soc: st: stm32u3: add flash prefetch

etienne-lms · jhedberg · commit 7c47bc9320c8 · 2025-10-03T12:50:47.000+03:00
Implement flash prefetch for STM32U3xx SoCs.

Signed-off-by: Etienne Carriere &lt;etienne.carriere@st.com&gt;
diff --git a/soc/st/stm32/stm32u3x/soc.c b/soc/st/stm32/stm32u3x/soc.c
@@ -29,6 +29,8 @@ LOG_MODULE_REGISTER(soc);
 void soc_early_init_hook(void)
 {
 	/* Enable ART Accelerator prefetch */
+	__HAL_FLASH_PREFETCH_BUFFER_ENABLE();
+
 	sys_cache_instr_enable();
 
 	/* Update CMSIS SystemCoreClock variable (HCLK) */

Original file line number	Diff line number	Diff line change
`@@ -29,6 +29,8 @@ LOG_MODULE_REGISTER(soc);`
`29`	`29`	`void soc_early_init_hook(void)`
`30`	`30`	`{`
`31`	`31`	`/* Enable ART Accelerator prefetch */`
	`32`	`+ __HAL_FLASH_PREFETCH_BUFFER_ENABLE();`
	`33`	`+`
`32`	`34`	`sys_cache_instr_enable();`
`33`	`35`
`34`	`36`	`/* Update CMSIS SystemCoreClock variable (HCLK) */`