ade49f081d
Updated API version enables multi-instance GPIOTE driver. Additionally obsolete symbol that was used to specify API version in the past was removed. Affected drivers have been adjusted and appropriate changes in affected files have been made. Signed-off-by: Jakub Zymelka <jakub.zymelka@nordicsemi.no>
75 lines
2 KiB
C
75 lines
2 KiB
C
/*
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* Copyright (c) 2023, Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "spi_nrfx_common.h"
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#include <zephyr/kernel.h>
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int spi_nrfx_wake_init(const nrfx_gpiote_t *gpiote, uint32_t wake_pin)
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{
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nrf_gpio_pin_pull_t pull_config = NRF_GPIO_PIN_PULLDOWN;
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uint8_t ch;
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nrfx_gpiote_trigger_config_t trigger_config = {
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.trigger = NRFX_GPIOTE_TRIGGER_HITOLO,
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.p_in_channel = &ch,
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};
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nrfx_gpiote_input_pin_config_t input_config = {
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.p_pull_config = &pull_config,
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.p_trigger_config = &trigger_config,
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.p_handler_config = NULL,
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};
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nrfx_err_t res;
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res = nrfx_gpiote_channel_alloc(gpiote, &ch);
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if (res != NRFX_SUCCESS) {
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return -ENODEV;
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}
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res = nrfx_gpiote_input_configure(gpiote, wake_pin, &input_config);
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if (res != NRFX_SUCCESS) {
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nrfx_gpiote_channel_free(gpiote, ch);
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return -EIO;
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}
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return 0;
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}
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int spi_nrfx_wake_request(const nrfx_gpiote_t *gpiote, uint32_t wake_pin)
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{
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nrf_gpiote_event_t trigger_event = nrfx_gpiote_in_event_get(gpiote, wake_pin);
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uint32_t start_cycles;
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uint32_t max_wait_cycles =
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DIV_ROUND_UP(CONFIG_SPI_NRFX_WAKE_TIMEOUT_US *
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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC,
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1000000);
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int err = 0;
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/* Enable the trigger (a high-to-low transition) without its interrupt.
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* The expected time to wait is quite short so it is not worth paying
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* the overhead of context switching to handle the interrupt.
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*/
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nrfx_gpiote_trigger_enable(gpiote, wake_pin, false);
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/* Enable pull-up on the WAKE line. After the slave device sees the
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* WAKE line going high, it will force the line to go low. This will
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* be caught by the enabled trigger and the loop below waits for that.
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*/
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nrf_gpio_cfg_input(wake_pin, NRF_GPIO_PIN_PULLUP);
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start_cycles = k_cycle_get_32();
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while (!nrf_gpiote_event_check(gpiote->p_reg, trigger_event)) {
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uint32_t elapsed_cycles = k_cycle_get_32() - start_cycles;
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if (elapsed_cycles >= max_wait_cycles) {
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err = -ETIMEDOUT;
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break;
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}
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}
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nrfx_gpiote_trigger_disable(gpiote, wake_pin);
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nrf_gpio_cfg_input(wake_pin, NRF_GPIO_PIN_PULLDOWN);
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return err;
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}
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