drivers: usb: udc: stm32: fix N6 power-up sequence logic

mathieuchopstm · jhedberg · commit f413980cc0ef · 2025-10-21T17:21:18.000+03:00
Actually do what the comment says and wait for Vdd33USB to be ready,
instead of waiting for the opposite.

Signed-off-by: Mathieu Choplain &lt;mathieu.choplain-ext@st.com&gt;
diff --git a/drivers/usb/udc/udc_stm32.c b/drivers/usb/udc/udc_stm32.c
@@ -1258,10 +1258,10 @@ static int priv_clock_enable(void)
 		}
 	#endif /* DT_HAS_COMPAT_STATUS_OKAY(st_stm32_otghs) */
 #elif defined(CONFIG_SOC_SERIES_STM32N6X)
-	/* Enable Vdd USB voltage monitoring */
+	/* Enable Vdd33USB voltage monitoring */
 	LL_PWR_EnableVddUSBMonitoring();
-	while (__HAL_PWR_GET_FLAG(PWR_FLAG_USB33RDY)) {
-		/* Wait FOR VDD33USB ready */
+	while (!LL_PWR_IsActiveFlag_USB33RDY()) {
+		/* Wait for Vdd33USB ready */
 	}
 
 	/* Enable VDDUSB */

Original file line number	Diff line number	Diff line change
`@@ -1258,10 +1258,10 @@ static int priv_clock_enable(void)`
`1258`	`1258`	`}`
`1259`	`1259`	`#endif /* DT_HAS_COMPAT_STATUS_OKAY(st_stm32_otghs) */`
`1260`	`1260`	`#elif defined(CONFIG_SOC_SERIES_STM32N6X)`
`1261`		`- /* Enable Vdd USB voltage monitoring */`
	`1261`	`+ /* Enable Vdd33USB voltage monitoring */`
`1262`	`1262`	`LL_PWR_EnableVddUSBMonitoring();`
`1263`		`- while (__HAL_PWR_GET_FLAG(PWR_FLAG_USB33RDY)) {`
`1264`		`- /* Wait FOR VDD33USB ready */`
	`1263`	`+ while (!LL_PWR_IsActiveFlag_USB33RDY()) {`
	`1264`	`+ /* Wait for Vdd33USB ready */`
`1265`	`1265`	`}`
`1266`	`1266`
`1267`	`1267`	`/* Enable VDDUSB */`