max6639.h

Go to the documentation of this file.

/*
 * Copyright (c) 2025 Tenstorrent AI ULC
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_MFD_MAX6639_H_
#define ZEPHYR_INCLUDE_DRIVERS_MFD_MAX6639_H_
 
#include <zephyr/drivers/sensor.h>
#include <zephyr/sys/util.h>
#include <zephyr/sys/util_macro.h>
 
#define MAX6639_PWM_PERIOD 120
#define MAX6639_RPM_RANGE  16000
 
#define MAX6639_REG_GLOBAL_CONFIG_PWM_FREQUENCY_SHIFT 3
#define MAX6639_CONFIG_3_PWM_FREQUENCY_MASK           3
#define MAX6639_EXTENDED_TEMP_SHIFT                   5
 
#define MAX6639_LOW_FREQ_00_FREQ 20
#define MAX6639_LOW_FREQ_01_FREQ 33
#define MAX6639_LOW_FREQ_10_FREQ 50
#define MAX6639_LOW_FREQ_11_FREQ 100
 
#define MAX6639_HIGH_FREQ_00_FREQ 5000
#define MAX6639_HIGH_FREQ_01_FREQ 8330
#define MAX6639_HIGH_FREQ_10_FREQ 12500
#define MAX6639_HIGH_FREQ_11_FREQ 25000
 
#define MAX6639_HIGH_LOW_FREQ_RATIO 250
 
/* Registers */
#define MAX6639_REG_CHANNEL_1_TEMP 0x00
#define MAX6639_REG_CHANNEL_2_TEMP 0x01
 
#define MAX6639_REG_GLOBAL_CONFIG 0x04
 
#define MAX6639_REG_CHANNEL_1_TEMP_EXTENDED 0x05
#define MAX6639_REG_CHANNEL_2_TEMP_EXTENDED 0x06
 
#define MAX6639_REG_CHANNEL_1_CONFIG_1  0x10
#define MAX6639_REG_CHANNEL_1_CONFIG_2A 0x11
#define MAX6639_REG_CHANNEL_1_CONFIG_3  0x13
#define MAX6639_REG_CHANNEL_2_CONFIG_1  0x14
#define MAX6639_REG_CHANNEL_2_CONFIG_2A 0x15
#define MAX6639_REG_CHANNEL_2_CONFIG_3  0x17
 
#define MAX6639_REG_CHANNEL_1_TACH 0x20
#define MAX6639_REG_CHANNEL_2_TACH 0x21
 
#define MAX6639_REG_CHANNEL_1_DUTY_CYCLE 0x26
#define MAX6639_REG_CHANNEL_2_DUTY_CYCLE 0x27
 
enum max6639_sensor_channel {
        MAX6639_CHAN_1_RPM = SENSOR_CHAN_PRIV_START,
        MAX6639_CHAN_1_DUTY_CYCLE,
        MAX6639_CHAN_1_TEMP,
        MAX6639_CHAN_2_RPM,
        MAX6639_CHAN_2_DUTY_CYCLE,
        MAX6639_CHAN_2_TEMP,
};
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_MFD_MAX6639_H_ */