drivers: gpio: rpi_pico: Add support for RP2350B

As the RP2350B has more than 32 GPIO pins,
we changed the configuration so that it is split into two ports.

To do this, we created a `raspberrypi,pico-gpio-port` node and
moved the previous `raspberrypi,pico-gpio-port` functions to it.

This became a child node of `raspberrypi,pico-gpio-port`, and
`raspberrypi,pico-gpio-port` will remain a gpio mapper.

Signed-off-by: TOKITA Hiroshi <[email protected]>

Author: soburi

boards/raspberrypi/rpi_pico2/rpi_pico2.dtsi

@@ -97,7 +97,7 @@
 	pinctrl-names = "default";
 };
 
-&gpio0 {
+gpio0_lo: &gpio0 {
 	status = "okay";
 };
 

doc/releases/migration-guide-4.2.rst

@@ -37,9 +37,21 @@ Boards
 Device Drivers and Devicetree
 *****************************
 
+Ethernet
+========
+
 * Removed Kconfig option ``ETH_STM32_HAL_MII`` (:github:`86074`).
   PHY interface type is now selected via the ``phy-connection-type`` property in the device tree.
 
+GPIO
+====
+
+* To support the RP2350B, which has many pins, the RaspberryPi-GPIO configuration has
+  been changed. The previous role of :dtcompatible:`raspberrypi,rpi-gpio` has been migrated to
+  :dtcompatible:`raspberrypi,rpi-gpio-port`, and :dtcompatible:`raspberrypi,rpi-gpio` is
+  now left as a placeholder and mapper.
+  The labels have also been changed along, so no changes are necessary for regular use.
+
 Bluetooth
 *********
 

drivers/gpio/Kconfig.rpi_pico

@@ -3,7 +3,7 @@
 
 config GPIO_RPI_PICO
 	default y
-	depends on DT_HAS_RASPBERRYPI_PICO_GPIO_ENABLED
+	depends on DT_HAS_RASPBERRYPI_PICO_GPIO_PORT_ENABLED
 	select PICOSDK_USE_GPIO
 	select PINCTRL
 	bool "Raspberry Pi Pico GPIO driver"