drivers: wifi: Wait for clock divider to take effect (eea8f67b) · Commits · Wenxi XU / zephyr

drivers/wifi/nrfwifi/src/qspi/src/qspi_if.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -119,6 +119,14 @@ BUILD_ASSERT(QSPI_IF_DEVICE_FREQUENCY >= (NRF_QSPI_BASE_CLOCK_FREQ / 16),
		#error "Unsupported base clock divider for wake-up frequency."
		#endif

		/* After the base clock divider is changed, some time is needed for the new
		* setting to take effect. This value specifies the delay (in microseconds)
		* to be applied to ensure that the clock is ready when the QSPI operation
		* starts. It was measured with a logic analyzer (unfortunately, the nRF5340
		* specification does not provide any numbers in this regard).
		*/
		#define BASE_CLOCK_SWITCH_DELAY_US 7

		#else
		/*
		* On nRF52 Series SoCs, the base clock divider is not configurable,
		@@ -374,6 +382,7 @@ static inline void qspi_lock(const struct device *dev)
		*/
		#if defined(CONFIG_SOC_SERIES_NRF53X)
		nrf_clock_hfclk192m_div_set(NRF_CLOCK, BASE_CLOCK_DIV);
		k_busy_wait(BASE_CLOCK_SWITCH_DELAY_US);
		#endif
		}

		@@ -383,6 +392,7 @@ static inline void qspi_unlock(const struct device *dev)
		/* Restore the default base clock divider to reduce power consumption.
		*/
		nrf_clock_hfclk192m_div_set(NRF_CLOCK, NRF_CLOCK_HFCLK_DIV_4);
		k_busy_wait(BASE_CLOCK_SWITCH_DELAY_US);
		#endif

		#ifdef CONFIG_MULTITHREADING
		@@ -673,6 +683,7 @@ static inline void qspi_fill_init_struct(nrfx_qspi_config_t *initstruct)

		/* Configure physical interface */
		initstruct->phy_if.sck_freq = INST_0_SCK_CFG;

		/* Using MHZ fails checkpatch constant check */
		if (QSPI_IF_DEVICE_FREQUENCY >= 16000000) {
		qspi_cfg->qspi_slave_latency = 1;
		@@ -708,6 +719,7 @@ static int qspi_nrfx_configure(const struct device *dev)
		* divider.
		*/
		nrf_clock_hfclk192m_div_set(NRF_CLOCK, BASE_CLOCK_DIV);
		k_busy_wait(BASE_CLOCK_SWITCH_DELAY_US);
		#endif

		nrfx_err_t res = _nrfx_qspi_init(&QSPIconfig, qspi_handler, dev_data);
		@@ -715,6 +727,7 @@ static int qspi_nrfx_configure(const struct device *dev)
		#if defined(CONFIG_SOC_SERIES_NRF53X)
		/* Restore the default /4 divider after the QSPI initialization. */
		nrf_clock_hfclk192m_div_set(NRF_CLOCK, NRF_CLOCK_HFCLK_DIV_4);
		k_busy_wait(BASE_CLOCK_SWITCH_DELAY_US);
		#endif

		int ret = qspi_get_zephyr_ret_code(res);

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