[PATCH v4 26/42] dm: core: Create a struct for device runtime info

[Simon Glass]

At present when driver model needs to change a device it simply updates
the struct udevice structure. But with of-platdata-inst most of the fields
are not modified at runtime. In fact, typically only the flags need to
change.

For systems running SPL from read-only memory it is convenient to separate
out the runtime information, so that the devices don't need to be copied
before being used.

Create a new udevice_rt table, similar to the existing driver_rt. For now
it just holds the flags, although they are not used in this patch.

Add a new Kconfig for the driver_rt data, since this is not needed when
of-platdata-inst is used.

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

(no changes since v2)

Changes in v2:
- Use separate OF_PLATDATA_DRIVER_RT Kconfigs for driver run-time data
- Update the condition for dm_test_of_plat_dev()

 drivers/core/root.c               | 14 +++++++++++++-
 dts/Kconfig                       | 20 ++++++++++++++++++++
 include/asm-generic/global_data.h | 16 ++++++++++++++--
 include/dm/device.h               | 15 +++++++++++++++
 test/dm/of_platdata.c             |  2 +-
 5 files changed, 63 insertions(+), 4 deletions(-)

Applied to u-boot-dm/next, thanks!