[U-Boot] [RFC for-v2019.01 1/4] dm: MIGRATION: Add migration plan for DM_MMC

[Tom Rini]

Given that at this point the MMC subsystem itself has been migrated
along with a number of subsystem drivers, formalize a deadline for
migration.

Cc: Simon Glass <sjg at chromium.org>
Cc: Jaehoon Chung <jh80.chung at samsung.com>
Signed-off-by: Tom Rini <trini at konsulko.com>
---
 Makefile                       | 7 +++++++
 doc/driver-model/MIGRATION.txt | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/Makefile b/Makefile
index aeb1c1455b9d..7005d76ad4d8 100644
--- a/Makefile
+++ b/Makefile
@@ -918,6 +918,13 @@ ifeq ($(CONFIG_DM_I2C_COMPAT)$(CONFIG_SANDBOX),y)
 	@echo "before sending patches to the mailing list."
 	@echo "===================================================="
 endif
+ifneq ($(CONFIG_DM_MMC)$(CONFIG_OF_CONTROL)$(CONFIG_BLK),yyy)
+	@echo "===================== WARNING ======================"
+	@echo "This board does not use CONFIG_DM_MMC. Please update"
+	@echo "the board to use CONFIG_DM_MMC before the v2019.04 release."
+	@echo "See doc/driver-model/MIGRATION.txt for more info."
+	@echo "===================================================="
+endif
 	@# Check that this build does not use CONFIG options that we do not
 	@# know about unless they are in Kconfig. All the existing CONFIG
 	@# options are whitelisted, so new ones should not be added.
diff --git a/doc/driver-model/MIGRATION.txt b/doc/driver-model/MIGRATION.txt
index 5ebefd608b99..71c26571828a 100644
--- a/doc/driver-model/MIGRATION.txt
+++ b/doc/driver-model/MIGRATION.txt
@@ -5,6 +5,15 @@ U-Boot has been migrating to a new driver model since its introduction in
 2014. This file describes the schedule for deprecation of pre-driver-model
 features.
 
+CONFIG_DM_MMC
+-------------
+
+Status: In progress
+Deadline: 2019.04
+
+The subsystem itself has been converted and maintainers should submit patches
+switching over to using CONFIG_DM_MMC and other base driver model options in
+time for inclusion in the 2019.04 rerelease.
 
 CONFIG_BLK
 ----------
-- 
2.7.4