[U-Boot] [PATCH v3 0/14] dm: Implement driver model support in SPL

[Simon Glass]

Now that driver model operations prior to relocation, the remaining
area where it does not work is SPL. This series enables this.

Since SPL is quite memory-constrained, code and data size need to be
kept as small as possible. This series includes a few changes to help
with this:

- Small and simple malloc() implementation
- Dropping device removal features
- Dropping stdio features
- Dropping driver model warnings

With these the code size impact of driver model is small, around 2-3KB.
Data usage is typically 200-300 bytes. In many cases this can squeeze
into the available SPL RAM space.

This requires a revert of the SPL global_data revert (commit 1ee30ae).
I believe that is planned for early in this merge window. We need that
revert undone to be able to support the simple malloc in SPL on ARM.

Note that the driver model docs will be added/moved to Kconfig in a
follow-on patch.

This series is available at u-boot-dm branch 'spl-working'.

Changes in v3:
- Add new patch to avoid using arch-specific memcpy() in SPL
- Add #ifdef around serial_stub_puts() to fix error when building SPL
- Rebase to master

Changes in v2:
- Correct the Makefile condition for simple_malloc
- Rebase on top of the SPI series
- Rebase to master

Simon Glass (14):
  arm: spl: Avoid setting up a duplicate global data structure
  dm: tegra: Avoid using arch-specific memcpy() in SPL
  dm: Split the simple malloc() implementation into its own file
  dm: arm: spl: Allow simple malloc() in SPL
  dm: spl: Make simple malloc() available when enabled
  dm: spl: Allow driver model to be used
  dm: Allow device removal features to be dropped
  dm: Allow stdio registration to be dropped
  dm: Disable dm_warn() in SPL
  dm: tegra: Add platform data for the SPL uart
  dm: tegra: Add platform data for the GPIO driver
  dm: arm: spl: Make driver model linker lists available
  dm: tegra: Enable driver model in SPL and adjust the GPIO driver
  dm: Update documentation to include CONFIG_DM... options

 README                            | 119 ++++++++++++++++++++++++
 arch/arm/cpu/u-boot-spl.lds       |   7 ++
 arch/arm/lib/crt0.S               |   2 +-
 arch/arm/lib/spl.c                |   4 -
 board/nvidia/common/board.c       |   8 ++
 board/nvidia/seaboard/seaboard.c  |   4 +-
 common/Makefile                   |   3 +
 common/board_r.c                  |   3 +-
 common/dlmalloc.c                 |  19 +---
 common/malloc_simple.c            |  39 ++++++++
 common/spl/spl.c                  |  16 +++-
 doc/driver-model/README.txt       |  44 +++++++--
 drivers/core/Makefile             |   3 +-
 drivers/core/device-remove.c      | 187 ++++++++++++++++++++++++++++++++++++++
 drivers/core/device.c             | 168 ----------------------------------
 drivers/gpio/Makefile             |   4 +
 drivers/gpio/tegra_gpio.c         |  27 +++---
 drivers/serial/serial-uclass.c    |  10 +-
 drivers/serial/serial_tegra.c     |  16 ++++
 include/asm-generic/global_data.h |   1 +
 include/config_defaults.h         |   6 ++
 include/configs/tegra-common.h    |  14 +--
 include/dm/device-internal.h      |  10 ++
 include/dm/util.h                 |   6 ++
 include/malloc.h                  |  60 +++++++-----
 scripts/Makefile.spl              |   1 +
 26 files changed, 527 insertions(+), 254 deletions(-)
 create mode 100644 common/malloc_simple.c
 create mode 100644 drivers/core/device-remove.c

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2.1.0.rc2.206.gedb03e5