doc: driver-model: Convert MIGRATION.txt to reST

Convert plain text documentation to reStructuredText format and add
it to Sphinx TOC tree. No essential content change.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 99 insertions, 0 deletions

diff --git a/doc/driver-model/migration.rst b/doc/driver-model/migration.rst
new file mode 100644
index 0000000000..a26e7ab7e1
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+.. SPDX-License-Identifier: GPL-2.0+
+
+Migration Schedule
+==================
+
+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_DM_USB
+-------------
+
+* Status: In progress
+* Deadline: 2019.07
+
+The subsystem itself has been converted along with many of the host controller
+and maintainers should submit patches switching over to using CONFIG_DM_USB and
+other base driver model options in time for inclusion in the 2019.07 rerelease.
+
+CONFIG_SATA
+-----------
+
+* Status: In progress
+* Deadline: 2019.07
+
+The subsystem itself has been converted along with many of the host controller
+and maintainers should submit patches switching over to using CONFIG_AHCI and
+other base driver model options in time for inclusion in the 2019.07 rerelease.
+
+CONFIG_BLK
+----------
+
+* Status: In progress
+* Deadline: 2019.07
+
+In concert with maintainers migrating their block device usage to the
+appropriate DM driver, CONFIG_BLK needs to be set as well.  The final deadline
+here coincides with the final deadline for migration of the various block
+subsystems.  At this point we will be able to audit and correct the logic in
+Kconfig around using CONFIG_PARTITIONS and CONFIG_HAVE_BLOCK_DEVICE and make
+use of CONFIG_BLK / CONFIG_SPL_BLK as needed.
+
+CONFIG_DM_SPI / CONFIG_DM_SPI_FLASH
+-----------------------------------
+
+Board Maintainers should submit the patches for enabling DM_SPI and DM_SPI_FLASH
+to move the migration with in the deadline.
+
+No dm conversion yet::
+
+	drivers/spi/cf_spi.c
+	drivers/spi/fsl_espi.c
+	drivers/spi/lpc32xx_ssp.c
+	drivers/spi/mxs_spi.c
+	drivers/spi/sh_spi.c
+	drivers/spi/soft_spi_legacy.c
+
+* Status: In progress
+* Deadline: 2019.04
+
+Partially converted::
+
+	drivers/spi/davinci_spi.c
+	drivers/spi/fsl_dspi.c
+	drivers/spi/kirkwood_spi.c
+	drivers/spi/mxc_spi.c
+	drivers/spi/omap3_spi.c
+	drivers/spi/sh_qspi.c
+
+* Status: In progress
+* Deadline: 2019.07
+
+
+CONFIG_DM_PCI
+-------------
+Deadline: 2019.07
+
+The PCI subsystem has supported driver model since mid 2015. Maintainers should
+submit patches switching over to using CONFIG_DM_PCI and other base driver
+model options in time for inclusion in the 2019.07 release.
+
+
+CONFIG_DM_VIDEO
+---------------
+Deadline: 2019.07
+
+The video subsystem has supported driver model since early 2016. Maintainers
+should submit patches switching over to using CONFIG_DM_VIDEO and other base
+driver model options in time for inclusion in the 2019.07 release.