spi_mcux_lpspi: revert old driver

Revert the old MCUX LPSPI driver to its original location to allow users
to choose which implementation to use. The new driver remains under
development and has shown instability and functional issues in
some configurations. Providing the previous version ensures a stable
and reliable option for users who prefer or require it.
The restored driver was taken from commit
<42511c80bacee5f072fc64b0c9d6dc068005e31b>
(before it was moved to the new location).

Signed-off-by: Isaev Denis <[email protected]>

Author: AnElderlyFox

drivers/clock_control/clock_control_mcux_ccm.c

@@ -25,7 +25,7 @@ LOG_MODULE_REGISTER(clock_control);
 static sc_ipc_t ipc_handle;
 #endif
 
-#ifdef CONFIG_SPI_NXP_LPSPI
+#if defined(CONFIG_SPI_NXP_LPSPI) || defined(CONFIG_SPI_MCUX_LPSPI)
 static const clock_name_t lpspi_clocks[] = {
 	kCLOCK_Usb1PllPfd1Clk,
 	kCLOCK_Usb1PllPfd0Clk,
@@ -270,7 +270,7 @@ static int mcux_ccm_get_subsys_rate(const struct device *dev,
 		break;
 #endif
 
-#ifdef CONFIG_SPI_NXP_LPSPI
+#if defined(CONFIG_SPI_NXP_LPSPI) || defined(CONFIG_SPI_MCUX_LPSPI)
 	case IMX_CCM_LPSPI_CLK:
 	{
 		uint32_t lpspi_mux = CLOCK_GetMux(kCLOCK_LpspiMux);

drivers/clock_control/clock_control_mcux_ccm_rev2.c

@@ -81,7 +81,7 @@ static int mcux_ccm_get_subsys_rate(const struct device *dev,
 		break;
 #endif
 
-#ifdef CONFIG_SPI_NXP_LPSPI
+#if defined(CONFIG_SPI_NXP_LPSPI) || defined(CONFIG_SPI_MCUX_LPSPI)
 #if defined(CONFIG_SOC_SERIES_IMXRT118X)
 	case IMX_CCM_LPSPI0102_CLK:
 		clock_root = kCLOCK_Root_Lpspi0102 + instance;
@@ -91,7 +91,7 @@ static int mcux_ccm_get_subsys_rate(const struct device *dev,
 		clock_root = kCLOCK_Root_Lpspi1 + instance;
 		break;
 #endif /* CONFIG_SOC_SERIES_IMXRT118X */
-#endif /* CONFIG_SPI_NXP_LPSPI */
+#endif /* CONFIG_SPI_NXP_LPSPI || CONFIG_SPI_MCUX_LPSPI */
 
 #ifdef CONFIG_UART_MCUX_LPUART
 #if defined(CONFIG_SOC_SERIES_IMXRT118X)

drivers/clock_control/clock_control_mcux_syscon.c

@@ -603,14 +603,14 @@ static int mcux_lpc_syscon_clock_control_get_subsys_rate(const struct device *de
 		break;
 #endif /* defined(CONFIG_DT_HAS_NXP_XSPI_ENABLED) */
 
-#if (defined(CONFIG_SPI_NXP_LPSPI) && CONFIG_SOC_FAMILY_MCXA)
+#if ((defined(CONFIG_SPI_NXP_LPSPI) || defined(CONFIG_SPI_MCUX_LPSPI)) && CONFIG_SOC_FAMILY_MCXA)
 	case MCUX_LPSPI0_CLK:
 		*rate = CLOCK_GetLpspiClkFreq(0);
 		break;
 	case MCUX_LPSPI1_CLK:
 		*rate = CLOCK_GetLpspiClkFreq(1);
 		break;
-#endif /* defined(CONFIG_SPI_NXP_LPSPI) */
+#endif /* defined(CONFIG_SPI_NXP_LPSPI) || defined(CONFIG_SPI_MCUX_LPSPI) */
 	}
 
 	return 0;

drivers/spi/CMakeLists.txt

@@ -39,6 +39,7 @@ zephyr_library_sources_ifdef(CONFIG_SPI_MCUX_DSPI spi_mcux_dspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MCUX_ECSPI spi_mcux_ecspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MCUX_FLEXCOMM spi_mcux_flexcomm.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MCUX_FLEXIO spi_mcux_flexio.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_MCUX_LPSPI spi_mcux_lpspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MEC5_QSPI spi_mchp_mec5_qspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_NPCX_SPIP spi_npcx_spip.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_NRFX_SPI spi_nrfx_spi.c spi_nrfx_common.c)

drivers/spi/Kconfig

@@ -118,6 +118,7 @@ source "drivers/spi/Kconfig.mcux_dspi"
 source "drivers/spi/Kconfig.mcux_ecspi"
 source "drivers/spi/Kconfig.mcux_flexcomm"
 source "drivers/spi/Kconfig.mcux_flexio"
+source "drivers/spi/Kconfig.mcux_lpspi"
 source "drivers/spi/Kconfig.mec5"
 source "drivers/spi/Kconfig.npcx"
 source "drivers/spi/Kconfig.nrfx"

drivers/spi/Kconfig.mcux_lpspi

@@ -0,0 +1,36 @@
+# MCUXpresso SDK SPI
+
+# Copyright (c) 2018, NXP
+# SPDX-License-Identifier: Apache-2.0
+
+config SPI_MCUX_LPSPI
+	bool "MCUX LPSPI driver"
+	default y
+	depends on DT_HAS_NXP_LPSPI_ENABLED
+	depends on CLOCK_CONTROL
+	select PINCTRL
+	help
+	  Enable support for MCUX LPSPI driver.
+
+if SPI_MCUX_LPSPI
+config SPI_MCUX_LPSPI_DMA
+	bool "MCUX LPSPI SPI DMA Support"
+	select DMA
+	help
+	  Enable the SPI DMA mode for SPI instances
+	  that enable dma channels in their device tree node.
+
+if SPI_RTIO
+config SPI_MCUX_RTIO_SQ_SIZE
+	int "number of available submission queue entries"
+	default 8 # sensible default that covers most common spi transactions
+	help
+	  when rtio is use with spi each driver holds a context with which blocking
+	  api calls use to perform spi transactions. this queue needs to be as deep
+	  as the longest set of spi_buf_sets used, where normal spi operations are
+	  used (equal length buffers). it may need to be slightly deeper where the
+	  spi buffer sets for transmit/receive are not always matched equally in
+	  length as these are transformed into normal transceives.
+endif # SPI_RTIO
+
+endif # SPI_MCUX_LPSPI