drivers: spi: nxp_lpspi: Use spi_config timing params

Use the timing params from spi_config that are specific to the slave
instead of using the same timing for the controller for all slaves.
Remove these properties from the LPSPI DT binding.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

drivers/spi/spi_nxp_lpspi/spi_nxp_lpspi_common.c

@@ -158,16 +158,32 @@ static uint8_t lpspi_calc_delay_scaler(uint32_t desired_delay_ns,
 }
 
 /* returns CCR mask of the bits 8-31 */
-static inline uint32_t lpspi_set_delays(const struct device *dev, uint32_t prescaled_clock)
+static inline uint32_t lpspi_set_delays(const struct device *dev,
+					const struct spi_config *spi_cfg,
+					uint32_t prescaled_clock)
 {
 	const struct lpspi_config *config = dev->config;
+	uint32_t val = 0;
+
+	if (!spi_cs_is_gpio(spi_cfg)) {
+		uint32_t lead_time_ns = config->pcs_sck_delay > 0 ?
+					config->pcs_sck_delay : spi_cfg->cs.setup_ns;
+		uint32_t lag_time_ns = config->sck_pcs_delay > 0 ?
+					config->sck_pcs_delay : spi_cfg->cs.hold_ns;
+
+		val |= LPSPI_CCR_PCSSCK(lpspi_calc_delay_scaler(lead_time_ns,
+								prescaled_clock, 1)) |
+		       LPSPI_CCR_SCKPCS(lpspi_calc_delay_scaler(lag_time_ns,
+								prescaled_clock, 1));
+	}
+
+	uint16_t word_delay = config->transfer_delay > 0 ?
+				(uint16_t)(config->transfer_delay & 0xFFFF) :
+				spi_get_word_delay(spi_cfg);
+
+	val |= LPSPI_CCR_DBT(lpspi_calc_delay_scaler(word_delay, prescaled_clock, 2));
 
-	return LPSPI_CCR_PCSSCK(lpspi_calc_delay_scaler(config->pcs_sck_delay,
-							prescaled_clock, 1)) |
-	       LPSPI_CCR_SCKPCS(lpspi_calc_delay_scaler(config->sck_pcs_delay,
-							prescaled_clock, 1)) |
-	       LPSPI_CCR_DBT(lpspi_calc_delay_scaler(config->transfer_delay,
-							prescaled_clock, 2));
+	return val;
 }
 
 /* This is the equation for the sck frequency given a div and prescaler. */
@@ -324,7 +340,7 @@ int lpspi_configure(const struct device *dev, const struct spi_config *spi_cfg)
 
 		/* sckdiv algorithm must run *before* delays are set in order to know prescaler */
 		ccr |= lpspi_set_sckdiv(spi_cfg->frequency, clock_freq, &prescaler);
-		ccr |= lpspi_set_delays(dev, clock_freq / TWO_EXP(prescaler));
+		ccr |= lpspi_set_delays(dev, spi_cfg, clock_freq / TWO_EXP(prescaler));
 
 		/* note that not all bits of the register are readable on some platform,
 		 * that's why we update it on one write