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zephyr-cp: restore fixed board buses on non-nRF boards - #11638
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Only nRF SoCs have iobroker routing. On other SoCs the pinctrl states have no nRF psels, and the "all psels disconnected" test passed on the empty list. So every bus on those boards was treated as dynamically routable and left out of board, while busio could not route it either. Look for routable buses only when CONFIG_PINCTRL_NRF is set, as the iobroker pool tables already do. Non-nRF boards get their devicetree buses back as board objects. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Note by Claude, clarified by @dhalbert.
Problem first found on Feather RP2040 while trying to add
board.STEMMA_I2C().Same fix as #11619, which was closed by mistake as superseded by #11576. #11576 checks for
CONFIG_PINCTRL_NRFbefore using iobroker for board buses, but it still marks bus instances as routable on every SoC, and the fixed board objects skip routable instances.Problem
On non-nRF boards that use pinctrl,
boardhas noI2C(),SPI()orUART(). Their pinctrl states have no nRFpsels, so the "all psels disconnected" test passes on the empty list, and every bus instance is treated as routable by iobroker. The buses went missing after #11420.Fix
Look for routable bus instances only when
CONFIG_PINCTRL_NRFis set, as the iobroker pool tables already do.Testing
board.board.I2C()andboard.SPI()are back. (Tested together with an upcomingSTEMMA_I2Cchange.)make test: cptools tests 71 passed; native_sim and bsim tests 516 passed, 3 skipped.board.I2C()scan with a secondbusio.I2Con other pins at the same time,board.SPI(),board.UART()and abusio.UARTon other pins, each re-created afterdeinit().There is no
board.UART(), becauseuart0is the console. We'll fix that when the console UART becomes optional on RP2xxx, as it is on the nRF Feathers.