To work efficiently, SPI_NSS pins require pull-up configuration.
Fix this for whole STM32 series.
Fixes#17998
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Any word started with underscore followed by and uppercase letter or a
second underscore is a reserved word according with C99.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
STM32 pin configuration comments where offset by 4 bits.
Fix this issue and make pin configuration settings
easier to read.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Add needed uart pinctrl configuration in pinmux node.
This is done thanks to <soc>-pinctrl.dtsi file matching
the <soc>.dtsi files
Populate stm32 f4 based boards dts files with references
to uart pinctrl nodes.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Add pinmux yaml file and bindings before introduction
of pinmux node in stm32 soc device tree files
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
