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mlxsw: core: Allow to reset temperature history via hwmon interface

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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>
This commit is contained in:
Jiri Pirko 2015-12-21 11:14:21 +01:00 committed by David S. Miller
parent f2830d0989
commit e7bc73cbb5
1 changed files with 36 additions and 1 deletions
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37
drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
View file

@ -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;
}