drivers: gpio: rpi_pico: add missing offsets

Fixed several occurrences of offset not being calculated in case
multiple GPIO ports are present.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

drivers/gpio/gpio_rpi_pico.c

@@ -128,12 +128,12 @@ static int gpio_rpi_configure(const struct device *dev,
 	struct gpio_rpi_data *data = dev->data;
 
 	if (flags == GPIO_DISCONNECTED) {
-		gpio_disable_pulls(pin);
+		gpio_disable_pulls(pin + offset);
 		/* This is almost the opposite of the Pico SDK's gpio_set_function. */
-		hw_write_masked(&pads_bank0_hw->io[pin], PADS_BANK0_GPIO0_OD_BITS,
+		hw_write_masked(&pads_bank0_hw->io[pin + offset], PADS_BANK0_GPIO0_OD_BITS,
 				PADS_BANK0_GPIO0_IE_BITS | PADS_BANK0_GPIO0_OD_BITS);
 #ifdef CONFIG_SOC_SERIES_RP2350
-		hw_set_bits(&pads_bank0_hw->io[pin], PADS_BANK0_GPIO0_ISO_BITS);
+		hw_set_bits(&pads_bank0_hw->io[pin + offset], PADS_BANK0_GPIO0_ISO_BITS);
 #endif
 		return 0;
 	}
@@ -205,7 +205,7 @@ static int gpio_rpi_get_config(const struct device *dev, gpio_pin_t pin, gpio_fl
 		}
 	}
 
-	if (pads_bank0_hw->io[pin] & PADS_BANK0_GPIO0_IE_BITS) {
+	if (pads_bank0_hw->io[pin + offset] & PADS_BANK0_GPIO0_IE_BITS) {
 		*flags |= GPIO_INPUT;
 	}
 
@@ -340,14 +340,16 @@ static uint32_t gpio_rpi_get_pending_int(const struct device *dev)
 static int gpio_rpi_port_get_direction(const struct device *port, gpio_port_pins_t map,
 				  gpio_port_pins_t *inputs, gpio_port_pins_t *outputs)
 {
+	const int offset = GPIO_RPI_PINS_PER_PORT * PORT_NO(port);
+
 	/* The Zephyr API considers a disconnected pin to be neither an input nor output.
 	 * Since we disable both OE and IE for disconnected pins clear the mask bits.
 	 */
 	for (int pin = 0; pin < NUM_BANK0_GPIOS; pin++) {
-		if (pads_bank0_hw->io[pin] & PADS_BANK0_GPIO0_OD_BITS) {
+		if (pads_bank0_hw->io[pin + offset] & PADS_BANK0_GPIO0_OD_BITS) {
 			map &= ~BIT(pin);
 		}
-		if (inputs && (pads_bank0_hw->io[pin] & PADS_BANK0_GPIO0_IE_BITS)) {
+		if (inputs && (pads_bank0_hw->io[pin + offset] & PADS_BANK0_GPIO0_IE_BITS)) {
 			*inputs |= BIT(pin);
 		}
 	}