zephyr: Introduce Dynamic pinctrl. #18255
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| @dpgeorge Updated version that does pins. usage: import machine rx = machine.Pin(None, "UART1_RX_P7", mode=machine.Pin.IN) tx = machine.Pin(None, alt="UART1_TX_P6", mode=machine.Pin.OUT) ser = machine.UART("uart1", rx=rx, tx=tx) ser.write("Hello world\n")import machine tx = machine.Pin(None, alt="GPIO14_UART1_TX", mode=0) ser = machine.UART("uart1", tx=tx) ser.write("Hello world\n")Please check if this matches expectations and validate the way it has been implement in UART so i can do the same implementation for the other peripherals. |
VynDragon force-pushed the zephyr_dynpinctrl_Pin branch 2 times, most recently from f1b2017 to 2af92c6 Compare 
Introduce Dynamic pinctrl to micropython zephyr port. Signed-off-by: Vdragon <mail@massdriver.space>
Enables Dynamic Pinctrl on RP2 boards. Signed-off-by: Vdragon <mail@massdriver.space>
Adds some bflb boards that support dynamic pinctrl Signed-off-by: Vdragon <mail@massdriver.space>
VynDragon force-pushed the zephyr_dynpinctrl_Pin branch from 2af92c6 to cd5667c Compare 
josuah reviewed Oct 13, 2025
Comment on lines +233 to +235
| mp_map_t kw_args; | ||
| mp_map_init_fixed_table(&kw_args, n_kw, args + n_args); | ||
| machine_pin_pinctrl_obj_init_helper(pin, n_args - 1, args + 1, &kw_args); |
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Would it be interesting to move this after the if { ... } else if { ... } else { ... }?
AFAIU, currently:
pin = Pin(("gpioA", 3)) # allowed pin = Pin(Null, alt="SET_PIN_A3_TO_GPIO") # allowed pin = Pin(("gpioA", 3), alt="SET_PIN_A3_TO_GPIO") # refusedThe latter could be handy if pins are moved back and forth between GPIO and other function, or if the board default is not GPIO.
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I will gather time to test it and make a complete review, and also if I can, add doc but can't guarantee ETAs on that yet.
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That is intended, the later can cause several issues.
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Introduce Dynamic pinctrl to micropython zephyr port.
same as #18016 but closer to other ports
Summary
Testing
rp2040, rp2350, bl602, bl702, bl616
Trade-offs and Alternatives
Some Pin-related things were changed and added, like IN and OUT really meaning IN and OUT now