75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*
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* Copyright (c) 2021 Yonatan Schachter
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_SOC_ARM_RPI_PICO_RP2_PINCTRL_SOC_H_
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#define ZEPHYR_SOC_ARM_RPI_PICO_RP2_PINCTRL_SOC_H_
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#include <zephyr/dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>
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/**
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* @brief Type to hold a pin's pinctrl configuration.
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*/
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struct rpi_pinctrl_soc_pin {
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/** Pin number 0..29 */
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uint32_t pin_num : 5;
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/** Alternative function (UART, SPI, etc.) */
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uint32_t alt_func : 4;
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/** Maximum current used by a pin, in mA */
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uint32_t drive_strength : 4;
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/** Slew rate, may be either false (slow) or true (fast) */
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uint32_t slew_rate : 1;
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/** Enable the internal pull up resistor */
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uint32_t pullup : 1;
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/** Enable the internal pull down resistor */
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uint32_t pulldown : 1;
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/** Enable the pin as an input */
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uint32_t input_enable : 1;
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/** Enable the internal schmitt trigger */
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uint32_t schmitt_enable : 1;
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/** Output-enable override */
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uint32_t oe_override : 2;
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};
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typedef struct rpi_pinctrl_soc_pin pinctrl_soc_pin_t;
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/**
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* @brief Utility macro to initialize each pin.
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*
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* @param node_id Node identifier.
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* @param prop Property name.
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* @param idx Property entry index.
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*/
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#define Z_PINCTRL_STATE_PIN_INIT(node_id, prop, idx) \
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{ \
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RP2_GET_PIN_NUM(DT_PROP_BY_IDX(node_id, prop, idx)), \
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RP2_GET_PIN_ALT_FUNC(DT_PROP_BY_IDX(node_id, prop, idx)), \
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DT_ENUM_IDX(node_id, drive_strength), \
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DT_ENUM_IDX(node_id, slew_rate), \
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DT_PROP(node_id, bias_pull_up), \
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DT_PROP(node_id, bias_pull_down), \
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DT_PROP(node_id, input_enable), \
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DT_PROP(node_id, input_schmitt_enable), \
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DT_PROP(node_id, raspberrypi_oe_override), \
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},
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/**
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* @brief Utility macro to initialize state pins contained in a given property.
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*
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* @param node_id Node identifier.
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* @param prop Property name describing state pins.
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*/
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#define Z_PINCTRL_STATE_PINS_INIT(node_id, prop) \
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{DT_FOREACH_CHILD_VARGS(DT_PHANDLE(node_id, prop), \
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DT_FOREACH_PROP_ELEM, pinmux, \
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Z_PINCTRL_STATE_PIN_INIT)}
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#define RP2_GET_PIN_NUM(pinctrl) \
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(((pinctrl) >> RP2_PIN_NUM_POS) & RP2_PIN_NUM_MASK)
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#define RP2_GET_PIN_ALT_FUNC(pinctrl) \
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(((pinctrl) >> RP2_ALT_FUNC_POS) & RP2_ALT_FUNC_MASK)
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#endif /* ZEPHYR_SOC_ARM_RPI_PICO_RP2_PINCTRL_SOC_H_ */
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