Commit 41ef8c3c authored by Peter van der Perk's avatar Peter van der Perk Committed by Dan Kalowsky
Browse files

drivers: spi_nxp_lpspi: Don't fetch clockrate from api during configure 



The clock get rate api can be slow in certain targets and thus slowing
each SPI transaction. Instead on startup fetch the clock rate and store
this in ram. Then each spi configure action is simply reading that
variable

Signed-off-by: default avatarPeter van der Perk <peter.vanderperk@nxp.com>
parent ee1468b6

drivers/spi/spi_nxp_lpspi/spi_nxp_lpspi_common.c

+6 −5
Original line number Diff line number Diff line
@@ -260,7 +260,6 @@ static void lpspi_basic_config(const struct device *dev, const struct spi_config 


int lpspi_configure(const struct device *dev, const struct spi_config *spi_cfg)

{

	const struct lpspi_config *config = dev->config;

	struct lpspi_data *data = dev->data;

	struct spi_context *ctx = &data->ctx;

	bool already_configured = spi_context_configured(ctx, spi_cfg);
@@ -306,10 +305,7 @@ int lpspi_configure(const struct device *dev, const struct spi_config *spi_cfg) 


	lpspi_basic_config(dev, spi_cfg);



	ret = clock_control_get_rate(config->clock_dev, config->clock_subsys, &clock_freq);

	if (ret) {

		return ret;

	}

	clock_freq = data->clock_freq;



	if (SPI_OP_MODE_GET(spi_cfg->operation) == SPI_OP_MODE_MASTER) {

		uint32_t ccr = 0;
@@ -374,6 +370,11 @@ int spi_nxp_init_common(const struct device *dev) 
		return err;

	}



	err = clock_control_get_rate(config->clock_dev, config->clock_subsys, &data->clock_freq);

	if (err) {

		return err;

	}



	/* Full software reset */

	base->CR |= LPSPI_CR_RST_MASK;

	base->CR |= LPSPI_CR_RRF_MASK | LPSPI_CR_RTF_MASK;

drivers/spi/spi_nxp_lpspi/spi_nxp_lpspi_priv.h

+1 −0
Original line number Diff line number Diff line
@@ -51,6 +51,7 @@ struct lpspi_data { 
	void *driver_data;

	size_t transfer_len;

	uint8_t major_version;

	uint32_t clock_freq;

};



/* Verifies spi_cfg validity and set up configuration of hardware for xfer

CRA Git | Maintained and supported by SUSTech CRA and CCSE