Follow the wider directory convention of dts/<arch>/<vendor>/<family>.

This is foundation work ahead of introducing support for the RP2350.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Rename rpi_pico_common.dtsi to rp2040_reset.h . This is more consistent
with the wider Zephyr source tree, and is foundation work ahead of
introducing the RP2350 SoC.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

RESETS_RESET_PLL_USB_BITS was logically or'd twice and 'unreset'ting
PWM doesn't seem to be required, based on the contents of the SDK.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

The Pico SDK defines a default value for its XOSC multiplier. Reflect
this in the device tree binding so that it doesn't need to be repeated.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

No in-tree board uses this driver's pinctrl functionality, and every
RP2040-based board was configuring this to be an empty node in the
device tree, so remove them.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Add support for SoC-specific clock ids and update the initialization
function to support the existing RP2040 and add support for the RP2350.

clock_control_rpi_pico.c uses numerical values for clock ids taken from
rpi_pico_clock.h which are the "clock generator". For the RP2350 these
values are different for some of the same logical clock sources, as well
as the RP2040 and RP2350 having different clock sources available.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

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>

Extend the existing driver to add some initial support for the new SoC,
whilst maintaining compatibility with the RP2040.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Unlike the RP2040, the RP2350 has multiple tick generators that need to
be started. Start TIMER0 and TIMER1 tick generators during
clock_control_init.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

The watchdog register configuration of RP2350 differs from that
of RP2040, so we make fit that.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

The RP2350 SoC series contain two timer peripherals. Extend the driver
to support using the second timer (`TIMER1`).

N.b. this requires a fix from the Pico SDK to be patched into
hal_rpi_pico. See raspberrypi/pico-sdk#1949 .

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

A significant amount of the pin muxing is duplicated between the RP2040,
the RP2350A, and RP2350B. Reflect this in the file structure, with a
`-common` suffix used to to indicate this.

Macros are defined in ascending order of the function index in the
relevant table in the datasheet. SoC/SoC-series specific macros are
defined in their respective tables. Functions that are not currently
used (e.g. the new HSTX) are intentionally not defined here as they do
not (currently) have any use in the Zephyr tree (i.e. there's no drivers
that make use of this functionality).

clang-format has been run over the existing definitions to reduce the
noise generated by CI. These are cosmetic changes; I've tried to retain
attribution to the relevant authors where applicable.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Change whitespace to match the coding style for CMake files for all
rp2040-based boards.

This is foundation work ahead of adding support for boards based on the
RP235XX SoCs.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

On RP2350, the alt function value can be up to 0x1F, so store as 5 bits.

Signed-off-by: Peter Johanson <peter@peterjohanson.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

The Raspberry Pi Pico 2 is Raspberry Pi's first board fitted with their
RP2350A SoC.

This adds a minimal board definition, sufficient to build and run
`samples/hello_world` and `samples/basic/blinky` on the board. Images
can be run on the target using OpenOCD. Raspberry Pi's `picotool` can
create a UF2 binary, which ensures that errata RP2350-E10 is avoided
e.g.

```
> picotool uf2 convert build\rpi_pico2\hello_world\zephyr\zephyr.elf \
    build\rpi_pico2\hello_world\zephyr\zephyr.uf2 \
    --family rp2350-arm-s --abs-block`
```

Raspberry Pi Pico 2 is a low-cost, high-performance microcontroller
board with flexible digital interfaces. Key features include:

- RP2350A microcontroller chip designed by Raspberry Pi in the United
  Kingdom
- Dual Cortex-M33 or Hazard3 processors at up to 150MHz
- 520KB of SRAM, and 4MB of on-board flash memory
- USB 1.1 with device and host support
- Low-power sleep and dormant modes
- Drag-and-drop programming using mass storage over USB
- 26x multi-function GPIO pins including 3 that can be used for ADC
- 2x SPI, 2x I2C, 2x UART, 3x 12-bit 500ksps Analogue to Digital
  Converter (ADC), 24x controllable PWM channels
- 2x Timer with 4 alarms, 1x AON Timer
- Temperature sensor
- 3x Programmable IO (PIO) blocks, 12 state machines total for custom
  peripheral support
    - Flexible, user-programmable high-speed IO
    - Can emulate interfaces such as SD Card and VGA

The Raspberry Pi Pico 2 comes as a castellated module which allows
soldering direct to carrier boards.

Only enable timer 0 for now. Timer 1 won't work correctly until the
rpi_pico HAL has picked up the fix for `hardware_alarm_irq_handler`. See
raspberrypi/pico-sdk#1949 .

Co-authored-by: Benjamin Cabé <kartben@gmail.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Add UF2 Family ID for Raspberry Pi 2350 and build
UF2 image by default for Pico 2 board

Signed-off-by: Ryan Grachek <grachek@gmail.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

The Raspberry Pi Pico 2's device is compatible with the existing Pico 1.
The build system requires a `<board>.overlay` file, but these use the
pre-processing to #include the sibling rpi_pico.overlay files rather
than duplicating the contents as an attempt to keep things DRY.

Tested locally.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

For these tests' needs, the RP2350 on the Pico 2 is compatible with the
RP2040 on the Pico 1. #include the latter's overlay in preference to
duplicating the content.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Add some documentation for the board itself (mostly aiming to refer to
canonical sources of information rather duplicate). Add entries in the
release notes where applicable.

boards/raspberrypi/rpi_pico2/doc/img/rpi_pico2.webp is a cropped and
compressed version of https://www.raspberrypi.com/documentation/microcontrollers/images/pico-2.png
which is released under the CC-BY-SA-4.0 license. See https://github.com/raspberrypi/documentation/blob/develop/LICENSE.md

Co-authored-by: Benjamin Cabé <kartben@gmail.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Add OpenOCD debugger support.
For now we will need a Raspberry Pi'a forked version of OpenOCD from
https://github.com/raspberrypi/openocd .

The default adapter speed is set to match Raspberry Pi's documentation.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Extend gpio_api_1pin so that tests can require a test fixture to provide
an external pulldown resistor to the board under test. Use the new
test-gpio-external-pulldown device tree binding to define where that
GPIO is, and, finally, add a device tree overlay for the Raspberry Pi
Pico 2 board that defines where the pulldown provided by the fixture
will be.

Tested locally using `--fixture gpio_external_pull_down` when running
Twister on the command line, or by creating and using a Hardware Map
file, in combination with a modified Pico 2.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Add initial support for the RP2350's PIO peripherals, extend the
existing example under samples/boards/raspberrypi/rpi_pico/uart_pio to
demonstrate this on the Raspberry Pi Pico 2, and update the board's
documentation.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>
Signed-off-by: Manuel Aebischer <manuel.aebischer@belden.com>

Add initial support for the RP2350's DMA peripheral, allow tests
under drivers/dma/loop_transfer to run on on the Raspberry Pi Pico 2,
and update the board's documentation.

Signed-off-by: Manuel Aebischer <manuel.aebischer@belden.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Avoid referring to Pico 2 (the name of a board). In this context,
RPI_PICO is used to refer to the (Zephyr) `SOC_FAMILY` rather than the
Pico 1 board. This clarifies common numerical values between the RP2040
and RP2350 SoC series, and enables existing DTS files to be used with
RP2350-based boards with fewer changes.

Remove the use of Zehpyr's `CONFIG_` macros from the device tree files,
and replace them with `SOC_SERIES`-specific files. Update the driver
implementation to conditionally include the correct file. Update
documentation and samples to match.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

From the API documentation, `dma_api_chan_filter`` can be given a value
of NULL for `filter_param`. Match the behaviour of most implementations,
and return true. This removes misleading error messages logged during
tests (e.g. `test_tst_dma0_m2m_loop`).

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Increase test coverage for Raspberry Pi's SoCs. Use the `socs` folder
rather than `boards` to enable these tests to run on any boards with the
same SoCs.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

The RP2350's PWM peripheral is largely unchanged from the RP2040's, but
the higher clock frequency means the long blink delay must be lower.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

Assume that users want to run a dual Cortex-M33 on the Pico 2, and
update various parts of the codebase to match. I expect the majority of
the soc's definition will move from `dts/arm/raspberrypi` to
`dts/common/raspberrypi` if/when support is added for the Hazard3 cores.

Some parts of the codebase can cope without encoding the cluster in the
filename (e.g. Twister seems to use the identifier in
`boards/raspberrypi/rpi_pico2/rpi_pico2.yaml` rather than the filename
itself), others can't (e.g. `rpi_pico2_m33_defconfig`) which itself is
a form of <board>_<cpucluster>_defconfig and doesn't refer to the SoC.
Despite this, some files have been given the verbose fully-specified
name because this matches the current documentation.

Update documentation to try to highlight the capabilities and
limitations of the current support within Zephyr for the Pico 2 board
and the underlying SoC.

Update `.overlay` and `.conf` files in `samples/` and `tests/` to match
the new requirement.

Limited tested locally with no issues found.

Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>