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https://github.com/zephyrproject-rtos/zephyr
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eb351436ad
This change adds the device tree property for specifying oe-override (output-enable override behavior), as well as defines for possible values of the property. RP2040 GPIOs can be configured to automatically invert the output-enable signal from the selected peripheral function. This is useful for tasks like writing efficient PIO code, such as in the i2c example in the rp2040 datasheet. Signed-off-by: Yiding Jia <yiding.jia@gmail.com>
36 lines
932 B
C
36 lines
932 B
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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#include <zephyr/drivers/pinctrl.h>
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/* pico-sdk includes */
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#include <hardware/gpio.h>
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static void pinctrl_configure_pin(const pinctrl_soc_pin_t *pin)
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{
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gpio_init(pin->pin_num);
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gpio_set_function(pin->pin_num, pin->alt_func);
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gpio_set_pulls(pin->pin_num, pin->pullup, pin->pulldown);
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gpio_set_drive_strength(pin->pin_num, pin->drive_strength);
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gpio_set_slew_rate(pin->pin_num, (pin->slew_rate ?
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GPIO_SLEW_RATE_FAST : GPIO_SLEW_RATE_SLOW));
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gpio_set_input_hysteresis_enabled(pin->pin_num, pin->schmitt_enable);
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gpio_set_input_enabled(pin->pin_num, pin->input_enable);
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gpio_set_oeover(pin->pin_num, pin->oe_override);
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}
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int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
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uintptr_t reg)
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{
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ARG_UNUSED(reg);
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for (uint8_t i = 0U; i < pin_cnt; i++) {
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pinctrl_configure_pin(pins++);
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}
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return 0;
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}
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