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/*
* Copyright (c) 2021 Yonatan Schachter
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_SOC_ARM_RPI_PICO_RP2_PINCTRL_SOC_H_
#define ZEPHYR_SOC_ARM_RPI_PICO_RP2_PINCTRL_SOC_H_
#include <zephyr/dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>
/**
* @brief Type to hold a pin's pinctrl configuration.
*/
struct rpi_pinctrl_soc_pin {
/** Pin number 0..29 */
uint32_t pin_num : 5;
/** Alternative function (UART, SPI, etc.) */
uint32_t alt_func : 4;
/** Maximum current used by a pin, in mA */
uint32_t drive_strength : 4;
/** Slew rate, may be either false (slow) or true (fast) */
uint32_t slew_rate : 1;
/** Enable the internal pull up resistor */
uint32_t pullup : 1;
/** Enable the internal pull down resistor */
uint32_t pulldown : 1;
/** Enable the pin as an input */
uint32_t input_enable : 1;
/** Enable the internal schmitt trigger */
uint32_t schmitt_enable : 1;
};
typedef struct rpi_pinctrl_soc_pin pinctrl_soc_pin_t;
/**
* @brief Utility macro to initialize each pin.
*
* @param node_id Node identifier.
* @param prop Property name.
* @param idx Property entry index.
*/
#define Z_PINCTRL_STATE_PIN_INIT(node_id, prop, idx) \
{ \
RP2_GET_PIN_NUM(DT_PROP_BY_IDX(node_id, prop, idx)), \
RP2_GET_PIN_ALT_FUNC(DT_PROP_BY_IDX(node_id, prop, idx)), \
DT_ENUM_IDX(node_id, drive_strength), \
DT_ENUM_IDX(node_id, slew_rate), \
DT_PROP(node_id, bias_pull_up), \
DT_PROP(node_id, bias_pull_down), \
DT_PROP(node_id, input_enable), \
DT_PROP(node_id, input_schmitt_enable), \
},
/**
* @brief Utility macro to initialize state pins contained in a given property.
*
* @param node_id Node identifier.
* @param prop Property name describing state pins.
*/
#define Z_PINCTRL_STATE_PINS_INIT(node_id, prop) \
{DT_FOREACH_CHILD_VARGS(DT_PHANDLE(node_id, prop), \
DT_FOREACH_PROP_ELEM, pinmux, \
Z_PINCTRL_STATE_PIN_INIT)}
#define RP2_GET_PIN_NUM(pinctrl) \
(((pinctrl) >> RP2_PIN_NUM_POS) & RP2_PIN_NUM_MASK)
#define RP2_GET_PIN_ALT_FUNC(pinctrl) \
(((pinctrl) >> RP2_ALT_FUNC_POS) & RP2_ALT_FUNC_MASK)
#endif /* ZEPHYR_SOC_ARM_RPI_PICO_RP2_PINCTRL_SOC_H_ */