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drivers: i3c: stm32: fix clock init for i2c fast mode plus #87082

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Merged
merged 1 commit into from
Apr 21, 2025
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drivers: i3c: stm32: fix clock init for i2c fast mode plus #87082

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15 changes: 8 additions & 7 deletions drivers/i3c/i3c_stm32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -473,15 +473,16 @@ static int i3c_stm32_calc_scll_od_sclh_i2c(const struct device *dev, uint32_t i2
1000000000ull) -
1;
*sclh_i2c = DIV_ROUND_UP(i3c_clock, i2c_bus_freq) - *scll_od - 2;
if (*sclh_i2c <
(DIV_ROUND_UP(STM32_I3C_SCLH_I2C_MIN_FM_NS * i3c_clock,
1000000000ull) - 1)
) {
LOG_ERR("Cannot find a combination of SCLL_OD and SCLH_I2C at "
"current I3C clock frequency for FM I2C bus");
return -EINVAL;
}
}

if (*sclh_i2c <
DIV_ROUND_UP(STM32_I3C_SCLH_I2C_MIN_FM_NS * i3c_clock, 1000000000ull) - 1) {
LOG_ERR("Cannot find a combination of SCLL_OD and SCLH_I2C at current I3C "
"clock "
"frequency for FM I2C bus");
return -EINVAL;
}
} else {
if (config->drv_cfg.dev_list.num_i2c > 0) {
enum i3c_bus_mode mode = i3c_bus_mode(&config->drv_cfg.dev_list);
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