soc: rp2350: Add initial support for the Raspberry Pi RP2350

RP2350 is Raspberry Pi's newest SoC. From the datasheet:

"RP2350 is a new family of microcontrollers from Raspberry Pi that
offers significant enhancements over RP2040. Key features include:
• Dual Cortex-M33 or Hazard3 processors at 150 MHz
• 520 kB on-chip SRAM, in 10 independent banks
• 8 kB of one-time-programmable storage (OTP)
• Up to 16 MB of external QSPI flash/PSRAM via dedicated QSPI bus
...
"

This commit introduces some changes to support the existing RP2040 and
what is describe by Raspberry Pi as the "RP2350 family". Currently there
are 4 published products in the family: RP2350A, RP2350B, RP2354A, and
RP2354A. Within Zephyr's taxonomy, split the configuration as follows:
Family: Raspberry Pi Pico. This contains all RP2XXX SoCs,
SoC Series: RP2040 and RP2350.
SoC: RP2040 and, for now, just the RP2350A, which is present on the Pico
2, where the A suffix indicates  QFN-60 package type. This structure is
reflected in `soc/raspberrypi/soc.yml`, and somewhat assumes that there
won't be a RP2050, for example, as a RP2040 with more RAM.

This is foundation work ahead of introducing support for Raspberry Pi's
Pico 2 board, which is fitted with a RP2350A and 4MB of flash.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

Kconfig.zephyr

@@ -793,7 +793,7 @@ config BUILD_OUTPUT_UF2_FAMILY_ID
 	default "0xada52840" if SOC_NRF52840_QIAA
 	default "0x4fb2d5bd" if SOC_SERIES_IMXRT10XX || SOC_SERIES_IMXRT11XX
 	default "0x2abc77ec" if SOC_SERIES_LPC55XXX
-	default "0xe48bff56" if SOC_SERIES_RP2XXX
+	default "0xe48bff56" if SOC_SERIES_RP2040
 	default "0x68ed2b88" if SOC_SERIES_SAMD21
 	default "0x55114460" if SOC_SERIES_SAMD51
 	default "0x647824b6" if SOC_SERIES_STM32F0X

drivers/hwinfo/Kconfig

@@ -130,7 +130,7 @@ config HWINFO_IMXRT
 config HWINFO_RPI_PICO
 	bool "Raspberry Pi Pico hwinfo driver"
 	default y
-	depends on SOC_SERIES_RP2XXX
+	depends on SOC_FAMILY_RPI_PICO
 	select HWINFO_HAS_DRIVER
 	select PICOSDK_USE_FLASH
 	help

dts/arm/raspberrypi/rpi_pico/m33.dtsi

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2024 Andrew Featherstone
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <arm/armv8-m.dtsi>
+
+/* Model in the device tree a Cortex-M33 core being 'plugged' into each
+ * 'socket' within the SoC. Within the datasheet these are core 0 and core 1.
+ */
+&cpu0 {
+	compatible = "arm,cortex-m33";
+};
+
+&cpu1 {
+	compatible = "arm,cortex-m33";
+};
+
+&nvic {
+	arm,num-irq-priority-bits = <4>;
+};