[PATCH v3] dm: i2c: Add a migration method for I2C

[Simon Glass]

This probably should have been done a while back since it is a core
system. Add a migration deadline of later this year, to catch the
stragglers.

Signed-off-by: Simon Glass <sjg at chromium.org>

---

Changes in v3:
- s/'network'/I2C/ again

Changes in v2:
- s/'network'/I2C/

 Makefile                       | 11 +++++++++++
 doc/driver-model/migration.rst |  8 ++++++++
 2 files changed, 19 insertions(+)

diff --git a/Makefile b/Makefile
index b72d8d20c08..f60c7901a5b 100644
--- a/Makefile
+++ b/Makefile
@@ -1152,6 +1152,17 @@ ifneq ($(CONFIG_SPL_FIT_GENERATOR),)
 	@echo >&2 "to binman instead, to avoid the proliferation of"
 	@echo >&2 "arch-specific scripts with no tests."
 	@echo >&2 "===================================================="
+endif
+ifneq ($(CONFIG_NET),)
+ifneq ($(CONFIG_DM_ETH),y)
+	@echo >&2 "===================== WARNING ======================"
+	@echo >&2 "This board does not use CONFIG_DM_I2C (Driver Model"
+	@echo >&2 "for I2C drivers). Please update the board to use"
+	@echo >&2 "CONFIG_DM_I2C before the v2021.10 release. Failure to"
+	@echo >&2 "update by the deadline may result in board removal."
+	@echo >&2 "See doc/driver-model/migration.rst for more info."
+	@echo >&2 "===================================================="
+endif
 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
diff --git a/doc/driver-model/migration.rst b/doc/driver-model/migration.rst
index 2284e8a6f70..8d0bb7635b5 100644
--- a/doc/driver-model/migration.rst
+++ b/doc/driver-model/migration.rst
@@ -99,3 +99,11 @@ Deadline: 2020.07
 The network subsystem has supported the driver model since early 2015.
 Maintainers should submit patches switching over to using CONFIG_DM_ETH and
 other base driver model options in time for inclusion in the 2020.07 release.
+
+CONFIG_DM_I2C
+-------------
+Deadline: 2021.10
+
+The I2C subsystem has supported the driver model since early 2015.
+Maintainers should submit patches switching over to using CONFIG_DM_I2C and
+other base driver model options in time for inclusion in the 2021.10 release.
-- 
2.31.0.291.g576ba9dcdaf-goog