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drivers: stm32_temp stm32h5 device must disable icache to access cal

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Reading the temperature calibration data requires disabling the icache
of the stm32h5x mcu.
Else a bus fault error occurs reading Address: 0x8fff8014-0x8fff818
Enable afterwards.

Signed-off-by: Brian Juel Folkmann <bju@trackunit.com>
This commit is contained in:
Brian Juel Folkmann 2023-04-24 12:22:10 +02:00 • committed by Carles Cufí
commit 065a8f25e1
1 changed files with 13 additions and 0 deletions
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13
drivers/sensor/stm32_temp/stm32_temp.c
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@ -10,6 +10,9 @@
#include <zephyr/drivers/sensor.h>
#include <zephyr/drivers/adc.h>
#include <zephyr/logging/log.h>
#if defined(CONFIG_SOC_SERIES_STM32H5X)
#include <stm32_ll_icache.h>
#endif /* CONFIG_SOC_SERIES_STM32H5X */
LOG_MODULE_REGISTER(stm32_temp, CONFIG_SENSOR_LOG_LEVEL);
#define CAL_RES 12
@ -98,6 +101,11 @@ static int stm32_temp_channel_get(const struct device *dev, enum sensor_channel
}
#if HAS_CALIBRATION
#if defined(CONFIG_SOC_SERIES_STM32H5X)
LL_ICACHE_Disable();
#endif /* CONFIG_SOC_SERIES_STM32H5X */
temp = ((float)data->raw * adc_ref_internal(data->adc)) / cfg->cal_vrefanalog;
temp -= (*cfg->cal1_addr >> cfg->ts_cal_shift);
#if HAS_SINGLE_CALIBRATION
@ -110,6 +118,11 @@ static int stm32_temp_channel_get(const struct device *dev, enum sensor_channel
temp /= ((*cfg->cal2_addr - *cfg->cal1_addr) >> cfg->ts_cal_shift);
#endif
temp += cfg->cal1_temp;
#if defined(CONFIG_SOC_SERIES_STM32H5X)
LL_ICACHE_Enable();
#endif /* CONFIG_SOC_SERIES_STM32H5X */
#else
/* Sensor value in millivolts */
int32_t mv = data->raw * adc_ref_internal(data->adc) / 0x0FFF;