dm: core: Create a struct for device runtime info
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@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/dts/Kconfig b/dts/Kconfig
index e6bbdc5..99ce75e 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -338,6 +338,7 @@
bool "Generate platform data for use in SPL"
depends on SPL_OF_CONTROL
select DTOC
+ select SPL_OF_PLATDATA_DRIVER_RT if !SPL_OF_PLATDATA_INST
help
For very constrained SPL environments the overhead of decoding
device tree nodes and converting their contents into platform data
@@ -391,12 +392,22 @@
struct udevice (at present just the flags) into a separate struct,
which is allocated at runtime.
+config SPL_OF_PLATDATA_DRIVER_RT
+ bool
+ help
+ Use a separate struct for driver runtime data.
+
+ This enables the driver_rt information, used with of-platdata when
+ of-platdata-inst is not used. It allows finding devices by their
+ driver data.
+
endif
config TPL_OF_PLATDATA
bool "Generate platform data for use in TPL"
depends on TPL_OF_CONTROL
select DTOC
+ select TPL_OF_PLATDATA_DRIVER_RT if !TPL_OF_PLATDATA_INST
help
For very constrained SPL environments the overhead of decoding
device tree nodes and converting their contents into platform data
@@ -451,6 +462,15 @@
struct udevice (at present just the flags) into a separate struct,
which is allocated at runtime.
+config TPL_OF_PLATDATA_DRIVER_RT
+ bool
+ help
+ Use a separate struct for driver runtime data.
+
+ This enables the driver_rt information, used with of-platdata when
+ of-platdata-inst is not used. It allows finding devices by their
+ driver data.
+
endif
endmenu