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drivers: clock_control: nrf: start HFXO when using LFSYNTH

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When using synthesized low frequency clock, HFXO should be running
to ensure correct frequency.

Signed-off-by: Michał Stasiak <michal.stasiak@nordicsemi.no>
This commit is contained in:
Michał Stasiak 2025-01-15 13:20:51 +01:00 • committed by Benjamin Cabé
commit 9a47667468
1 changed files with 15 additions and 0 deletions
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15
drivers/clock_control/clock_control_nrf.c
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@ -79,6 +79,10 @@ struct nrf_clock_control_config {
static atomic_t hfclk_users;
static uint64_t hf_start_tstamp;
static uint64_t hf_stop_tstamp;
#if CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH
/* Client to request HFXO to synthesize low frequency clock. */
static struct onoff_client lfsynth_cli;
#endif
static struct nrf_clock_control_sub_data *get_sub_data(const struct device *dev,
enum clock_control_nrf_type type)
@ -202,6 +206,12 @@ static void lfclk_start(void)
anomaly_132_workaround();
}
#if CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH
sys_notify_init_spinwait(&lfsynth_cli.notify);
(void)onoff_request(z_nrf_clock_control_get_onoff(CLOCK_CONTROL_NRF_SUBSYS_HF),
&lfsynth_cli);
#endif
nrfx_clock_lfclk_start();
}
@ -212,6 +222,11 @@ static void lfclk_stop(void)
}
nrfx_clock_lfclk_stop();
#if CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH
(void)onoff_cancel_or_release(z_nrf_clock_control_get_onoff(CLOCK_CONTROL_NRF_SUBSYS_HF),
&lfsynth_cli);
#endif
}
static void hfclk_start(void)