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drivers: sensor: sifli: add sf32lb temp sensor
Add temp sensor driver for sf32lb platform Signed-off-by: Qingsong Gou <gouqs@hotmail.com>
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‎drivers/sensor/CMakeLists.txt‎

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@@ -30,6 +30,7 @@ add_subdirectory(renesas)
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add_subdirectory(rohm)
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add_subdirectory(seeed)
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add_subdirectory(sensirion)
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add_subdirectory(sifli)
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add_subdirectory(silabs)
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add_subdirectory(st)
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add_subdirectory(tdk)

‎drivers/sensor/Kconfig‎

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@@ -117,6 +117,7 @@ source "drivers/sensor/renesas/Kconfig"
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source "drivers/sensor/rohm/Kconfig"
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source "drivers/sensor/seeed/Kconfig"
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source "drivers/sensor/sensirion/Kconfig"
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source "drivers/sensor/sifli/Kconfig"
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source "drivers/sensor/silabs/Kconfig"
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source "drivers/sensor/st/Kconfig"
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source "drivers/sensor/tdk/Kconfig"

‎drivers/sensor/sifli/CMakeLists.txt‎

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# Copyright (c) 2025, Qingsong Gou <gouqs@hotmail.com>
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# SPDX-License-Identifier: Apache-2.0
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add_subdirectory_ifdef(CONFIG_SF32LB_TSEN sf32lb_tsen)

‎drivers/sensor/sifli/Kconfig‎

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# Copyright (c) 2025, Qingsong Gou <gouqs@hotmail.com>
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# SPDX-License-Identifier: Apache-2.0
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source "drivers/sensor/sifli/sf32lb_tsen/Kconfig"

‎drivers/sensor/sifli/sf32lb_tsen/CMakeLists.txt‎

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# Copyright (c) 2025, Qingsong Gou <gouqs@hotmail.com>
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# SPDX-License-Identifier: Apache-2.0
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zephyr_library()
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zephyr_library_sources(sf32lb_tsen.c)

‎drivers/sensor/sifli/sf32lb_tsen/Kconfig‎

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# Copyright (c) 2025, Qingsong Gou <gouqs@hotmail.com>
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# SPDX-License-Identifier: Apache-2.0
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config SF32LB_TSEN
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bool "SIFLI SF32LB TSEN temperature sensor driver"
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default y
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depends on DT_HAS_SIFLI_SF32LB_TSEN_ENABLED
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help
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Enable driver for the SIFLI SF32LB on-chip temperature sensor (TSEN).

‎drivers/sensor/sifli/sf32lb_tsen/sf32lb_tsen.c‎

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/*
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* Copyright (c) 2025, Qingsong Gou <gouqs@hotmail.com>
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT sifli_sf32lb_tsen
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#include <zephyr/kernel.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/clock_control/sf32lb.h>
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#include <zephyr/drivers/sensor.h>
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#include <zephyr/logging/log.h>
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#include <register.h>
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#define TSEN_CTRL_REG offsetof(TSEN_TypeDef, TSEN_CTRL_REG)
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#define TSEN_RDATA offsetof(TSEN_TypeDef, TSEN_RDATA)
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#define TSEN_IRQ offsetof(TSEN_TypeDef, TSEN_IRQ)
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#define SYS_CFG_ANAU_CR offsetof(HPSYS_CFG_TypeDef, ANAU_CR)
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LOG_MODULE_REGISTER(sf32lb_tsen, CONFIG_SENSOR_LOG_LEVEL);
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struct sf32lb_tsen_config {
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uintptr_t base;
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uintptr_t cfg_base;
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struct sf32lb_clock_dt_spec clock;
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};
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struct sf32lb_tsen_data {
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struct k_mutex mutex;
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uint32_t last_temp;
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};
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static int sf32lb_tsen_sample_fetch(const struct device *dev, enum sensor_channel chan)
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{
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const struct sf32lb_tsen_config *config = dev->config;
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struct sf32lb_tsen_data *data = dev->data;
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k_mutex_lock(&data->mutex, K_FOREVER);
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while (!sys_test_bit(config->base + TSEN_IRQ, TSEN_TSEN_IRQ_TSEN_IRSR_Pos)) {
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}
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data->last_temp = sys_read32(config->base + TSEN_RDATA);
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sys_set_bit(config->base + TSEN_IRQ, TSEN_TSEN_IRQ_TSEN_ICR_Pos);
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k_mutex_unlock(&data->mutex);
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return 0;
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}
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static int sf32lb_tsen_channel_get(const struct device *dev, enum sensor_channel chan,
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struct sensor_value *val)
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{
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struct sf32lb_tsen_data *data = dev->data;
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float temp;
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if (chan != SENSOR_CHAN_DIE_TEMP) {
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return -ENOTSUP;
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}
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temp = ((int32_t)data->last_temp + 3000) * 749.2916 / 10100 - 277; /* see manual 8.2.3.2 */
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return sensor_value_from_float(val, temp);
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}
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static const struct sensor_driver_api sf32lb_tsen_driver_api = {
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.sample_fetch = sf32lb_tsen_sample_fetch,
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.channel_get = sf32lb_tsen_channel_get,
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};
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static int sf32lb_tsen_init(const struct device *dev)
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{
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const struct sf32lb_tsen_config *config = dev->config;
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struct sf32lb_tsen_data *data = dev->data;
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int ret;
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if (!sf32lb_clock_is_ready_dt(&config->clock)) {
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return -ENODEV;
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}
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ret = sf32lb_clock_control_on_dt(&config->clock);
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if (ret < 0) {
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return ret;
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}
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if (!sys_test_bit(config->cfg_base + SYS_CFG_ANAU_CR, HPSYS_CFG_ANAU_CR_EN_BG_Pos)) {
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sys_set_bit(config->cfg_base + SYS_CFG_ANAU_CR, HPSYS_CFG_ANAU_CR_EN_BG_Pos);
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}
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sys_clear_bit(config->base + TSEN_CTRL_REG, TSEN_TSEN_CTRL_REG_ANAU_TSEN_RSTB_Pos);
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sys_set_bit(config->base + TSEN_CTRL_REG, TSEN_TSEN_CTRL_REG_ANAU_TSEN_EN_Pos);
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sys_set_bit(config->base + TSEN_CTRL_REG, TSEN_TSEN_CTRL_REG_ANAU_TSEN_PU_Pos);
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sys_set_bit(config->base + TSEN_CTRL_REG, TSEN_TSEN_CTRL_REG_ANAU_TSEN_RSTB_Pos);
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k_busy_wait(20);
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sys_set_bit(config->base + TSEN_CTRL_REG, TSEN_TSEN_CTRL_REG_ANAU_TSEN_RUN_Pos);
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k_mutex_init(&data->mutex);
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return ret;
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}
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#define SF32LB_TSEN_DEFINE(inst) \
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static struct sf32lb_tsen_data sf32lb_tsen_data_##inst; \
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static const struct sf32lb_tsen_config sf32lb_tsen_config_##inst = { \
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.base = DT_INST_REG_ADDR(inst), \
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.cfg_base = DT_REG_ADDR(DT_INST_PHANDLE(inst, sifli_cfg)), \
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.clock = SF32LB_CLOCK_DT_INST_SPEC_GET(inst), \
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}; \
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SENSOR_DEVICE_DT_INST_DEFINE(inst, sf32lb_tsen_init, NULL, &sf32lb_tsen_data_##inst, \
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&sf32lb_tsen_config_##inst, POST_KERNEL, \
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CONFIG_SENSOR_INIT_PRIORITY, &sf32lb_tsen_driver_api);
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DT_INST_FOREACH_STATUS_OKAY(SF32LB_TSEN_DEFINE)

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