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drivers: allow changing max31865 three-wire mode at runtime 

Instead of only through static devicetree config at boot.

Signed-off-by: Armin Brauns <armin.brauns@embedded-solutions.at>
This commit is contained in:
Armin Brauns 2023-11-14 14:12:36 +00:00 committed by Anas Nashif
parent 490c5e3b20
commit 2b2e6bad36
3 changed files with 39 additions and 1 deletions
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27
drivers/sensor/max31865/max31865.c
View File

@ -139,6 +139,14 @@ static int max31865_set_vbias(const struct device *dev, bool enable)
return configure_device(dev);
}
static int max31865_set_three_wire(const struct device *dev, bool enable)
{
struct max31865_data *data = dev->data;
WRITE_BIT(data->config_control_bits, 4, enable);
return configure_device(dev);
}
static char *max31865_error_to_string(uint8_t fault_register)
{
switch (fault_register) {
@ -242,13 +250,13 @@ static int max31865_init(const struct device *dev)
WRITE_BIT(data->config_control_bits, 6, config->conversion_mode);
WRITE_BIT(data->config_control_bits, 5, config->one_shot);
WRITE_BIT(data->config_control_bits, 4, config->three_wire);
data->config_control_bits |= config->fault_cycle & 0b00001100;
WRITE_BIT(data->config_control_bits, 0, config->filter_50hz);
configure_device(dev);
set_threshold_values(dev);
max31865_set_vbias(dev, false);
max31865_set_three_wire(dev, config->three_wire);
return 0;
}
@ -274,9 +282,26 @@ static int max31865_channel_get(const struct device *dev, enum sensor_channel ch
}
}
static int max31865_attr_set(const struct device *dev, enum sensor_channel chan,
enum sensor_attribute attr, const struct sensor_value *val)
{
if (chan != SENSOR_CHAN_ALL && chan != SENSOR_CHAN_AMBIENT_TEMP) {
LOG_ERR("Invalid channel provided");
return -ENOTSUP;
}
switch (attr) {
case SENSOR_ATTR_MAX31865_THREE_WIRE:
return max31865_set_three_wire(dev, val->val1);
default:
return -ENOTSUP;
}
}
static const struct sensor_driver_api max31865_api_funcs = {
.sample_fetch = max31865_sample_fetch,
.channel_get = max31865_channel_get,
.attr_set = max31865_attr_set,
};
#define MAX31865_DEFINE(inst) \

1
drivers/sensor/max31865/max31865.h
View File

@ -11,6 +11,7 @@
#include <math.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/drivers/sensor/max31865.h>
#include <zephyr/drivers/spi.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>

12
include/zephyr/drivers/sensor/max31865.h Normal file
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@ -0,0 +1,12 @@
/*
* Copyright (c) 2023 SILA Embedded Solutions
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef _MAX31865_PUB_H
#define _MAX31865_PUB_H
#define SENSOR_ATTR_MAX31865_THREE_WIRE SENSOR_ATTR_PRIV_START
#endif /* _MAX31865_PUB_H */