pinctrl: stm32: Add STM32MP157 MPU support

This driver consists of 2 controllers due to a hole in mapping:
-1 controller for GPIO bankA to K.
-1 controller for GPIO bankZ.

Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt

@@ -12,6 +12,8 @@ Required properies:
    "st,stm32f469-pinctrl"
    "st,stm32f746-pinctrl"
    "st,stm32h743-pinctrl"
+   "st,stm32mp157-pinctrl"
+   "st,stm32mp157-z-pinctrl"
  - #address-cells: The value of this property must be 1
  - #size-cells	: The value of this property must be 1
  - ranges	: defines mapping between pin controller node (parent) to

drivers/pinctrl/stm32/Kconfig

@@ -32,4 +32,10 @@ config PINCTRL_STM32H743
 	depends on OF
 	default MACH_STM32H743
 	select PINCTRL_STM32
+
+config PINCTRL_STM32MP157
+	bool "STMicroelectronics STM32MP157 pin control" if COMPILE_TEST && !MACH_STM32MP157
+	depends on OF
+	default MACH_STM32MP157
+	select PINCTRL_STM32
 endif

drivers/pinctrl/stm32/Makefile

@@ -7,3 +7,4 @@ obj-$(CONFIG_PINCTRL_STM32F429)	+= pinctrl-stm32f429.o
 obj-$(CONFIG_PINCTRL_STM32F469)	+= pinctrl-stm32f469.o
 obj-$(CONFIG_PINCTRL_STM32F746)	+= pinctrl-stm32f746.o
 obj-$(CONFIG_PINCTRL_STM32H743)	+= pinctrl-stm32h743.o
+obj-$(CONFIG_PINCTRL_STM32MP157) += pinctrl-stm32mp157.o