373 lines
12 KiB
C
373 lines
12 KiB
C
/*
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* drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
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* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include "core.h"
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#define MLXSW_HWMON_TEMP_SENSOR_MAX_COUNT 127
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#define MLXSW_HWMON_ATTR_COUNT (MLXSW_HWMON_TEMP_SENSOR_MAX_COUNT * 4 + \
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MLXSW_MFCR_TACHOS_MAX + MLXSW_MFCR_PWMS_MAX)
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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[32];
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};
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struct mlxsw_hwmon {
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struct mlxsw_core *core;
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const struct mlxsw_bus_info *bus_info;
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struct device *hwmon_dev;
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struct attribute_group group;
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const struct attribute_group *groups[2];
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struct attribute *attrs[MLXSW_HWMON_ATTR_COUNT + 1];
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struct mlxsw_hwmon_attr hwmon_attrs[MLXSW_HWMON_ATTR_COUNT];
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unsigned int attrs_count;
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};
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static ssize_t mlxsw_hwmon_temp_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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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 int temp;
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int err;
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mlxsw_reg_mtmp_pack(mtmp_pl, mlwsw_hwmon_attr->type_index,
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false, false);
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err = mlxsw_reg_query(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 query temp sensor\n");
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return err;
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}
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mlxsw_reg_mtmp_unpack(mtmp_pl, &temp, NULL, NULL);
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return sprintf(buf, "%u\n", temp);
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}
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static ssize_t mlxsw_hwmon_temp_max_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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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 int temp_max;
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int err;
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mlxsw_reg_mtmp_pack(mtmp_pl, mlwsw_hwmon_attr->type_index,
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false, false);
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err = mlxsw_reg_query(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 query temp sensor\n");
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return err;
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}
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mlxsw_reg_mtmp_unpack(mtmp_pl, NULL, &temp_max, NULL);
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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 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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{
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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 mfsm_pl[MLXSW_REG_MFSM_LEN];
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int err;
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mlxsw_reg_mfsm_pack(mfsm_pl, mlwsw_hwmon_attr->type_index);
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err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfsm), mfsm_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query fan\n");
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return err;
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}
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return sprintf(buf, "%u\n", mlxsw_reg_mfsm_rpm_get(mfsm_pl));
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}
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static ssize_t mlxsw_hwmon_pwm_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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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 mfsc_pl[MLXSW_REG_MFSC_LEN];
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int err;
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mlxsw_reg_mfsc_pack(mfsc_pl, mlwsw_hwmon_attr->type_index, 0);
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err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfsc), mfsc_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query PWM\n");
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return err;
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}
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return sprintf(buf, "%u\n",
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mlxsw_reg_mfsc_pwm_duty_cycle_get(mfsc_pl));
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}
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static ssize_t mlxsw_hwmon_pwm_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 mfsc_pl[MLXSW_REG_MFSC_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 > 255)
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return -EINVAL;
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mlxsw_reg_mfsc_pack(mfsc_pl, mlwsw_hwmon_attr->type_index, val);
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err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mfsc), mfsc_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to write PWM\n");
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return err;
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}
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return len;
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}
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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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static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon *mlxsw_hwmon,
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enum mlxsw_hwmon_attr_type attr_type,
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unsigned int type_index, unsigned int num) {
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struct mlxsw_hwmon_attr *mlxsw_hwmon_attr;
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unsigned int attr_index;
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attr_index = mlxsw_hwmon->attrs_count;
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mlxsw_hwmon_attr = &mlxsw_hwmon->hwmon_attrs[attr_index];
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switch (attr_type) {
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case MLXSW_HWMON_ATTR_TYPE_TEMP:
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mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_show;
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mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
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snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
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"temp%u_input", num + 1);
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break;
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case MLXSW_HWMON_ATTR_TYPE_TEMP_MAX:
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mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_max_show;
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mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
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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 = 0200;
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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 = 0444;
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snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
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"fan%u_input", num + 1);
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break;
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case MLXSW_HWMON_ATTR_TYPE_PWM:
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mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_pwm_show;
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mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_pwm_store;
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mlxsw_hwmon_attr->dev_attr.attr.mode = 0644;
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snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
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"pwm%u", num + 1);
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break;
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default:
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WARN_ON(1);
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}
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mlxsw_hwmon_attr->type_index = type_index;
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mlxsw_hwmon_attr->hwmon = mlxsw_hwmon;
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mlxsw_hwmon_attr->dev_attr.attr.name = mlxsw_hwmon_attr->name;
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sysfs_attr_init(&mlxsw_hwmon_attr->dev_attr.attr);
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mlxsw_hwmon->attrs[attr_index] = &mlxsw_hwmon_attr->dev_attr.attr;
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mlxsw_hwmon->attrs_count++;
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}
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static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon *mlxsw_hwmon)
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{
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char mtcap_pl[MLXSW_REG_MTCAP_LEN] = {0};
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char mtmp_pl[MLXSW_REG_MTMP_LEN];
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u8 sensor_count;
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int i;
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int err;
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err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtcap), mtcap_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get number of temp sensors\n");
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return err;
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}
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sensor_count = mlxsw_reg_mtcap_sensor_count_get(mtcap_pl);
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for (i = 0; i < sensor_count; i++) {
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mlxsw_reg_mtmp_pack(mtmp_pl, i, true, true);
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err = mlxsw_reg_write(mlxsw_hwmon->core,
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MLXSW_REG(mtmp), mtmp_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n",
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i);
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return err;
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}
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mlxsw_hwmon_attr_add(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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static int mlxsw_hwmon_fans_init(struct mlxsw_hwmon *mlxsw_hwmon)
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{
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char mfcr_pl[MLXSW_REG_MFCR_LEN] = {0};
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enum mlxsw_reg_mfcr_pwm_frequency freq;
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unsigned int type_index;
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unsigned int num;
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u16 tacho_active;
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u8 pwm_active;
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int err;
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err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfcr), mfcr_pl);
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if (err) {
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dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get to probe PWMs and Tachometers\n");
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return err;
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}
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mlxsw_reg_mfcr_unpack(mfcr_pl, &freq, &tacho_active, &pwm_active);
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num = 0;
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for (type_index = 0; type_index < MLXSW_MFCR_TACHOS_MAX; type_index++) {
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if (tacho_active & BIT(type_index))
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mlxsw_hwmon_attr_add(mlxsw_hwmon,
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MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
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type_index, num++);
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}
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num = 0;
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for (type_index = 0; type_index < MLXSW_MFCR_PWMS_MAX; type_index++) {
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if (pwm_active & BIT(type_index))
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mlxsw_hwmon_attr_add(mlxsw_hwmon,
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MLXSW_HWMON_ATTR_TYPE_PWM,
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type_index, num++);
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}
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return 0;
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}
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int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
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const struct mlxsw_bus_info *mlxsw_bus_info,
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struct mlxsw_hwmon **p_hwmon)
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{
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struct mlxsw_hwmon *mlxsw_hwmon;
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struct device *hwmon_dev;
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int err;
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mlxsw_hwmon = devm_kzalloc(mlxsw_bus_info->dev, sizeof(*mlxsw_hwmon),
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GFP_KERNEL);
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if (!mlxsw_hwmon)
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return -ENOMEM;
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mlxsw_hwmon->core = mlxsw_core;
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mlxsw_hwmon->bus_info = mlxsw_bus_info;
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err = mlxsw_hwmon_temp_init(mlxsw_hwmon);
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if (err)
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goto err_temp_init;
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err = mlxsw_hwmon_fans_init(mlxsw_hwmon);
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if (err)
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goto err_fans_init;
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mlxsw_hwmon->groups[0] = &mlxsw_hwmon->group;
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mlxsw_hwmon->group.attrs = mlxsw_hwmon->attrs;
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hwmon_dev = devm_hwmon_device_register_with_groups(mlxsw_bus_info->dev,
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"mlxsw",
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mlxsw_hwmon,
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mlxsw_hwmon->groups);
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if (IS_ERR(hwmon_dev)) {
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err = PTR_ERR(hwmon_dev);
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goto err_hwmon_register;
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}
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mlxsw_hwmon->hwmon_dev = hwmon_dev;
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*p_hwmon = mlxsw_hwmon;
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return 0;
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err_hwmon_register:
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err_fans_init:
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err_temp_init:
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return err;
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}
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