mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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8806307341
This patch adds support for hardware monitoring to the fbnic driver, allowing for temperature and voltage sensor data to be exposed to userspace via the HWMON interface. The driver registers a HWMON device and provides callbacks for reading sensor data, enabling system admins to monitor the health and operating conditions of fbnic. Signed-off-by: Sanman Pradhan <sanman.p211993@gmail.com> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com> Link: https://patch.msgid.link/20250114000705.2081288-4-sanman.p211993@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) Meta Platforms, Inc. and affiliates. */
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#include <linux/hwmon.h>
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#include "fbnic.h"
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#include "fbnic_mac.h"
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static int fbnic_hwmon_sensor_id(enum hwmon_sensor_types type)
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{
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if (type == hwmon_temp)
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return FBNIC_SENSOR_TEMP;
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if (type == hwmon_in)
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return FBNIC_SENSOR_VOLTAGE;
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return -EOPNOTSUPP;
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}
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static umode_t fbnic_hwmon_is_visible(const void *drvdata,
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enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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if (type == hwmon_temp && attr == hwmon_temp_input)
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return 0444;
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if (type == hwmon_in && attr == hwmon_in_input)
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return 0444;
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return 0;
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}
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static int fbnic_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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struct fbnic_dev *fbd = dev_get_drvdata(dev);
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const struct fbnic_mac *mac = fbd->mac;
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int id;
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id = fbnic_hwmon_sensor_id(type);
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return id < 0 ? id : mac->get_sensor(fbd, id, val);
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}
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static const struct hwmon_ops fbnic_hwmon_ops = {
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.is_visible = fbnic_hwmon_is_visible,
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.read = fbnic_hwmon_read,
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};
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static const struct hwmon_channel_info *fbnic_hwmon_info[] = {
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HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
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HWMON_CHANNEL_INFO(in, HWMON_I_INPUT),
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NULL
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};
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static const struct hwmon_chip_info fbnic_chip_info = {
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.ops = &fbnic_hwmon_ops,
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.info = fbnic_hwmon_info,
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};
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void fbnic_hwmon_register(struct fbnic_dev *fbd)
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{
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if (!IS_REACHABLE(CONFIG_HWMON))
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return;
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fbd->hwmon = hwmon_device_register_with_info(fbd->dev, "fbnic",
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fbd, &fbnic_chip_info,
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NULL);
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if (IS_ERR(fbd->hwmon)) {
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dev_notice(fbd->dev,
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"Failed to register hwmon device %pe\n",
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fbd->hwmon);
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fbd->hwmon = NULL;
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}
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}
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void fbnic_hwmon_unregister(struct fbnic_dev *fbd)
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{
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if (!IS_REACHABLE(CONFIG_HWMON) || !fbd->hwmon)
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return;
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hwmon_device_unregister(fbd->hwmon);
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fbd->hwmon = NULL;
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}
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