Refactor eMMC/SD code to reduce duplicate code. Moved SDHCI driver into generic module that can be used by other platforms.

Author: dgarske

config/examples/polarfire_mpfs250.config

@@ -31,9 +31,9 @@ NO_ARM_ASM?=0
 # Optional: Use smaller SHA512
 #CFLAGS_EXTRA+=-DUSE_SLOW_SHA512
 
-# SDCard (default)
-# Optionally use eMMC
-#CFLAGS+=-DUSE_EMMC
+# SDCard or eMMC support via SDHCI driver
+DISK_SDCARD?=1
+DISK_EMMC?=0
 
 # DDR Address for wolfBoot to start from
 WOLFBOOT_ORIGIN?=0x80000000

docs/Targets.md

@@ -1193,8 +1193,6 @@ Benchmark complete
 
 ### PolarFire TODO
 
-* Add eMMC/SD features:
-  - eMMC support (not just SD)
 * Add support for reading serial number and modifying ethernet MAC in device tree
 * Add support for QSPI NOR flash
 * Add support for full HSS replacement using wolfboot