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drivers: sensor: Enable NXP pmc tmpsns driver
This commit introduced NXP pmc temperature sensor (pmc-tmpsns) driver. Signed-off-by: Zhaoxiang Jin <[email protected]>
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‎drivers/sensor/nxp/CMakeLists.txt‎

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@@ -7,6 +7,7 @@ add_subdirectory_ifdef(CONFIG_FXLS8974 fxls8974)
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add_subdirectory_ifdef(CONFIG_FXOS8700 fxos8700)
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add_subdirectory_ifdef(CONFIG_LPADC_TEMP40 nxp_lpadc_temp40)
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add_subdirectory_ifdef(CONFIG_MCUX_LPCMP mcux_lpcmp)
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add_subdirectory_ifdef(CONFIG_NXP_PMC_TMPSNS nxp_pmc_tmpsns)
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add_subdirectory_ifdef(CONFIG_NXP_TEMPMON nxp_tempmon)
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add_subdirectory_ifdef(CONFIG_NXP_TMPSNS nxp_tmpsns)
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add_subdirectory_ifdef(CONFIG_P3T1755 p3t1755)

‎drivers/sensor/nxp/Kconfig‎

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@@ -9,6 +9,7 @@ source "drivers/sensor/nxp/mcux_acmp/Kconfig"
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source "drivers/sensor/nxp/mcux_lpcmp/Kconfig"
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source "drivers/sensor/nxp/nxp_kinetis_temp/Kconfig"
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source "drivers/sensor/nxp/nxp_lpadc_temp40/Kconfig"
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source "drivers/sensor/nxp/nxp_pmc_tmpsns/Kconfig"
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source "drivers/sensor/nxp/nxp_tempmon/Kconfig"
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source "drivers/sensor/nxp/nxp_tmpsns/Kconfig"
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source "drivers/sensor/nxp/p3t1755/Kconfig"

‎drivers/sensor/nxp/nxp_pmc_tmpsns/CMakeLists.txt‎

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# Copyright 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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zephyr_library()
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zephyr_library_sources(nxp_pmc_tmpsns.c)

‎drivers/sensor/nxp/nxp_pmc_tmpsns/Kconfig‎

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# Copyright 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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config NXP_PMC_TMPSNS
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bool "NXP PMC Temperature Sensor (TMPSNS)"
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default y
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depends on DT_HAS_NXP_PMC_TMPSNS_ENABLED
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select FPU if CPU_HAS_FPU
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help
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Enable driver for the NXP PMC temperature sensor.
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This is used to retrieve on-die operational temperature.
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if NXP_PMC_TMPSNS
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config NXP_PMC_TMPSNS_CALIBRATION_OTP_FUSE_INDEX
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int "OTP FUSE index"
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default 77 if SOC_SERIES_IMXRT7XX
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help
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TSENS_CAL is an 8-bit signed calibration constant
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retrieved from non-volatile memory. We need this
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index to read the fuse to get TSENS_CAL.
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endif

‎drivers/sensor/nxp/nxp_pmc_tmpsns/nxp_pmc_tmpsns.c‎

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "fsl_romapi_otp.h"
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#include <zephyr/device.h>
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#include <zephyr/devicetree.h>
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#include <zephyr/drivers/sensor.h>
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#include <zephyr/drivers/adc.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(nxp_pmc_tmpsns, CONFIG_SENSOR_LOG_LEVEL);
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#define DT_DRV_COMPAT nxp_pmc_tmpsns
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struct nxp_pmc_tmpsns_config {
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const struct device *adc;
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struct adc_sequence adc_seq;
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struct adc_channel_cfg ch_cfg;
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};
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struct nxp_pmc_tmpsns_data {
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uint16_t buffer;
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uint32_t pmc_tmpsns_calibration;
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float pmc_tmpsns_value;
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};
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static int nxp_pmc_tmpsns_sample_fetch(const struct device *dev, enum sensor_channel chan)
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{
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uint8_t pmc_tmpsns_select[15] = {0, 1, 3, 2, 6, 7, 5, 4, 5, 7, 6, 2, 3, 1, 0};
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const struct nxp_pmc_tmpsns_config *config = dev->config;
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struct nxp_pmc_tmpsns_data *data = dev->data;
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uint16_t pmc_tmpsns_value[15] = {0};
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float cm_vref, cm_ctat, cm_temp;
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int8_t calibration = 0;
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int ret;
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if (chan != SENSOR_CHAN_ALL && chan != SENSOR_CHAN_DIE_TEMP) {
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return -ENOTSUP;
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}
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for (uint8_t index = 0; index < 15; ++index) {
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PMC0->TSENSOR = PMC_TSENSOR_TSENSM(pmc_tmpsns_select[index]);
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ret = adc_read(config->adc, &config->adc_seq);
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if (ret) {
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LOG_ERR("Failed to read ADC channels with code %d", ret);
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return ret;
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}
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pmc_tmpsns_value[index] = data->buffer;
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}
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cm_ctat = (float)(2 * pmc_tmpsns_value[1] - pmc_tmpsns_value[2] +
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2 * pmc_tmpsns_value[13] - pmc_tmpsns_value[12] +
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2 * pmc_tmpsns_value[6] - pmc_tmpsns_value[5] +
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2 * pmc_tmpsns_value[8] - pmc_tmpsns_value[9]) / 4.0f;
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cm_temp = (float)(2 * pmc_tmpsns_value[0] - pmc_tmpsns_value[3] +
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2 * pmc_tmpsns_value[14] - pmc_tmpsns_value[11] +
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4 * pmc_tmpsns_value[7] - pmc_tmpsns_value[4] -
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pmc_tmpsns_value[10]) / 4.0f;
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calibration = (int8_t)(data->pmc_tmpsns_calibration & 0xFF);
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cm_vref = cm_ctat + (953.36f + calibration) * cm_temp / 2048;
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data->pmc_tmpsns_value = 370.98f * (cm_temp / cm_vref) - 273.15f;
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return 0;
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}
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static int nxp_pmc_tmpsns_channel_get(const struct device *dev,
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enum sensor_channel chan,
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struct sensor_value *val)
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{
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const struct nxp_pmc_tmpsns_data *data = dev->data;
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if (chan != SENSOR_CHAN_DIE_TEMP) {
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return -ENOTSUP;
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}
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return sensor_value_from_double(val, data->pmc_tmpsns_value);
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}
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static int nxp_pmc_tmpsns_init(const struct device *dev)
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{
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const struct nxp_pmc_tmpsns_config *config = dev->config;
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struct nxp_pmc_tmpsns_data *data = dev->data;
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int ret;
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if (!device_is_ready(config->adc)) {
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LOG_ERR("ADC device not ready");
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return -ENODEV;
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}
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ret = adc_channel_setup(config->adc, &config->ch_cfg);
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if (ret) {
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LOG_ERR("Failed to setup ADC channel with code %d", ret);
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return ret;
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}
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ret = otp_fuse_read(CONFIG_NXP_PMC_TMPSNS_CALIBRATION_OTP_FUSE_INDEX,
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&(data->pmc_tmpsns_calibration));
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if (ret) {
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LOG_ERR("Failed to get calibration value form FUSE.");
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return -ENOTSUP;
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}
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return 0;
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}
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static DEVICE_API(sensor, nxp_pmc_tmpsns_api) = {
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.sample_fetch = nxp_pmc_tmpsns_sample_fetch,
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.channel_get = nxp_pmc_tmpsns_channel_get,
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};
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#define NXP_PMC_TMPSNS_INIT(inst) \
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static struct nxp_pmc_tmpsns_data _CONCAT(data, inst); \
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\
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static const struct nxp_pmc_tmpsns_config _CONCAT(config, inst) = { \
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.adc = DEVICE_DT_GET(DT_INST_IO_CHANNELS_CTLR(inst)), \
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.adc_seq = { \
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.channels = BIT(DT_INST_IO_CHANNELS_INPUT(inst)), \
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.buffer = &_CONCAT(data, inst).buffer, \
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.buffer_size = sizeof(_CONCAT(data, inst)), \
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.resolution = 16, \
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.oversampling = 7, \
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}, \
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.ch_cfg = ADC_CHANNEL_CFG_DT(DT_CHILD(DT_INST_IO_CHANNELS_CTLR(inst), \
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UTIL_CAT(channel_, DT_INST_IO_CHANNELS_INPUT(inst)))), \
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}; \
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\
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SENSOR_DEVICE_DT_INST_DEFINE(inst, nxp_pmc_tmpsns_init, NULL, \
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&_CONCAT(data, inst), &_CONCAT(config, inst), \
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POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY, \
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&nxp_pmc_tmpsns_api);
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DT_INST_FOREACH_STATUS_OKAY(NXP_PMC_TMPSNS_INIT)

‎dts/bindings/sensor/nxp,pmc-tmpsns.yaml‎

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# Copyright NXP 2025
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# SPDX-License-Identifier: Apache-2.0
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description: NXP PMC temperature sensor (PMC-TMPSNS)
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compatible: "nxp,pmc-tmpsns"
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include: sensor-device.yaml
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properties:
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io-channels:
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required: true
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description: |
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This should point to an ADC channel (e.g., <&adc0 0>)
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to read from the PMC internal temperature sensor.

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