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modules: hal_nordic: nrf_802154: enable constant latency

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To ensure that the accesses to the radio peripheral are done with
predictable timings, the constant latency must be enabled.
The constant latency mode is enabled alongside the HFXO.

Signed-off-by: Rafał Kuźnia <rafal.kuznia@nordicsemi.no>
This commit is contained in:
Rafał Kuźnia 2025-02-14 12:30:17 +01:00 • committed by Carles Cufí
commit 442d9383df
2 changed files with 21 additions and 0 deletions
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7
modules/hal_nordic/Kconfig
View file

@ -36,6 +36,13 @@ menuconfig NRF_802154_RADIO_DRIVER
if NRF_802154_RADIO_DRIVER
config NRF_802154_CONSTLAT_CONTROL
def_bool y
depends on SOC_SERIES_NRF54LX && NRF_802154_SL_OPENSOURCE
select NRF_SYS_EVENT
help
Allows the nRF 802.15.4 radio driver to manage the constant latency state.
config NRF_802154_MULTIPROTOCOL_SUPPORT
bool
help

14
modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c
View file

@ -12,6 +12,7 @@
#include <compiler_abstraction.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/clock_control/nrf_clock_control.h>
#include <nrf_sys_event.h>
static bool hfclk_is_running;
@ -52,6 +53,14 @@ void nrf_802154_clock_hfclk_start(void)
sys_notify_init_callback(&hfclk_cli.notify, hfclk_on_callback);
/*
* todo: replace constlat request with PM policy API when
* controlling the event latency becomes possible.
*/
if (IS_ENABLED(CONFIG_NRF_802154_CONSTLAT_CONTROL)) {
nrf_sys_event_request_global_constlat();
}
int ret = onoff_request(mgr, &hfclk_cli);
__ASSERT_NO_MSG(ret >= 0);
(void)ret;
@ -67,6 +76,11 @@ void nrf_802154_clock_hfclk_stop(void)
int ret = onoff_cancel_or_release(mgr, &hfclk_cli);
__ASSERT_NO_MSG(ret >= 0);
(void)ret;
if (IS_ENABLED(CONFIG_NRF_802154_CONSTLAT_CONTROL)) {
nrf_sys_event_release_global_constlat();
}
hfclk_is_running = false;
}