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/drivers/core/root.c b/drivers/core/root.c
index 3e52452..446ac2f 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -133,6 +133,18 @@
{
DM_ROOT_NON_CONST = DM_DEVICE_GET(root);
+ if (CONFIG_IS_ENABLED(OF_PLATDATA_RT)) {
+ struct udevice_rt *urt;
+ int n_ents;
+
+ /* Allocate the udevice_rt table */
+ n_ents = ll_entry_count(struct udevice, udevice);
+ urt = calloc(n_ents, sizeof(struct udevice_rt));
+ if (!urt)
+ return log_msg_ret("urt", -ENOMEM);
+ gd_set_dm_udevice_rt(urt);
+ }
+
return 0;
}
@@ -205,7 +217,7 @@
{
int ret;
- if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
+ if (CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT)) {
struct driver_rt *dyn;
int n_ents;