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drivers/clock_control: stm32h7_m4: Don't rely on rcc "clocks" property

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In prts of the code, we use rcc node "clocks" property to testify the
use of device tree for clocks configuration.
This doesn't work in case of stm32h7 m4 targets as for those,
"upstream rcc" clock configuration, such as sysclk source selection,
is done on m7 core and hence rcc node doesn't have a "clocks"
property.
To work around this, use alternate "d1cpre" property in case of
stm32h7 targets.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2021-05-05 09:28:35 +02:00 committed by Kumar Gala
parent 05b7476664
commit edaeef1cea
2 changed files with 2 additions and 2 deletions
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2
drivers/clock_control/Kconfig.stm32
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@ -44,7 +44,7 @@ config CLOCK_STM32_HSE_CLOCK
config CLOCK_CONTROL_STM32_HAS_DTS
bool
default y if "$(dt_node_has_prop,rcc,clocks)"
default y if "$(dt_node_has_prop,rcc,clocks)" || "$(dt_node_has_prop,rcc,d1cpre)"
help
This symbol is added to prevent default use of CLOCK_CONTROL_STM32_* symbols
when board make use of device tree to configure clocks.

2
include/drivers/clock_control/stm32_clock_control.h
View File

@ -135,7 +135,7 @@
#endif
#if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(rcc), st_stm32h7_rcc, okay) && \
DT_NODE_HAS_PROP(DT_NODELABEL(rcc), clocks)
DT_NODE_HAS_PROP(DT_NODELABEL(rcc), d1cpre)
#define STM32_D1CPRE DT_PROP(DT_NODELABEL(rcc), d1cpre)
#define STM32_HPRE DT_PROP(DT_NODELABEL(rcc), hpre)
#define STM32_D2PPRE1 DT_PROP(DT_NODELABEL(rcc), d2ppre1)