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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) Meta Platforms, Inc. and affiliates. */
#include <linux/hwmon.h>
#include "fbnic.h"
#include "fbnic_mac.h"
static int fbnic_hwmon_sensor_id(enum hwmon_sensor_types type)
{
if (type == hwmon_temp)
return FBNIC_SENSOR_TEMP;
if (type == hwmon_in)
return FBNIC_SENSOR_VOLTAGE;
return -EOPNOTSUPP;
}
static umode_t fbnic_hwmon_is_visible(const void *drvdata,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
if (type == hwmon_temp && attr == hwmon_temp_input)
return 0444;
if (type == hwmon_in && attr == hwmon_in_input)
return 0444;
return 0;
}
static int fbnic_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct fbnic_dev *fbd = dev_get_drvdata(dev);
const struct fbnic_mac *mac = fbd->mac;
int id;
id = fbnic_hwmon_sensor_id(type);
return id < 0 ? id : mac->get_sensor(fbd, id, val);
}
static const struct hwmon_ops fbnic_hwmon_ops = {
.is_visible = fbnic_hwmon_is_visible,
.read = fbnic_hwmon_read,
};
static const struct hwmon_channel_info *fbnic_hwmon_info[] = {
HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
HWMON_CHANNEL_INFO(in, HWMON_I_INPUT),
NULL
};
static const struct hwmon_chip_info fbnic_chip_info = {
.ops = &fbnic_hwmon_ops,
.info = fbnic_hwmon_info,
};
void fbnic_hwmon_register(struct fbnic_dev *fbd)
{
if (!IS_REACHABLE(CONFIG_HWMON))
return;
fbd->hwmon = hwmon_device_register_with_info(fbd->dev, "fbnic",
fbd, &fbnic_chip_info,
NULL);
if (IS_ERR(fbd->hwmon)) {
dev_notice(fbd->dev,
"Failed to register hwmon device %pe\n",
fbd->hwmon);
fbd->hwmon = NULL;
}
}
void fbnic_hwmon_unregister(struct fbnic_dev *fbd)
{
if (!IS_REACHABLE(CONFIG_HWMON) || !fbd->hwmon)
return;
hwmon_device_unregister(fbd->hwmon);
fbd->hwmon = NULL;
}
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