On Wed, 2024-10-23 at 10:47 +0200, Krzysztof Kozlowski wrote: > On Tue, Oct 22, 2024 at 05:56:48PM +0200, Antonio Borneo wrote: > > From: Fabien Dessenne <fabien.dessenne@xxxxxxxxxxx> > > > > Document the RSVD (Reserved) mux function, used to reserve pins > > for a coprocessor not running Linux. > > > > Signed-off-by: Fabien Dessenne <fabien.dessenne@xxxxxxxxxxx> > > Signed-off-by: Antonio Borneo <antonio.borneo@xxxxxxxxxxx> > > --- > > .../devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml | 8 ++++++++ > > include/dt-bindings/pinctrl/stm32-pinfunc.h | 1 + > > 2 files changed, 9 insertions(+) > > > > BTW, which *existing* SoCs use it? Aren't you adding it for the new > platform? > This is already used in ST downstream kernel for STM32MP15x In this example https://github.com/STMicroelectronics/linux/blob/v6.1-stm32mp/arch/arm/boot/dts/stm32mp157f-dk2-m4-examples.dts#L112 the GPIOs for LED and for PWM are assigned to the Cortex-M4 and Linux (on Cortex-A7) is not supposed to touch them. Regards, Antonio
