON_ATTR_TYPE_TEMP, i, i);
mlxsw_hwmon_attr_add(mlxsw_hwmon,
MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, i, i);
+ mlxsw_hwmon_attr_add(mlxsw_hwmon,
+ MLXSW_HWMON_ATTR_TYPE_TEMP_RST, i, i);
}
return 0;
}