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feat(st-uart): manage STM32MP_RECONFIGURE_CONSOLE

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If the flag STM32MP_RECONFIGURE_CONSOLE is set in BL32, the UART init
should be skipped if the UART clock is set to zero. This will be used
when configuring the default console, after an early console has been
configured.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: Icbc640c7bdd6342f9c3ec1586a0d0c64127b18b8
This commit is contained in:
Yann Gautier 2022-09-13 13:55:43 +02:00 • committed by Yann Gautier
parent 156709ddde
commit ea69dcdc73
1 changed files with 6 additions and 0 deletions
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6
drivers/st/uart/aarch32/stm32_console.S
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@ -46,10 +46,16 @@ func console_stm32_core_init
cmp r0, #0
beq core_init_fail
#if !defined(IMAGE_BL2)
#if STM32MP_RECONFIGURE_CONSOLE
/* UART clock rate is set to 0 in BL32, skip init in that case */
cmp r1, #0
beq 1f
#else /* STM32MP_RECONFIGURE_CONSOLE */
/* Skip UART initialization if it is already enabled */
ldr r3, [r0, #USART_CR1]
ands r3, r3, #USART_CR1_UE
bne 1f
#endif /* STM32MP_RECONFIGURE_CONSOLE */
#endif /* IMAGE_BL2 */
/* Check baud rate and uart clock for sanity */
cmp r1, #0