drivers: pinctrl: rp2040: extend pin override config

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

Signed-off-by: Martin Meyer <[email protected]>

Author: ebmmy

drivers/pinctrl/pinctrl_rpi_pico.c

@@ -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,

dts/bindings/pinctrl/raspberrypi,pico-pinctrl.yaml

@@ -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.

soc/raspberrypi/rpi_pico/common/pinctrl_soc.h

@@ -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),			\
 	},
 
 /**