3e6d6033bb
Nordic SoCs implement an event system, for which the system can optimize for low latency/high power or low power. Add soc level implementation of reference counted API which will optimize for low latency if any part of the system requires it. Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>
95 lines
2 KiB
C
95 lines
2 KiB
C
/*
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* Copyright (c) 2024 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 <nrf_sys_event.h>
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#if CONFIG_SOC_SERIES_NRF54HX
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/*
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* The 54HX is not yet supported by an nrfx driver nor the system controller so
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* we implement an ISR and concurrent access safe reference counting implementation
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* here using the nrfx hal.
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*/
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#include <hal/nrf_lrcconf.h>
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static struct k_spinlock global_constlat_lock;
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static uint16_t global_constlat_count;
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int nrf_sys_event_request_global_constlat(void)
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{
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K_SPINLOCK(&global_constlat_lock) {
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if (global_constlat_count == 0) {
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#if CONFIG_SOC_NRF54H20_CPUAPP
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nrf_lrcconf_task_trigger(NRF_LRCCONF010,
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NRF_LRCCONF_TASK_CONSTLAT_ENABLE);
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#elif CONFIG_SOC_NRF54H20_CPURAD
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nrf_lrcconf_task_trigger(NRF_LRCCONF000,
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NRF_LRCCONF_TASK_CONSTLAT_ENABLE);
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nrf_lrcconf_task_trigger(NRF_LRCCONF020,
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NRF_LRCCONF_TASK_CONSTLAT_ENABLE);
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#else
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#error "unsupported"
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#endif
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}
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global_constlat_count++;
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}
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return 0;
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}
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int nrf_sys_event_release_global_constlat(void)
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{
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K_SPINLOCK(&global_constlat_lock) {
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if (global_constlat_count == 1) {
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#if CONFIG_SOC_NRF54H20_CPUAPP
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nrf_lrcconf_task_trigger(NRF_LRCCONF010,
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NRF_LRCCONF_TASK_CONSTLAT_DISABLE);
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#elif CONFIG_SOC_NRF54H20_CPURAD
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nrf_lrcconf_task_trigger(NRF_LRCCONF000,
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NRF_LRCCONF_TASK_CONSTLAT_DISABLE);
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nrf_lrcconf_task_trigger(NRF_LRCCONF020,
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NRF_LRCCONF_TASK_CONSTLAT_DISABLE);
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#else
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#error "unsupported"
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#endif
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}
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global_constlat_count--;
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}
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return 0;
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}
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#else
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/*
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* The nrfx power driver already contains an ISR and concurrent access safe reference
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* counting API so we just use it directly when available.
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*/
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#include <nrfx_power.h>
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int nrf_sys_event_request_global_constlat(void)
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{
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nrfx_err_t err;
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err = nrfx_power_constlat_mode_request();
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return (err == NRFX_SUCCESS || err == NRFX_ERROR_ALREADY) ? 0 : -EAGAIN;
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}
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int nrf_sys_event_release_global_constlat(void)
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{
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nrfx_err_t err;
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err = nrfx_power_constlat_mode_free();
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return (err == NRFX_SUCCESS || err == NRFX_ERROR_BUSY) ? 0 : -EAGAIN;
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}
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#endif
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