drivers: sdhc: add SD host controller driver for LPC SDIF

add SD host controller driver for LPC SDIF IP block, using NXP SDIF
HAL driver.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

drivers/clock_control/clock_control_mcux_syscon.c

@@ -113,6 +113,14 @@ static int mcux_lpc_syscon_clock_control_get_subsys_rate(
 		break;
 #endif
 
+#if (defined(FSL_FEATURE_SOC_SDIF_COUNT) && \
+	(FSL_FEATURE_SOC_SDIF_COUNT)) && \
+	CONFIG_MCUX_SDIF
+	case MCUX_SDIF_CLK:
+		*rate = CLOCK_GetSdioClkFreq();
+		break;
+#endif
+
 #if defined(CONFIG_CAN_MCUX_MCAN)
 	case MCUX_MCAN_CLK:
 		*rate = CLOCK_GetMCanClkFreq();

drivers/sdhc/CMakeLists.txt

@@ -5,4 +5,5 @@ if (CONFIG_SDHC)
 zephyr_library()
 zephyr_library_sources_ifdef(CONFIG_IMX_USDHC imx_usdhc.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_SDHC sdhc_spi.c)
+zephyr_library_sources_ifdef(CONFIG_MCUX_SDIF mcux_sdif.c)
 endif()

drivers/sdhc/Kconfig

@@ -10,6 +10,7 @@ if SDHC
 
 source "drivers/sdhc/Kconfig.imx"
 source "drivers/sdhc/Kconfig.spi"
+source "drivers/sdhc/Kconfig.mcux_sdif"
 
 config SDHC_INIT_PRIORITY
 	int "SDHC driver init priority"

drivers/sdhc/Kconfig.mcux_sdif

@@ -0,0 +1,35 @@
+# Copyright 2022, NXP
+# SPDX -License-Identifier: Apache-2.0
+
+config MCUX_SDIF
+	bool "NXP MCUX SDIF Driver"
+	default y
+	depends on DT_HAS_NXP_LPC_SDIF_ENABLED
+	select SDHC_SUPPORTS_NATIVE_MODE
+	help
+	  Enable the NXP SDIF Host controller driver
+
+if MCUX_SDIF
+
+config MCUX_SDIF_DMA_SUPPORT
+	bool "DMA support for MCUX SDIF driver"
+	default y
+	help
+	  Enable DMA support for MCUX SDIF driver. May be disabled to reduce
+	  footprint of driver.
+
+if MCUX_SDIF_DMA_SUPPORT
+
+# SDIF DMA needs 32 bit aligned buffers
+config SDHC_BUFFER_ALIGNMENT
+	default 4
+
+config MCUX_SDIF_DMA_BUFFER_SIZE
+	int "Size of DMA descriptor buffer in bytes"
+	default 256
+	help
+	  Size of MCUX SDIF DMA descriptor buffer in bytes
+
+endif #MCUX_SDIF_DMA_SUPPORT
+
+endif #MCUX_SDIF