drivers: sdhc: litex: add liteadcard driver

add litex litesdcard driver.

Signed-off-by: Fin Maaß <[email protected]>

Author: maass-hamburg

drivers/sdhc/CMakeLists.txt

@@ -14,6 +14,7 @@ zephyr_library_sources_ifdef(CONFIG_SDHC_INFINEON_CAT1 ifx_cat1_sdio.c)
 zephyr_library_sources_ifdef(CONFIG_CDNS_SDHC sdhc_cdns_ll.c sdhc_cdns.c)
 zephyr_library_sources_ifdef(CONFIG_SDHC_ESP32 sdhc_esp32.c)
 zephyr_library_sources_ifdef(CONFIG_SDHC_RENESAS_RA sdhc_renesas_ra.c)
+zephyr_library_sources_ifdef(CONFIG_SDHC_LITEX_LITESDCARD sdhc_litex_litesdcard.c)
 zephyr_library_sources_ifdef(CONFIG_SDHC_MAX32 sdhc_max32.c)
 zephyr_library_sources_ifdef(CONFIG_SDHC_AMBIQ sdhc_ambiq.c)
 zephyr_library_sources_ifdef(CONFIG_XLNX_SDHC xlnx_sdhc.c)

drivers/sdhc/Kconfig

@@ -19,6 +19,7 @@ source "drivers/sdhc/Kconfig.intel"
 source "drivers/sdhc/Kconfig.sdhc_cdns"
 source "drivers/sdhc/Kconfig.esp32"
 source "drivers/sdhc/Kconfig.renesas_ra"
+source "drivers/sdhc/Kconfig.litex"
 source "drivers/sdhc/Kconfig.max32"
 source "drivers/sdhc/Kconfig.ambiq"
 source "drivers/sdhc/Kconfig.xlnx"

drivers/sdhc/Kconfig.litex

@@ -0,0 +1,26 @@
+# Copyright The Zephyr Project Contributors
+# SPDX-License-Identifier: Apache-2.0
+
+config SDHC_LITEX_LITESDCARD
+	bool "LiteX LiteSDCard SDHC driver"
+	default y
+	depends on DT_HAS_LITEX_LITESDCARD_SDHC_ENABLED
+	select SDHC_SUPPORTS_NATIVE_MODE
+	help
+	  sdhc driver for LiteX LiteSDCard.
+
+if SDHC_LITEX_LITESDCARD
+
+configdefault SDHC_BUFFER_ALIGNMENT
+	default 4
+
+config SDHC_LITEX_LITESDCARD_NO_COHERENT_DMA
+	bool "No coherent DMA bus, need cache management"
+	select CACHE_MANAGEMENT
+	depends on DCACHE
+	help
+	  This needs to be enabled if the LiteSDCard Module is not connected
+	  to a coherent DMA bus, meaning that the cache needs to be managed
+	  before and after DMA operations.
+
+endif # SDHC_LITEX_LITESDCARD