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drivers: pinctrl: rp2040: extend pin override config

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Add a device-tree property to configure the override
functionalities of RP2040 GPIO pins.

Signed-off-by: Martin Meyer <meyer.m90@gmail.com>
This commit is contained in:
Martin Meyer 2025-04-14 22:15:16 +02:00 • committed by Benjamin Cabé
commit 5d39cc1eea
3 changed files with 70 additions and 1 deletions
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3
drivers/pinctrl/pinctrl_rpi_pico.c
View file

@ -20,6 +20,9 @@ static void pinctrl_configure_pin(const pinctrl_soc_pin_t *pin)
gpio_set_input_hysteresis_enabled(pin->pin_num, pin->schmitt_enable);
gpio_set_input_enabled(pin->pin_num, pin->input_enable);
gpio_set_oeover(pin->pin_num, pin->oe_override);
gpio_set_outover(pin->pin_num, pin->out_override);
gpio_set_inover(pin->pin_num, pin->in_override);
gpio_set_irqover(pin->pin_num, pin->irq_override);
}
int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,

57
dts/bindings/pinctrl/raspberrypi,pico-pinctrl.yaml
View file

@ -139,4 +139,61 @@ child-binding:
- 2 (RP2_GPIO_OVERRIDE_LOW) - disable output.
- 3 (RP2_GPIO_OVERRIDE_HIGH) - enable output.
The default value is 0, as this is the power on reset value.
raspberrypi,out-override:
type: int
enum:
- 0
- 1
- 2
- 3
default: 0
description: |
Override output for a pin.
- 0 (RP2_GPIO_OVERRIDE_NORMAL) - drive output from selected
peripheral signal.
- 1 (RP2_GPIO_OVERRIDE_INVERT) - drive output from inverse of
selected peripheral signal.
- 2 (RP2_GPIO_OVERRIDE_LOW) - drive output low.
- 3 (RP2_GPIO_OVERRIDE_HIGH) - drive output high.
The default value is 0, as this is the power on reset value.
raspberrypi,in-override:
type: int
enum:
- 0
- 1
- 2
- 3
default: 0
description: |
Override input for a pin.
- 0 (RP2_GPIO_OVERRIDE_NORMAL) - drive input from selected
pin.
- 1 (RP2_GPIO_OVERRIDE_INVERT) - drive input from inverse of
selected pin.
- 2 (RP2_GPIO_OVERRIDE_LOW) - drive input low.
- 3 (RP2_GPIO_OVERRIDE_HIGH) - drive input high.
The default value is 0, as this is the power on reset value.
raspberrypi,irq-override:
type: int
enum:
- 0
- 1
- 2
- 3
default: 0
description: |
Override interrupt signal for a pin.
- 0 (RP2_GPIO_OVERRIDE_NORMAL) - drive interrupt signal to selected
peripheral.
- 1 (RP2_GPIO_OVERRIDE_INVERT) - drive interrupt signal from inverse to
selected peripheral.
- 2 (RP2_GPIO_OVERRIDE_LOW) - drive interrupt signal low.
- 3 (RP2_GPIO_OVERRIDE_HIGH) - drive interrupt signal high.
The default value is 0, as this is the power on reset value.

11
soc/raspberrypi/rpi_pico/common/pinctrl_soc.h
View file

@ -31,6 +31,12 @@ struct rpi_pinctrl_soc_pin {
uint32_t schmitt_enable : 1;
/** Output-enable override */
uint32_t oe_override : 2;
/** Output override */
uint32_t out_override : 2;
/** Input override */
uint32_t in_override : 2;
/** Interrupt override */
uint32_t irq_override : 2;
};
typedef struct rpi_pinctrl_soc_pin pinctrl_soc_pin_t;
@ -52,7 +58,10 @@ typedef struct rpi_pinctrl_soc_pin pinctrl_soc_pin_t;
DT_PROP(node_id, bias_pull_down), \
DT_PROP(node_id, input_enable), \
DT_PROP(node_id, input_schmitt_enable), \
DT_PROP(node_id, raspberrypi_oe_override), \
DT_PROP(node_id, raspberrypi_oe_override), \
DT_PROP(node_id, raspberrypi_out_override), \
DT_PROP(node_id, raspberrypi_in_override), \
DT_PROP(node_id, raspberrypi_irq_override), \
},
/**