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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>
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f2830d0989
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@ -49,7 +49,7 @@ struct mlxsw_hwmon_attr {
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struct device_attribute dev_attr;
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struct mlxsw_hwmon *hwmon;
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unsigned int type_index;
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char name[16];
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char name[32];
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};
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struct mlxsw_hwmon {
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@ -107,6 +107,32 @@ static ssize_t mlxsw_hwmon_temp_max_show(struct device *dev,
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return sprintf(buf, "%u\n", temp_max);
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}
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static ssize_t mlxsw_hwmon_temp_rst_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct mlxsw_hwmon_attr *mlwsw_hwmon_attr =
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container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
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struct mlxsw_hwmon *mlxsw_hwmon = mlwsw_hwmon_attr->hwmon;
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char mtmp_pl[MLXSW_REG_MTMP_LEN];
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unsigned long val;
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int err;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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if (val != 1)
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return -EINVAL;
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mlxsw_reg_mtmp_pack(mtmp_pl, mlwsw_hwmon_attr->type_index, true, true);
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err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to reset temp sensor history\n");
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return err;
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}
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return err ? err : len;
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}
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static ssize_t mlxsw_hwmon_fan_rpm_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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@ -175,6 +201,7 @@ static ssize_t mlxsw_hwmon_pwm_store(struct device *dev,
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enum mlxsw_hwmon_attr_type {
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MLXSW_HWMON_ATTR_TYPE_TEMP,
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MLXSW_HWMON_ATTR_TYPE_TEMP_MAX,
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MLXSW_HWMON_ATTR_TYPE_TEMP_RST,
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MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
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MLXSW_HWMON_ATTR_TYPE_PWM,
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};
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@ -201,6 +228,12 @@ static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon *mlxsw_hwmon,
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snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
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"temp%u_highest", num + 1);
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break;
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case MLXSW_HWMON_ATTR_TYPE_TEMP_RST:
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mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_temp_rst_store;
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mlxsw_hwmon_attr->dev_attr.attr.mode = S_IWUSR;
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snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
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"temp%u_reset_history", num + 1);
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break;
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case MLXSW_HWMON_ATTR_TYPE_FAN_RPM:
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mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_rpm_show;
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mlxsw_hwmon_attr->dev_attr.attr.mode = S_IRUGO;
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@ -254,6 +287,8 @@ static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon *mlxsw_hwmon)
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MLXSW_HWMON_ATTR_TYPE_TEMP, i, i);
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mlxsw_hwmon_attr_add(mlxsw_hwmon,
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MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, i, i);
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mlxsw_hwmon_attr_add(mlxsw_hwmon,
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MLXSW_HWMON_ATTR_TYPE_TEMP_RST, i, i);
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}
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return 0;
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}
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