[U-Boot] [PATCH v3 15/16] dm: Add README for driver model

[Marek Vasut <marex@denx.de>]

Dear Simon Glass,

> From: Pavel Herrmann <morpheus.ibis@gmail.com>
> 
> This adds a README to help with understanding of this series.
> 
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
> Changes in v3:
> - Updated README.txt to cover changes since version 2
> 
> Changes in v2:
> - Removed pointer return values in favour of integer
> - Use driver_bind() in dm_init() instead of writing new code
> - Allow driver_bind() to support a NULL parent
> - Add dm_warn() to warn about impending doom
> - Standardise variable names (e.g. uclass instead of class)
> - Remove relocation functions
> - Add new header file for lists
> - Add new util file to hold utility functions
> - Allow a driver to bind to only one uclass
> - Remove unneeded arguments to uclass_bind(), uclass_unbind()
> - Rename struct device's 'bus' to 'parent'
> - Rename data structures to hopefully be clearer
> - Put platform_data definitions in their own header file
> - Add U_BOOT_DEVICE to declare platform_data
> - Add auto-probing feature for platform_data to avoid driver_bind() calls
> - Add simple unit test functions
> - Add test infrastructure for driver model
> - Add integration tests for driver model
> - Add device tree support in driver model
> - Add automatic allocation of platform_data for FDT
> - Add automatic allocation of priv data for devices
> - Add automatic allocation of device-specific priv data for uclasses
> - Add GPIO uclass and tests
> - Add sandbox GPIO driver
> - Update gpio command to use driver model
> - Add tests for core code
> - Add script to run tests
> - Add a single include/dm.h to bring in driver model code

You might _really_ want to reorder the readme in front of the actual DM patches.

Best regards,
Marek Vasut