drivers: spi: mcux_lpspi: allow to configure data pins

Add binding properties to allow configuring the direction of data pins
SDI and SDO.

Signed-off-by: Manuel Argüelles <manuel.arguelles@nxp.com>

drivers/spi/spi_mcux_lpspi.c

@@ -33,6 +33,7 @@ struct spi_mcux_config {
 	uint32_t sck_pcs_delay;
 	uint32_t transfer_delay;
 	const struct pinctrl_dev_config *pincfg;
+	lpspi_pin_config_t data_pin_config;
 };
 
 #ifdef CONFIG_SPI_MCUX_LPSPI_DMA
@@ -212,6 +213,8 @@ static int spi_mcux_configure(const struct device *dev,
 	master_config.lastSckToPcsDelayInNanoSec = config->sck_pcs_delay;
 	master_config.betweenTransferDelayInNanoSec = config->transfer_delay;
 
+	master_config.pinCfg = config->data_pin_config;
+
 	if (!device_is_ready(config->clock_dev)) {
 		LOG_ERR("clock control device not ready");
 		return -ENODEV;
@@ -638,6 +641,7 @@ static const struct spi_driver_api spi_mcux_driver_api = {
 			DT_INST_NODE_HAS_PROP(n, transfer_delay),	\
 			DT_INST_PROP(n, transfer_delay)),		\
 		.pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n),		\
+		.data_pin_config = DT_INST_ENUM_IDX(n, data_pin_config),\
 	};								\
 									\
 	static struct spi_mcux_data spi_mcux_data_##n = {		\

dts/bindings/spi/nxp,imx-lpspi.yaml

@@ -1,4 +1,4 @@
-# Copyright (c) 2018, NXP
+# Copyright (c) 2018,2023 NXP
 # SPDX-License-Identifier: Apache-2.0
 
 description: NXP i.MX LPSPI controller
@@ -34,3 +34,15 @@ properties:
     description: |
       Delay in nanoseconds from the chip select deassert to the next chip
       select assert. If not set, the minimum supported delay is used.
+
+  data-pin-config:
+    type: string
+    enum:
+      - "sdi-in,sdo-out"
+      - "sdi-in,sdi-out"
+      - "sdo-in,sdo-out"
+      - "sdo-in,sdi-out"
+    default: "sdi-in,sdo-out"
+    description: |
+      Configures which pins (SDO and SDI) are used for input and output data
+      during single bit transfers.