drivers/misc/habanalabs/hwmon.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0

 /*
  * Copyright 2016-2019 HabanaLabs, Ltd.
  * All Rights Reserved.
  */

 #include "habanalabs.h"

 #include <linux/pci.h>
 #include <linux/hwmon.h>

 #define SENSORS_PKT_TIMEOUT		1000000	/* 1s */
 #define HWMON_NR_SENSOR_TYPES		(hwmon_pwm + 1)

 int hl_build_hwmon_channel_info(struct hl_device *hdev,
 				struct armcp_sensor *sensors_arr)
 {
 	u32 counts[HWMON_NR_SENSOR_TYPES] = {0};
 	u32 *sensors_by_type[HWMON_NR_SENSOR_TYPES] = {NULL};
 	u32 sensors_by_type_next_index[HWMON_NR_SENSOR_TYPES] = {0};
 	struct hwmon_channel_info **channels_info;
 	u32 num_sensors_for_type, num_active_sensor_types = 0,
 			arr_size = 0, *curr_arr;
 	enum hwmon_sensor_types type;
 	int rc, i, j;

 	for (i = 0 ; i < ARMCP_MAX_SENSORS ; i++) {
 		type = le32_to_cpu(sensors_arr[i].type);

 		if ((type == 0) && (sensors_arr[i].flags == 0))
 			break;

 		if (type >= HWMON_NR_SENSOR_TYPES) {
 			dev_err(hdev->dev,
 				"Got wrong sensor type %d from device\n", type);
 			return -EINVAL;
 		}

 		counts[type]++;
 		arr_size++;
 	}

 	for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
 		if (counts[i] == 0)
 			continue;

 		num_sensors_for_type = counts[i] + 1;
 		curr_arr = kcalloc(num_sensors_for_type, sizeof(*curr_arr),
 				GFP_KERNEL);
 		if (!curr_arr) {
 			rc = -ENOMEM;
 			goto sensors_type_err;
 		}

 		num_active_sensor_types++;
 		sensors_by_type[i] = curr_arr;
 	}

 	for (i = 0 ; i < arr_size ; i++) {
 		type = le32_to_cpu(sensors_arr[i].type);
 		curr_arr = sensors_by_type[type];
 		curr_arr[sensors_by_type_next_index[type]++] =
 				le32_to_cpu(sensors_arr[i].flags);
 	}

 	channels_info = kcalloc(num_active_sensor_types + 1,
 			sizeof(*channels_info), GFP_KERNEL);
 	if (!channels_info) {
 		rc = -ENOMEM;
 		goto channels_info_array_err;
 	}

 	for (i = 0 ; i < num_active_sensor_types ; i++) {
 		channels_info[i] = kzalloc(sizeof(*channels_info[i]),
 				GFP_KERNEL);
 		if (!channels_info[i]) {
 			rc = -ENOMEM;
 			goto channel_info_err;
 		}
 	}

 	for (i = 0, j = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
 		if (!sensors_by_type[i])
 			continue;

 		channels_info[j]->type = i;
 		channels_info[j]->config = sensors_by_type[i];
 		j++;
 	}

 	hdev->hl_chip_info->info =
 			(const struct hwmon_channel_info **)channels_info;

 	return 0;

 channel_info_err:
 	for (i = 0 ; i < num_active_sensor_types ; i++)
 		if (channels_info[i]) {
 			kfree(channels_info[i]->config);
 			kfree(channels_info[i]);
 		}
 	kfree(channels_info);
 channels_info_array_err:
 sensors_type_err:
 	for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++)
 		kfree(sensors_by_type[i]);

 	return rc;
 }

 static int hl_read(struct device *dev, enum hwmon_sensor_types type,
 			u32 attr, int channel, long *val)
 {
 	struct hl_device *hdev = dev_get_drvdata(dev);

 	if (hl_device_disabled_or_in_reset(hdev))
 		return -ENODEV;

 	switch (type) {
 	case hwmon_temp:
 		switch (attr) {
 		case hwmon_temp_input:
 		case hwmon_temp_max:
 		case hwmon_temp_crit:
 		case hwmon_temp_max_hyst:
 		case hwmon_temp_crit_hyst:
 			break;
 		default:
 			return -EINVAL;
 		}

 		*val = hl_get_temperature(hdev, channel, attr);
 		break;
 	case hwmon_in:
 		switch (attr) {
 		case hwmon_in_input:
 		case hwmon_in_min:
 		case hwmon_in_max:
 			break;
 		default:
 			return -EINVAL;
 		}

 		*val = hl_get_voltage(hdev, channel, attr);
 		break;
 	case hwmon_curr:
 		switch (attr) {
 		case hwmon_curr_input:
 		case hwmon_curr_min:
 		case hwmon_curr_max:
 			break;
 		default:
 			return -EINVAL;
 		}

 		*val = hl_get_current(hdev, channel, attr);
 		break;
 	case hwmon_fan:
 		switch (attr) {
 		case hwmon_fan_input:
 		case hwmon_fan_min:
 		case hwmon_fan_max:
 			break;
 		default:
 			return -EINVAL;
 		}
 		*val = hl_get_fan_speed(hdev, channel, attr);
 		break;
 	case hwmon_pwm:
 		switch (attr) {
 		case hwmon_pwm_input:
 		case hwmon_pwm_enable:
 			break;
 		default:
 			return -EINVAL;
 		}
 		*val = hl_get_pwm_info(hdev, channel, attr);
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static int hl_write(struct device *dev, enum hwmon_sensor_types type,
 			u32 attr, int channel, long val)
 {
 	struct hl_device *hdev = dev_get_drvdata(dev);

 	if (hl_device_disabled_or_in_reset(hdev))
 		return -ENODEV;

 	switch (type) {
 	case hwmon_pwm:
 		switch (attr) {
 		case hwmon_pwm_input:
 		case hwmon_pwm_enable:
 			break;
 		default:
 			return -EINVAL;
 		}
 		hl_set_pwm_info(hdev, channel, attr, val);
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type,
 				u32 attr, int channel)
 {
 	switch (type) {
 	case hwmon_temp:
 		switch (attr) {
 		case hwmon_temp_input:
 		case hwmon_temp_max:
 		case hwmon_temp_max_hyst:
 		case hwmon_temp_crit:
 		case hwmon_temp_crit_hyst:
 			return 0444;
 		}
 		break;
 	case hwmon_in:
 		switch (attr) {
 		case hwmon_in_input:
 		case hwmon_in_min:
 		case hwmon_in_max:
 			return 0444;
 		}
 		break;
 	case hwmon_curr:
 		switch (attr) {
 		case hwmon_curr_input:
 		case hwmon_curr_min:
 		case hwmon_curr_max:
 			return 0444;
 		}
 		break;
 	case hwmon_fan:
 		switch (attr) {
 		case hwmon_fan_input:
 		case hwmon_fan_min:
 		case hwmon_fan_max:
 			return 0444;
 		}
 		break;
 	case hwmon_pwm:
 		switch (attr) {
 		case hwmon_pwm_input:
 		case hwmon_pwm_enable:
 			return 0644;
 		}
 		break;
 	default:
 		break;
 	}
 	return 0;
 }

 static const struct hwmon_ops hl_hwmon_ops = {
 	.is_visible = hl_is_visible,
 	.read = hl_read,
 	.write = hl_write
 };

 long hl_get_temperature(struct hl_device *hdev, int sensor_index, u32 attr)
 {
 	struct armcp_packet pkt;
 	long result;
 	int rc;

 	memset(&pkt, 0, sizeof(pkt));

 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_TEMPERATURE_GET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
 	pkt.sensor_index = __cpu_to_le16(sensor_index);
 	pkt.type = __cpu_to_le16(attr);

 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 			SENSORS_PKT_TIMEOUT, &result);

 	if (rc) {
 		dev_err(hdev->dev,
 			"Failed to get temperature from sensor %d, error %d\n",
 			sensor_index, rc);
 		result = 0;
 	}

 	return result;
 }

 long hl_get_voltage(struct hl_device *hdev, int sensor_index, u32 attr)
 {
 	struct armcp_packet pkt;
 	long result;
 	int rc;

 	memset(&pkt, 0, sizeof(pkt));

 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_VOLTAGE_GET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
 	pkt.sensor_index = __cpu_to_le16(sensor_index);
 	pkt.type = __cpu_to_le16(attr);

 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 					SENSORS_PKT_TIMEOUT, &result);

 	if (rc) {
 		dev_err(hdev->dev,
 			"Failed to get voltage from sensor %d, error %d\n",
 			sensor_index, rc);
 		result = 0;
 	}

 	return result;
 }

 long hl_get_current(struct hl_device *hdev, int sensor_index, u32 attr)
 {
 	struct armcp_packet pkt;
 	long result;
 	int rc;

 	memset(&pkt, 0, sizeof(pkt));

 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_CURRENT_GET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
 	pkt.sensor_index = __cpu_to_le16(sensor_index);
 	pkt.type = __cpu_to_le16(attr);

 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 					SENSORS_PKT_TIMEOUT, &result);

 	if (rc) {
 		dev_err(hdev->dev,
 			"Failed to get current from sensor %d, error %d\n",
 			sensor_index, rc);
 		result = 0;
 	}

 	return result;
 }

 long hl_get_fan_speed(struct hl_device *hdev, int sensor_index, u32 attr)
 {
 	struct armcp_packet pkt;
 	long result;
 	int rc;

 	memset(&pkt, 0, sizeof(pkt));

 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_FAN_SPEED_GET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
 	pkt.sensor_index = __cpu_to_le16(sensor_index);
 	pkt.type = __cpu_to_le16(attr);

 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 					SENSORS_PKT_TIMEOUT, &result);

 	if (rc) {
 		dev_err(hdev->dev,
 			"Failed to get fan speed from sensor %d, error %d\n",
 			sensor_index, rc);
 		result = 0;
 	}

 	return result;
 }

 long hl_get_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr)
 {
 	struct armcp_packet pkt;
 	long result;
 	int rc;

 	memset(&pkt, 0, sizeof(pkt));

 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_GET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
 	pkt.sensor_index = __cpu_to_le16(sensor_index);
 	pkt.type = __cpu_to_le16(attr);

 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 					SENSORS_PKT_TIMEOUT, &result);

 	if (rc) {
 		dev_err(hdev->dev,
 			"Failed to get pwm info from sensor %d, error %d\n",
 			sensor_index, rc);
 		result = 0;
 	}

 	return result;
 }

 void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
 			long value)
 {
 	struct armcp_packet pkt;
 	int rc;

 	memset(&pkt, 0, sizeof(pkt));

 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_SET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
 	pkt.sensor_index = __cpu_to_le16(sensor_index);
 	pkt.type = __cpu_to_le16(attr);
 	pkt.value = cpu_to_le64(value);

 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 					SENSORS_PKT_TIMEOUT, NULL);

 	if (rc)
 		dev_err(hdev->dev,
 			"Failed to set pwm info to sensor %d, error %d\n",
 			sensor_index, rc);
 }

 int hl_hwmon_init(struct hl_device *hdev)
 {
 	struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev;
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	int rc;

 	if ((hdev->hwmon_initialized) || !(hdev->fw_loading))
 		return 0;

 	if (hdev->hl_chip_info->info) {
 		hdev->hl_chip_info->ops = &hl_hwmon_ops;

 		hdev->hwmon_dev = hwmon_device_register_with_info(dev,
 					prop->armcp_info.card_name, hdev,
 					hdev->hl_chip_info, NULL);
 		if (IS_ERR(hdev->hwmon_dev)) {
 			rc = PTR_ERR(hdev->hwmon_dev);
 			dev_err(hdev->dev,
 				"Unable to register hwmon device: %d\n", rc);
 			return rc;
 		}

 		dev_info(hdev->dev, "%s: add sensors information\n",
 			dev_name(hdev->hwmon_dev));

 		hdev->hwmon_initialized = true;
 	} else {
 		dev_info(hdev->dev, "no available sensors\n");
 	}

 	return 0;
 }

 void hl_hwmon_fini(struct hl_device *hdev)
 {
 	if (!hdev->hwmon_initialized)
 		return;

 	hwmon_device_unregister(hdev->hwmon_dev);
 }
	// SPDX-License-Identifier: GPL-2.0

	/*
	* Copyright 2016-2019 HabanaLabs, Ltd.
	* All Rights Reserved.
	*/

	#include "habanalabs.h"

	#include <linux/pci.h>
	#include <linux/hwmon.h>

	#define SENSORS_PKT_TIMEOUT 1000000 /* 1s */
	#define HWMON_NR_SENSOR_TYPES (hwmon_pwm + 1)

	int hl_build_hwmon_channel_info(struct hl_device *hdev,
	struct armcp_sensor *sensors_arr)
	{
	u32 counts[HWMON_NR_SENSOR_TYPES] = {0};
	u32 *sensors_by_type[HWMON_NR_SENSOR_TYPES] = {NULL};
	u32 sensors_by_type_next_index[HWMON_NR_SENSOR_TYPES] = {0};
	struct hwmon_channel_info **channels_info;
	u32 num_sensors_for_type, num_active_sensor_types = 0,
	arr_size = 0, *curr_arr;
	enum hwmon_sensor_types type;
	int rc, i, j;

	for (i = 0 ; i < ARMCP_MAX_SENSORS ; i++) {
	type = le32_to_cpu(sensors_arr[i].type);

	if ((type == 0) && (sensors_arr[i].flags == 0))
	break;

	if (type >= HWMON_NR_SENSOR_TYPES) {
	dev_err(hdev->dev,
	"Got wrong sensor type %d from device\n", type);
	return -EINVAL;
	}

	counts[type]++;
	arr_size++;
	}

	for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
	if (counts[i] == 0)
	continue;

	num_sensors_for_type = counts[i] + 1;
	curr_arr = kcalloc(num_sensors_for_type, sizeof(*curr_arr),
	GFP_KERNEL);
	if (!curr_arr) {
	rc = -ENOMEM;
	goto sensors_type_err;
	}

	num_active_sensor_types++;
	sensors_by_type[i] = curr_arr;
	}

	for (i = 0 ; i < arr_size ; i++) {
	type = le32_to_cpu(sensors_arr[i].type);
	curr_arr = sensors_by_type[type];
	curr_arr[sensors_by_type_next_index[type]++] =
	le32_to_cpu(sensors_arr[i].flags);
	}

	channels_info = kcalloc(num_active_sensor_types + 1,
	sizeof(*channels_info), GFP_KERNEL);
	if (!channels_info) {
	rc = -ENOMEM;
	goto channels_info_array_err;
	}

	for (i = 0 ; i < num_active_sensor_types ; i++) {
	channels_info[i] = kzalloc(sizeof(*channels_info[i]),
	GFP_KERNEL);
	if (!channels_info[i]) {
	rc = -ENOMEM;
	goto channel_info_err;
	}
	}

	for (i = 0, j = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
	if (!sensors_by_type[i])
	continue;

	channels_info[j]->type = i;
	channels_info[j]->config = sensors_by_type[i];
	j++;
	}

	hdev->hl_chip_info->info =
	(const struct hwmon_channel_info **)channels_info;

	return 0;

	channel_info_err:
	for (i = 0 ; i < num_active_sensor_types ; i++)
	if (channels_info[i]) {
	kfree(channels_info[i]->config);
	kfree(channels_info[i]);
	}
	kfree(channels_info);
	channels_info_array_err:
	sensors_type_err:
	for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++)
	kfree(sensors_by_type[i]);

	return rc;
	}

	static int hl_read(struct device *dev, enum hwmon_sensor_types type,
	u32 attr, int channel, long *val)
	{
	struct hl_device *hdev = dev_get_drvdata(dev);

	if (hl_device_disabled_or_in_reset(hdev))
	return -ENODEV;

	switch (type) {
	case hwmon_temp:
	switch (attr) {
	case hwmon_temp_input:
	case hwmon_temp_max:
	case hwmon_temp_crit:
	case hwmon_temp_max_hyst:
	case hwmon_temp_crit_hyst:
	break;
	default:
	return -EINVAL;
	}

	*val = hl_get_temperature(hdev, channel, attr);
	break;
	case hwmon_in:
	switch (attr) {
	case hwmon_in_input:
	case hwmon_in_min:
	case hwmon_in_max:
	break;
	default:
	return -EINVAL;
	}

	*val = hl_get_voltage(hdev, channel, attr);
	break;
	case hwmon_curr:
	switch (attr) {
	case hwmon_curr_input:
	case hwmon_curr_min:
	case hwmon_curr_max:
	break;
	default:
	return -EINVAL;
	}

	*val = hl_get_current(hdev, channel, attr);
	break;
	case hwmon_fan:
	switch (attr) {
	case hwmon_fan_input:
	case hwmon_fan_min:
	case hwmon_fan_max:
	break;
	default:
	return -EINVAL;
	}
	*val = hl_get_fan_speed(hdev, channel, attr);
	break;
	case hwmon_pwm:
	switch (attr) {
	case hwmon_pwm_input:
	case hwmon_pwm_enable:
	break;
	default:
	return -EINVAL;
	}
	*val = hl_get_pwm_info(hdev, channel, attr);
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	static int hl_write(struct device *dev, enum hwmon_sensor_types type,
	u32 attr, int channel, long val)
	{
	struct hl_device *hdev = dev_get_drvdata(dev);

	if (hl_device_disabled_or_in_reset(hdev))
	return -ENODEV;

	switch (type) {
	case hwmon_pwm:
	switch (attr) {
	case hwmon_pwm_input:
	case hwmon_pwm_enable:
	break;
	default:
	return -EINVAL;
	}
	hl_set_pwm_info(hdev, channel, attr, val);
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type,
	u32 attr, int channel)
	{
	switch (type) {
	case hwmon_temp:
	switch (attr) {
	case hwmon_temp_input:
	case hwmon_temp_max:
	case hwmon_temp_max_hyst:
	case hwmon_temp_crit:
	case hwmon_temp_crit_hyst:
	return 0444;
	}
	break;
	case hwmon_in:
	switch (attr) {
	case hwmon_in_input:
	case hwmon_in_min:
	case hwmon_in_max:
	return 0444;
	}
	break;
	case hwmon_curr:
	switch (attr) {
	case hwmon_curr_input:
	case hwmon_curr_min:
	case hwmon_curr_max:
	return 0444;
	}
	break;
	case hwmon_fan:
	switch (attr) {
	case hwmon_fan_input:
	case hwmon_fan_min:
	case hwmon_fan_max:
	return 0444;
	}
	break;
	case hwmon_pwm:
	switch (attr) {
	case hwmon_pwm_input:
	case hwmon_pwm_enable:
	return 0644;
	}
	break;
	default:
	break;
	}
	return 0;
	}

	static const struct hwmon_ops hl_hwmon_ops = {
	.is_visible = hl_is_visible,
	.read = hl_read,
	.write = hl_write
	};

	long hl_get_temperature(struct hl_device *hdev, int sensor_index, u32 attr)
	{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_TEMPERATURE_GET <<
	ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
	SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
	dev_err(hdev->dev,
	"Failed to get temperature from sensor %d, error %d\n",
	sensor_index, rc);
	result = 0;
	}

	return result;
	}

	long hl_get_voltage(struct hl_device *hdev, int sensor_index, u32 attr)
	{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_VOLTAGE_GET <<
	ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
	SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
	dev_err(hdev->dev,
	"Failed to get voltage from sensor %d, error %d\n",
	sensor_index, rc);
	result = 0;
	}

	return result;
	}

	long hl_get_current(struct hl_device *hdev, int sensor_index, u32 attr)
	{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_CURRENT_GET <<
	ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
	SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
	dev_err(hdev->dev,
	"Failed to get current from sensor %d, error %d\n",
	sensor_index, rc);
	result = 0;
	}

	return result;
	}

	long hl_get_fan_speed(struct hl_device *hdev, int sensor_index, u32 attr)
	{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_FAN_SPEED_GET <<
	ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
	SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
	dev_err(hdev->dev,
	"Failed to get fan speed from sensor %d, error %d\n",
	sensor_index, rc);
	result = 0;
	}

	return result;
	}

	long hl_get_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr)
	{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_GET <<
	ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
	SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
	dev_err(hdev->dev,
	"Failed to get pwm info from sensor %d, error %d\n",
	sensor_index, rc);
	result = 0;
	}

	return result;
	}

	void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
	long value)
	{
	struct armcp_packet pkt;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_SET <<
	ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);
	pkt.value = cpu_to_le64(value);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
	SENSORS_PKT_TIMEOUT, NULL);

	if (rc)
	dev_err(hdev->dev,
	"Failed to set pwm info to sensor %d, error %d\n",
	sensor_index, rc);
	}

	int hl_hwmon_init(struct hl_device *hdev)
	{
	struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev;
	struct asic_fixed_properties *prop = &hdev->asic_prop;
	int rc;

	if ((hdev->hwmon_initialized) \|\| !(hdev->fw_loading))
	return 0;

	if (hdev->hl_chip_info->info) {
	hdev->hl_chip_info->ops = &hl_hwmon_ops;

	hdev->hwmon_dev = hwmon_device_register_with_info(dev,
	prop->armcp_info.card_name, hdev,
	hdev->hl_chip_info, NULL);
	if (IS_ERR(hdev->hwmon_dev)) {
	rc = PTR_ERR(hdev->hwmon_dev);
	dev_err(hdev->dev,
	"Unable to register hwmon device: %d\n", rc);
	return rc;
	}

	dev_info(hdev->dev, "%s: add sensors information\n",
	dev_name(hdev->hwmon_dev));

	hdev->hwmon_initialized = true;
	} else {
	dev_info(hdev->dev, "no available sensors\n");
	}

	return 0;
	}

	void hl_hwmon_fini(struct hl_device *hdev)
	{
	if (!hdev->hwmon_initialized)
	return;

	hwmon_device_unregister(hdev->hwmon_dev);
	}