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drivers: serial: stm32 uart driver avoid LOG_WRN when going to sleep

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When the LOG_WRN is used on stm32 uart driver it could block
execution : when pin state for sleep mode is not defined by the DTS
even if no error is raised, LOG_ msg is crashing when entering sleep mode.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2023-02-03 15:10:56 +01:00 • committed by Fabio Baltieri
commit 7dff172519
1 changed files with 8 additions and 4 deletions
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12
drivers/serial/uart_stm32.c
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@ -1792,10 +1792,14 @@ static int uart_stm32_pm_action(const struct device *dev,
/* Move pins to sleep state */ /* Move pins to sleep state */
err = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_SLEEP); err = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_SLEEP);
if (err == -ENOENT) { if ((err < 0) && (err != -ENOENT)) {
/* Warn but don't block PM suspend */ /*
LOG_WRN("(LP)UART pinctrl sleep state not available "); * If returning -ENOENT, no pins where defined for sleep mode :
} else if (err < 0) { * Do not output on console (might sleep already) when going to sleep,
* "(LP)UART pinctrl sleep state not available"
* and don't block PM suspend.
* Else return the error.
*/
return err; return err;
} }
break; break;